New paper in MSSP

The paper titled “Low-complexity 8-point DCT Approximation Based on Angle Similarity for Image and Video Coding” has been accepted for publication at Springer Multidimensional Systems and Signal Processing (MSSP). Congrats to co-authors Renato Cintra, Thiago Trugillo, Raiza Oliviera, Fabio Bayer, Andre Leite and Arjuna Madanayake.

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Best paper award at IEEE MerCon

Our paper titled “Real-Time 2-D FIR Trapezoidal Digital Filters for 2.4 GHz Aperture Receiver Applications” has won a best paper award at IEEE Moratuwa Engineering Research Conference (MerCon) 2018. Congratulations to all co-authors.

 

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New paper in AWPL

The paper titled “Low-Complexity Wideband Transmit Beamforming using Network-Resonant Digital Plane-Wave Filters” has been accepted at IEEE Antennas and Wireless Propagation Letters (AWPL). Congratulations to Chamith Wijenayake, Nilan Udayanga, Sravan Pulipati, Arjuna Madanayake and Dr. Len Bruton.

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Vitor Countinho delivers invited seminar

Vitor Coutingo delivered the research talk titled ““Low-complexity Discrete Transforms and Algorithms for Signal Processing Applications” on invitation by Dr. Arjuna Madanayake. Vitor is a J-1 visiting Ph.D. Candidate from UFPE, Brazil, under supervision from Drs. Renato Cintra and Fabio Bayer.

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Security-Aware Digital Phased-Array Design Workshop at NSWC, Crane

The ASPC Group, in collaboration with Dr. Nghi Tran, and Dr. Hong Liang (TSU) conducted a 2-day workshop on security-aware digital phased-array design for NSWC, Crane, IN, engineers. Viduneth Ariyarathna, Nilan Udayanga, Sravan Pulipati and Suresh Madhishetty were the resource persons in the workshop. We thank the Office of Naval Research (ONR) for financial support.

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New paper in IEEE Trans. on Computers

The paper titled “Computation of 2D 8×8 DCT Based on the Loeffler Factorization Using Algebraic Integer Encoding” is accepted for publication in IEEE Transactions on Computers. Congratulations to co-authors Renato Cintra, Diego Coelho, Sushma Nimalapalli, Vassil Dimitrov, Arjuna Madanayake and Arnaud Tisserand.

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New paper at Springer CSSP

The paper titled “Design and Digital Implementation of Fast and Recursive DCT II-IV Algorithms” is accepted for publication in Circuits, Systems and Signal Processing (CSSP). Many congratulations to Shirani Perera, Arjuna Madanayake, Nathan Dornback, and Nilan Udayanga.

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UA team attends B5GS

Dr. Arjuna Madanayake, Viduneth Ariyarathna, Sravan Pulipati*, and Suresh Madhishetty
contributed to the Brooklyn 5G Summit 2018 at the invitation of NYU-Wireless Founding Director Professor Ted Rappaport. A 32-beam receiver demo was implemented and showcased by UA students.

*  did not attend but contributed to the demo.

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New paper in IEEE JETCAS

The paper titled “Analog Approximate-FFT 8/16-Beam Algorithms, Architectures and CMOS Circuits for 5G Beamforming MIMO Transceivers” has been accepted for publication. Many congratulations to co-authors Viduneth Ariyarathna, Leo Belostotski, Soumyajit Mandal, Xinyao Tang, Renato Cintra, Arjuna Madanayake and Ted Rappaport. The paper will appear in IEEE Journal of  Emerging and Selected Topics in Circuits and Systems (JETCAS).

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Invited seminar by Shubhendu Bhardwaj

Professor Shubhendu Bhardwaj from Florida International University (FIU) gave an invited talk titled “Skewed World of Plasma-wave Modeling: Challenges and Solutions using Unconditionally Stable FDTD Methods”.

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New paper at IEEE MerCon 2018

The paper titled “Real-Time 2-D FIR Trapezoidal Digital Filters for 2.4 GHz Aperture Receiver Applications” has been accepted at IEEE MerCon 2018.

Congratulations to co-authors Viduneth Ariyarathna, Vitor A Coutinho (UFPE), Sravan Pulipati, Arjuna Madanayake, Ravi Wijesekara (Univ. of Moratuwa), Chamira Edussooriya (Univ. of Moratuwa), Leonard T. Bruton (Univ. of Calgary), Thushara Gunaratne (DRAO), and Renato J. S. Cintra (UFPE).

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Seminar at University of Moratuwa, Sri Lanka

Arjuna Madanayake gave a talk titled “FPGA Signal Processing for Element-wise Digital Multi-Beam Array Transceivers” at the University of Moratuwa, Sri Lanka, on March 29, 2018. The talk was arranged by Dr. Chamira Edussooriya and Dr. Dilum Bandara.

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New paper in IEEE JSTSP

The paper  “Wideband N-Beam Arrays using Low-Complexity Algorithms and Mixed Signal Integrated Circuits” has been accepted at IEEE Journal of Selected Topics in Signal Processing. Congratulations to co-authors Shirani Perera, Viduneth Ariyarathna, Nilan Udayanga,  Arjuna Madanayake, Ge Wu, Leonid Belostotski,  Yingying Wang, Soumyajit Mandal, Renato Cintra, and Ted Rappaport.

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Arjuna Madanayake wins “Outstanding Researcher” award

Arjuna Madanayake is grateful to his colleagues at the University of Akron for this recognition. Thank you so very much.

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DARPA award on UA website

UA website news item

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Arjuna Madanayake attends Military Radar Summit 2018

Dr. Arjuna Madanayake attended the Military Radar Summit 2018 in DC. Link here

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Invited talk at Florida International University

Dr. Arjuna Madanayake gave an invited seminar at Florida International University (FIU) titled “Analog and RF Digital Signal Processing Circuits for Massively Multibeam Arrays” on the invitation of Dr. John Volakis.

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DARPA Phase-2 Project with Ocius goes public

The STTR Phase-2 Project with Ocius Technologies from DARPA DSO has
hit the news: see

https://www.eurekalert.org/pub_releases/2018-02/uoa-uoa020518.php

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DARPA MIDAS Proposers Day

Arjuna Madanayake and Viduneth Ariyarathna attended DARPA Microsystems Technology Office (MTO) Proposer’s Day on the mm-wave digital arrays (MIDAS) program.

A poster titled “Analog Approximate-FFT Multibeam Algorithms, Architectures and Space-Time Noise Shaping Circuits for mmW Arrays” was presented. Co-authors include Arjuna Madanayake, Viduneth Ariyarathna, Nilan Udayanga, Diego Coelho (University of Calgary), Leonid Belostotski (University of Calgary), Renato Cintra (UFPE), Soumyajit Mandal (CWRU), Jifu Liang (CWRU), Yingying Wang (CWRU) and Vishal Saxena (University of Idaho).

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Two papers at IEEE IMS’2018

Two papers have been accepted for publication at IEEE 2018 International Microwave Symposium (IMS).

  1. An 8-Beam 2.4 GHz Digital Array Receiver Based on a Fast Multiplierless Spatial DFT Approximation, Vitor Countinho, Viduneth Ariyarathna, Diego Coelho, Renato Cintra, and Arjuna Madanayake.
  2. A 16-Element 2.4-GHz Digital Array Receiver using 2-D IIR Spatially-Bandpass Plane-Wave Filter, Sravan Pulipati, Viduneth Ariyarathna and Arjuna Madanayake.

    Congratulations, everyone!

 

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Four papers accepted at ISCAS’2018

The following papers have been accepted for publication at IEEE 2018
International Symposium on Circuits and Systems (ISCAS) to be held in Florence, Italy.

  1. Low-Complexity 4-D IIR Filters for Multi-Depth Filtering and Occlusion Suppression in Light Fields, Namalka Liyanage, Chamith Wijenayake, Chamira Edussooriya, Arjuna Madanayake, Pan Agathoklis, Eliathamby Ambikairah, and Len T. Bruton
  2. Continuous-Time Analog Computing Circuits for Solving the Electromagnetic Wave Equation, Nilan Udayanga, Arjuna Madanayake, S.I. Hariharan, and Nathaniel Hawk.
  3. Multiport ADCs for Microwave Focal Plane Array Dish Receivers, Najath Akram, Arjuna Madanayake, Soumyajit Mandal, Suranga Handagala, and Leonid Belostotski.
  4. An Offset-Canceling Approximate-DFT Beamforming Architecture for Wireless Transceivers, Haixiang Zhao, Soumyajit Mandal, Viduneth Ariyarathna, Arjuna Madanayake, and Renato Cintra.

Congratulations, everybody!

 

 

 

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Arjuna Madanayake attended mmW RCN

Dr. Arjuna Madanayake attended the NSF sponsored mmW Research Coordination Network (RCN) workshop at the University of Arizona, 18-19 January 2018. Two posters were presented.

1) Arjuna Madanayake, Jin Wei, Vishal Saxena (University of Idaho), Dimitra Psyhogiou (UC Boulder), Soumyajit Mandal (Case Western Reserve University), Renato Cintra (UFPE, Brazil), Leo Belostotski (University of Calgary), Gihan Mendis, Viduneth Ariyarathna, Nilan Udayanga, and Yingying Wang (Case Western Reserve University), “Attention, Saliency, and Contextual Adaptation in RF Machine Learning Array Receivers”.

2) Arjuna Madanayake, Renato Cintra (UFPE, Brazil), Dimitra Psychogiou (UC Boulder), Soumyajit Mandal (Case Western Reserve University), Leo Belostotski (University of Calgary), Viduneth Ariyarathna, Diego Coelho (University of Calgary), Vitor Coutinho (UFPE visiting student at University of Akron), Najath Akram, and Nilan Udayanga, “Co-Design of RF Front-Ends and O(N) Approximate-DFTs for Low-SWaP SDR Receivers”.

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New paper at CSSP

Congratulations to Vítor Coutinho, Renato Cintra, Fábio Bayer, Paulo Oliveira, Raíza Oliveira, and Arjuna Madanayake for the new paper titled “Pruned Discrete Tchebichef Transform Approximation for Image Compression” accepted for publication at Springer Circuits, Systems and Signal Processing (CSSP).

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Arjuna Madanayake attends WinnComm 2017

Dr. Arjuna Madanayake attended WinnComm 2017 in San Diego.
Two papers were published on the topics of modulation recognition and UAS detection using machine learning based on deep belief networks and convolutional neural nets.

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Invited talk at Texas Tech

Arjuna Madanayake gave a seminar at Texas Tech in Lubbock, Tx,  titled “Algorithms, Circuits and Architectures for Multi-Beam Array Processing, Modulation Recognition, and UAS Classication” on the invitation of Dr. Changzhi Li. We thank  Changzhi, Ranadip Pal, and Texas Tech for their generosity in organizing the visit.

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ASPC Lab attends CASPER 2017 Workshop

Viduneth Ariyarathna attended and presented our research in a poster titled “ROACH-2 based Prototype Implementation of an 8-Beam Multiplierless Approximate-DFT Based Aperture Array Receiver” at the 2017 CASPER Workshop.   The workshop was held at Caltech in August 2017.

 

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New NSF SpecEES Award

The project titled “SpecEES: Collaborative Research: Spatially Oversampled Dense Multi-Beam Millimeter-Wave Communications for Exponentially Increased Energy-Efficiency” has been approved and starts today! The project is a 4-university collaborative project between the University of Akron, with lead-PI Arjuna Madanayake, Case Western Reserve University with PI Soumyajit Mandal, SUNY Stony Brook, with PI Xin Wang, and NYU-Tandon with PI Ted Rappaport. The project has a total value of $750,000, with equal share to each partner institution.

 

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NE-Ohio Regional Workshop on Community Infrastructure for Analog Circuit Design

A 1-day workshop on community infrastructure needs for analog circuit design in NE Ohio was organized and held at Case Western Reserve University (on Aug 18). The workshop is part of an ongoing NSF project between CWRU and the University of Akron. Dr. Sankar Basu (NSF) and Dr. Mingoo Seok (Columbia University) gave keynotes. More details here:

https://sites.google.com/site/casecirc/ci-workshop-2017

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Two papers on machine learning for intelligent radio accepted

Two papers, by Jin Wei, Gihan Mendis and Arjuna Madanayake, have been accepted at 2017 Wireless Innovation Forum Conference on Communications Technologies and Software Defined Radio (WinnComm).

The papers are 1) Deep Learning-based Intelligent Method for Automatic Modulation Classification in Cognitive Radios, and 2) Deep Learning-based Cognitive Radar System for Micro-UAS Detection and Classification.

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Arjuna Madanayake speaks at ENTC

Dr. Arjuna Madanayake gave an invited seminar on “Design and Implementation of a 16-Beam Digital Array Receiver” at the Department of Electronic and Telecommunication Engineering (ENTC) at the University of Moratuwa (July 21). The seminar is part of the monthly Colloquium and was on the invitation of Dr. Chamira Edussooriya.

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New paper at IEEE N-Dimensional Systems

The paper titled “Improving ADC Figure-of-Merit in Wideband Antenna Array Receivers using Multidimensional Space-Time Delta-Sigma Multiport Circuits” has been accepted for presentation at IEEE NDS’2017. Congratulations to co-authors Najath Akram, Soumyajit Mandal, Jifu Liang and Leonid Belostotski.

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Arjuna Madanayake gives invited seminar at DRAO

Dr. Arjuna Madanayake gave an invited seminar at the Dominion Radio Astrophysical Observatory (DRAO) in Penticton, BC, Canada, on the topic “Design and Prototype Implementation of an 8-Beam 2.4 GHz Array Receiver for Digital Beamforming”.

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New Award from National Science Foundation

The NSF ECCS has awarded the University of Akron and Case Western Reserve University a collaborative proposal titled “Collaborative Research: Wideband Multi-Beam Antenna Arrays: Low-Complexity Algorithms and Analog-CMOS Implementations”. The award includes a sub-award to Embry-Riddle Aeronautical University. Congratulations to co-investigators Dr. Shirani Perera, ERAU, and Dr. Soumyajit Mandal, CWRU. The project is part of NSF ECCS unsolicited programs with program manager Dr. Jenshan Lin. The award to UA is worth $224,975 including a $53,535 sub-award to ERAU. Collaborators include Dr. Renato Cintra, UFPE, Brazil, and Dr. Leo Belostotski, University of Calgary, Canada. The PIs are grateful to NSF for supporting this research on 5G wireless communications.

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New MDPI Journal Paper

The paper titled “Multidimensional-DSP Beamformers using The ROACH-2 FPGA Platform” has been accepted at MDPI Electronics, Special Issue on Smart Antennas and MIMO Communications, edited by Dr. Hamid Bahrami. Congratulations to co-authors Vishwa Seneviratne and Len Bruton.

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DARPA Defense Science Office (DSO) Discover Day

Arjuna Madanayake and Jin Wei attended DARPA DSO Discover Day in Arlington, VA. A poster titled “Deep Learning for Wireless Modulation Recognition and Identification of Micro-UAS” was presented. The work is a joint collaboration with Dr. Mingoo Seok at Columbia University and Dr. Jae-Sun Seo at Arizona State University (ASU).

 

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Four papers accepted at IEEE MWSCAS 2017

The following four papers have been accepted at IEEE Mid-West Symposium on Circuits and Systems (MWSCAS’2017) which will be held in Boston, in August 2017.

Viduneth Ariyarathna, Arjuna Madanayake, Leo Belostotski, Shirani Perera, Renato Cintra, and Nilan Udayanga, “Design of a Low-Complexity Wideband Analog True-Time-Delay 5-Beam Array in 65nm CMOS”.

Nilan Udayanga, SI Hariharan and Arjuna Madanayake, “Continuous-Time Algorithms for Solving the Electromagnetic Wave Equation in Analog ICs” (invited paper).

Yingying Wang, Suranga Handagala, Arjuna Madanayake, Soumyajit Mandal and Leo Belostotski, “N-Port LNAs for mmW Array Processors Using 2-D Spatio-Temporal  Noise-Shaping”.

Jiffy Liang, Soumyajit Mandal, Arjuna Madanayake, Leo Belostotski, Suranga Handagala, Ali Nikoofard, “Low-Complexity N-Port ADCs Using 2-D Delta-Sigma Noise-Shaping for N-Element Array Receivers”.

Congratulations to all authors.

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New paper at IEEE Mercon 2017

Congratulations to co-authors Viduneth Ariyarathna, Nilan Udayanga, both at UA, Leonid Belostotski (University of Calgary, Canada), Sirani Perera (Embry-Riddle Aeronautical University), and Renato J Cintra (UFPE, Brazil) for the paper titled “Design Methodology of an Analog 9-Beam Squint-Free Wideband IF Multi-Beamformer for mmW Applications” which has been accepted at IEEE Mercon 2017.

 

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New paper at IEEE Mercon 2017

The paper titled “Energy-Efficient ULF/VLF Transmitters Based on Mechanically Rotating Dipoles” has been accepted at IEEE Moratuwa Engineering Research Conference (Mercon). Congratulations to co-authors  Choi Seungdeog, Mohammad Tarek and Shamini Dharmasena, at UA, and to Soumyajit Mandal, Jarred Glickstein and Alp Sehirlioglu, who are at the Case Western Reserve University.

 

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Visiting Professor from Brazil

Professor Renato Cintra of UFPE, Brazil, is visiting the ASPC Lab for about two weeks as part of an on-going collaboration funded by the DARPA Microsystems Technology Office (MTO). Professor Cintra is an expert at approximate transforms and fast algorithms. Welcome, Renato.

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New ARITH paper

The paper titled  “A Parallel Method for the Computation of Matrix Exponential based on Truncated Neumann Series” is accepted at IEEE ARITH 2017. Deep congratulations to co-authors Vassil Dimitrov, Diego Coelho, Logan Rakai, all at the University of Calgary, Canada,  Renato Cintra, from UFPE in Brazil, and Viduneth Ariyarathna, at UA.

http://arithsymposium.org/

 

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Arjuna attends Brooklyn 5G Summit 2017

Dr. Arjuna Madanayake attended the Brooklyn 5G Summit, 2017, held at NYU-Tandon with the leadership of Professor Ted Rappaport. The summit is sponsored mainly by Nokia. We are grateful to Dr. Rappaport for the invitation.

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Invited seminar at Manhattan College, NY.

Arjuna Madanayake gave an invited seminar at Manhattan College, NY, on the invitation of Professor George Giakos. The topic was “Analog Co-Processors for Solving Linear and Nonlinear Partial Differential Equations”. The talk covers the Phase-I progress in a DARPA DSO STTR Project under the ACCESS Program.

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Invited seminar at Columbia University

Arjuna Madanayake gave a talk at Columbia University, NY, as part of the Columbia Integrated Systems Laboratory (CISL) Seminar Series, on the invitation of Professor Mingoo Seok. The title of the talk was “Analog Co-Processors for Solving Linear and Nonlinear Partial Differential Equations”. The talk covers the Phase-I progress in a DARPA DSO STTR Project under the ACCESS Program.

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Invited talk at Case Western Reserve University

Arjuna Madanayake gave a talk titled “Analog Co-Processors for Solving Linear and Nonlinear Partial Differential Equations” on the invitation of Professor Soumyajit Mandal at Case Western Reserve University (CWRU). The talk covers the progress made in the first year of the base period of a DARPA STTR Project under the ACCESS Program at the Defense Sciences Office (DSO).

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DARPA L2M Proposers Day

Arjuna Madanayake and Jin Wei attended the DARPA MTO Lifelong Learning Machines (L2M) Proposer’s Day at the DARPA Conference Center. A poster titled “Deep learning based distributed multi-beam UAS-tracking radar solutions” was presented.

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GOMAC in Reno, NV!

Dr. Arjuna Madanayake attended GOMACTech’2017 in Reno, Nevada. He presented a paper in the Phased-Arrays session.

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New paper accepted at IET Electronic Letters

Congratulations to co-authors Paulo Oliveira, Raiza Oliveira, Renato Cintra, and Fábio Bayer for the paper titled “JPEG quantisation requires bit-shifts only”, to appear in IET Electronics Letters.

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ASPC Lab attends Military Radar Summit 2017

Dr. Arjuna Madanayake and Nilan Udayanga attended the 2017 Military Radar Summit, in Washington DC.

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New paper at IEEE Trans. on Computers

The paper titled “DFT Computation using Gauss-Eisenstein Basis: FFT Algorithms and VLSI Architectures” has been accepted for publication in IEEE Trans. on Computers. Well done, co-authors Diego Coelho, Renato Cintra, Vassil Dimitrov, Nilanka Rajapaksha, and Gihan Mendis.

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Four abstracts accepted at the NASA/IEEE CCAA

Four abstracts have been accepted at the IEEE CCAA Workshop organized by NASA Glenn. Congratulations to all authors. The abstracts are

1. Digital Architecture for Real-Time CNN-based Face Detection for Video Processing, with Smrity Bhattari, Renato Cintra (UFPE), Stefan Duffner (LIRIS, INSA), and Christophe Garcia (LIRIS, INSA).
2. Deep belief network for automated modulation classification in cognitive radio, with Jin Wei and Gihan Mendis.
3. Deep learning cognitive radar for micro-UAS detection and classification, with Jin Wei and Gihan Mendis.
4. Assessment of cognitive communications interest areas for NASA needs and benefits, with Erik Knobloc (NASA).

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New paper at IEEE VTC 2017

The paper “All-Pass Filter based Synthesis of Multifunctional Microwave Active Circuits” has been accepted for publication at IEEE Vehicular Technologies Conference (VTC) to be held in Australia. VTC’2017 is scheduled to be held in Sydney, 4-7 June. Congratulations to Chamith Wijenayake, Nilan Udayanga and Leo Belostotski.

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New paper at IEEE International Microwave Symposium

The paper titled “0.96-to-5.1GHz 4-Element Spatial-Analog IIR-enhanced Delay-and-Sum Beamformer” has been accepted at IEEE IMS 2017, to be presented in Hawaii this summer. Congratulations to co-authors Peyman Ahmadi and Leo Belostotski from the University of Calgary.

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Paper accepted for ISCAS TCAS Special Session

The paper titled “A New 2nd–Order Allpass Filter in 130nm CMOS” with lead authors from the University of Calgary, Canada, has been accepted for presentation at the IEEE International Symposium on Circuits and Systems (ISCAS), Special Session on papers recently published in IEEE Transactions on Circuits and Systems.

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Sravan defends his MS

Sravan Pulipati has defended his MS. The thesis topic is “Electronically-Scanned Wideband Digital Aperture Antenna Arrays using Multi-Dimensional Space-Time Circuit-Network Resonance”. The project was co-advised by Dr. Arjuna Madanayake and Dr. Nghi Tran, with committee member Dr. Kye-Shin Lee, and was supported by the Office of Naval Research (ONR) STEM Program, with partial support from the National Science Foundation (NSF). Sravan will be starting his PhD in Spring 2017 at the University of Akron. Deep congratulations to Sravan Pulipati.

sravan

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Smrity Bhattarai defends her MS

Congratulations to Smrity Bhattarai for defending her MS thesis on “Digital Architecture for Real-time Face Detection for Deep Video Packet Inspection Systems”. The project was co-advised with Dr. Ryan Toonen, and is a collaborative effort with Dr. Renato Cintra, UFPE, Brazil, and, Drs. Christophe Garcia and Stefan Duffner, both at LIRIS, INSA, Lyon, France. The thesis committee consisted of Dr. Arjuna Madanayake (Adviser), Dr. Ryan Toonen (Co-Adviser) and Dr. Kye-Shin Lee.

smritydefense

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Talk about Tokamaks!

The ASPC Lab organized a guest talk titled “Nuclear fusion in up-down asymmetric tokamaks” . The speaker was Dr. Justin Ball- a post-doc at École Polytechnique Fédérale de Lausanne in Switzerland.

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DARPA ACCESS Kick-Off Meeting

Arjuna Madanayake attended the DARPA ACCESS Kick-Off Meeting at the Executive Conference Center. Arjuna gave an invited seminar on the findings of an analog RF-IC computational acceleration project (DARPA STTR Program-Phase-I), in collaboration with Ocius Technologies. The ACCESS event was organized by DARPA Defense Sciences Office (DSO) under the leadership of Program Manager Dr. Vincent Tang.

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Kickoff Workshop of the mmW RCN

Arjuna Madanayake attended and presented findings on sigma-delta spatio-temporal beamforming arrays at the Kickoff Workshop of the mmW RCN in Washington, DC. This is a collaborative project with Dr. Soumyajit Mandal at CWRU. The mmW RCN was organized by a team led by Professor Akbar Sayeed at University of Wisconsin – Madison.

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New paper at GoMacTech-2017

The paper “Analog 65nm CMOS 5GHz Sub-Arrays with ROACH-2 FPGA Beamformers for Hybrid Aperture-Array Receivers” has been accepted for presentation at GoMacTech-2017. Congratulations to Viduneth, Nilan, Ali, Soumyajit, Peyman and Leo.

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Deep-learning based modulation classification paper accepted

The paper titled “Deep Learning-Based Automated Modulation Classification for Cognitive Radio” has been accepted at IEEE ICCS2016. Congratulations to co-authors Gihan Mendis and Jin Wei.

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New paper at Journal of Circuits, Systems and Computers (JCSC)

The paper titled “Fast Algorithms and Architectures for 8-point DST-II/DST-VII Approximations” has been accepted for publication at the Journal of Circuits, Systems and Computers (JCSC). Congratulations to Renato, Fabio, Amila and Uma.

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New NSF Award from CISE/CNS

The proposal titled “CI-P: Collaborative Project: Planning for Community Infrastructure to Support Research for Simulating Complex Systems”, $50,003, is being awarded by NSF. This is a joint research with Dr. Soumyajit Mandal at CWRU and PIs Arjuna Madanayake and SI Hariharan at the University of Akron. This 1-year project explores planning activities for a CRI grant aimed at RF analog acceleration of partial differential equation based scientific computation.

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New paper at MILCOM’2016

The paper titled “Deep Learning Based Doppler Radar for Micro UAS Detection and Classification” has been accepted at MILCOM’2016. Congratulations to Jin Wei and Gihan Mendis.

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New journal paper at ISVP

The paper titled “Multiplierless 16-point DCT approximation for low-complexity image and video coding” is accepted for publication at Signal, Image and Video Processing. Congratulations, to Thiago, Raiza and Renato.

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Invited talk at the International Industrial Mathematics Conference

Arjuna Madanayake gave a talk titled “Approximate DFT Algorithms for RF Multi-Beam Beamforming” at the 2016 International Industrial Mathematics Conference, held in June 2016 in Sri Lanka.

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Suranga Handagala defends his MS

Congratulations to Suranga Handagala, for defending his MS thesis on “Special Relativistic Array Multi-Port Circuits with Spacetime Noise-Shaping”. Committee consisted of Arjuna Madanayake (adviser), Ryan Toonen, Kye-Shin Lee and Joan Carletta.

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Vishwa Seneviratne defends his MS

Congratulations to Vishwa Seneviratne for defending his MS thesis titled “Design and Rapid Prototyping of Multi-dimensional DSP Beamformers using ROACH-2 Platform”. Committee consisted of Arjuna Madanayake (adviser), Joan Carletta, and SI Hariharan.

 

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Gihan Mendis defends his MS

Congratulations to Gihan Mendis, for successfully defending his thesis on “Hardware Implementation and Applications of Deep Belief Networks”. Committee consisted of Jin Wei (adviser), Arjuna Madanayake (co-adviser), and SI Hariharan.

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New paper at MSSP

The paper titled “Mixed Microwave-Digital and Multi-Rate Approach for Wideband Beamforming Applications Using 2-D IIR Beam Filters and Nested Uniform Linear Arrays” is accepted into the Special Issue on Array Processing at MSSP. Congratulations to Viduneth Ariyarathna, Len Bruton, and Pan Agathoklis.

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New paper at MSSP

The paper “Applications of RF Aperture-Array Spatially-Bandpass 2-D IIR Filters in Sub-Nyquist Spectrum Sensing, Wideband Doppler Radar and Radio Astronomy Beamforming” has been accepted at Multi-Dimensional Systems and Signal Processing. Congratulations to Nilan Udayanga, Tharindu Randeny, Chamith Wijenayake, Arindam Sengupta, Len Bruton, and Glenn Jones.

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Best paper at MerCon’2016

The paper titled “A 480MHz ROACH-2 FPGA Realization of 2-Phase 2-D IIR Beam Filters for Digital RF Apertures” has won the best-paper award under the “Telecommunications” track at IEEE MerCon’2016. Congratulations to Vishwa Seneviratne and co-authors. A second paper titled “Delta-Sigma Noise Shaping in 2D Spacetime for Uniform Linear Aperture Array Receivers” authored with Suranga Handagala was also presented at MERCON.

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New paper at Circuit Theory and Applications

Many congratulations to Arindam Sengupta, Roberto Gomez-Garcia and Leo Belostotski for the paper titled “Wide-Band Aperture Array Using a Four-channel Manifold-Type Planar Multiplexer and Digital 2-D IIR Filterbank” in Circuit Theory and Applications (CTA).

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New paper at IET Signal Processing

The paper titled “Error-Free Computation of 8-point DCT Based on the Loeffler Factorization and Algebraic Integers” is accepted in the journal IET Signal Processing. Congratulations to Renato Cintra, Vassil Dimitrov, Diego Coelho and Sunera Kulasekera.

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New paper at IEEE Radar Conference 2016

The paper “Wideband Delay-Sum Digital Aperture Using Thiran All-Pass Fractional Delay Filters” has been accepted for lecture presentation at the IEEE 2016 Radar Conference (http://radarconf16.org). Congratulations, Nilan Udayanga and Viduneth Ariyarathna.

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New paper at MSSP

The journal paper titled “Fast FPGA-Architecture for Fan/Beam-Steering in Wave-Digital RF Aperture Arrays” has been accepted at Multidimensional Systems and Signal Processing (MSSP). Congratulations to Sewwandi Wijeratne, Nilanka Rajapaksha and Professor Len Bruton (University of Calgary).

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ISCAS paper accepted

The paper titled “Linear RF Apertures Using 2-D Analog Beam Filters” written with Chamith Wijenayake, Leonid Belostotski, Len Bruton and Yongsheng Xu has been accepted as a lecture presentation in the RF circuit session at ISCAS’2016.

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DARPA STTR proposal with Ocius Technologies approved

The DARPA STTR proposal titled “Analog Co-Processors for Complex System Simulation and Design” with Ocius Technologies (Dr. Dale Mugler) has been selected for negotiation. The Co-PI is Dr. SI Hariharan.

 

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Viduneth defends his MS

Many congratulations, to Viduneth Ariyarathna, for defending his MS thesis titled “Scanned/Multi-Beam Aperture Array Processing using a Combined Analog
IC and Digital Systems Approach”. Committee members include Dr. Nghi Tran and Dr. Kye-Shin Lee. This research was sponsored by the National Science Foundation.

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New paper accepted at CSSP

Congratulations to Fabio, Vitor, Sunera, Andre and Renato, for the paper titled “Energy-efficient 8-point DCT Approximations: Theory and Hardware Architectures”. This paper is now accepted for publication at the journal Circuits, Systems and Signal Processing (CSSP), published by Springer.

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New paper at IEEE Trans. Circuits and Systems for Video Technology

The paper titled “Low-complexity Image and Video Coding Based on an Approximate Discrete Tchebichef Transform” has been accepted at IEEE TCSVT. Congratulations to Paulo, Renato, Fabio, and Sunera.

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New education grant from ONR

Dr. Nghi Tran and Dr. Arjuna Madanayake received an award to explore STEM Education topics on Embedded Systems Security, from the Office of Naval Research (ONR). The University of Akron sub-award component is worth $360,000. The total award is $600,000, and is led by Tennessee State University.

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ASPC lab receives DARPA award

Dr. Arjuna Madanayake and collaborator Dr. Renato Cintra secured a 1-year project titled “Multi-Beam RF Aperture Arrays using Multiplierless Approximate FFT” from the Defense Advanced Research Projects Agency (DARPA). The project is sponsored by the Microsystems Technology Office (MTO).

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New paper at IEEE TCAS-II

Congratulations to Peyman  Ahmadi, Brent Maundy, Ahmed Elwakil, Leonid Belostotski and Arjuna Madanayake for their paper titled “A New 2nd-Order Allpass Filter in 130nm CMOS”, which has been accepted for publication in IEEE Trans. on Circuits and Systems-II: Express Briefs.

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IEEE Multi-Dimensional Systems (nDS) in Vila Real, Portugal

Dr. Arjuna Madanayake attended IEEE Multi-Dimensional Systems (nDS)’ 2015, in Vila Real, Portugal. He presented two papers, with student authors Suranga Handagala, Nilan Udayanga, and Vishwa Seneviratne.

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Nilan Udayanga completes his MS

Deep congratulations to Nilan Udayanga for the successful defense of his MS thesis on “Digital 2-D/3-D Beam Filters for Adaptive Applebaum Receive and Transmit Arrays”. Nilan’s work was supported by the Office of Naval Research (ONR) (Dr. Santanu Das) and the NSF EARS program (Dr. George Haddad and Dr. Andrew Clegg).

Nilan starts work on a doctorate in Fall 2015.

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Two papers accepted at IEEE ICICS’2015

Congratulations to Nilan and Viduneth and our collaborators Dr. L.T. Bruton (University of Calgary, Canada) and Dr. Pan Agathoklis (University of Victoria, Canada) for two papers accepted at IEEE ICICS, 2015, to be held in Singapore in December 2015. The papers are

Nilan Udayanga, Arjuna Madanayake and Len T. Bruton, “Increasing SINR of Microwave Applebaum Adaptive Arrays using Analog 2-D IIR Space-Time Network-Resonant Beam Filters”, and,

Viduneth Ariyaratne, Arjuna Madanayake, and Pan Agathoklis, “Wideband Mixed Microwave-Digital 2-D IIR Beam Filters for Nested Uniform Linear Array Processing”.

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Two papers at IEEE N-Dimensional Systems

Congratulations to Vishwa, Suranga, and Nilan for their accepted papers at IEEE N-dimensional Systems (NDS), to be held in Vila Real, Portugal, in September 2015. The papers are

S. Handagala, A. Madanayake and N. Udayanga, “Design of a Millimeter-Wave Dish-Antenna based 3-D IIR Radar Digital Velocity Filter” and,

V. Seneviratne, A. Madanayake and N. Udayanga, “Wideband 32-element 100-MHz 2-D IIR Beam Filters using ROACH-2 Virtex-6 sx475t FPGA”.

 

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Smrity Bhattarai joins the ASPC Lab

MS student Smrity Bhattarai joins the group. She will be working on an NSF funded research on RF orbital angular momentum of photons and  resulting vortex waves.

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Suneka Kulasekara defends his MS

Congratulations to Sunera for successfully defending his MS thesis. Sunera’s thesis is titled “Multiplierless DFT, DCT Approximations for Multi-Beam RF Aperture and HEVC HD Video Applications: Digital Systems Implementation” and is a collaborative work with Dr. Renato Cintra and Dr. Fabio Bayer (Brazil).2015-08-14 15.51.53 HDR

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ASPC lab graduate Arindam Sengupta moves to Google

Many congratulations to Arindam Sengupta, who has moved from NRAO Greenbank to Google, CA. Arindam worked on mixed microwave-digital beamformers at the ASPC lab.

Arindam_Google_MTVCampus

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New PhD student in antennas and electromagnetics

ASPC Lab welcomes PhD Candidate Farzad Ahmadi (primary adviser Dr. Igor Tsukerman) to the team. Farzad will be working on antenna design, electromagnetic band gap structures and meta-materials for advanced array signal processing.

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NASA grant for undergraduate research

Dr. Madanayake’s 2014 NSF EARS REU intern Degrafth Palmore as won an Ohio Space Grants Consortium (OSGC) scholarship from NASA for his ongoing research with the ASPC team in 2015-16. Congratulations, Degrafth!

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ASPC lab welcomes new WIE student interns

ASPC Lab welcomes incoming ECE freshman Julia Hariharan, as well as ECE sophomores Adrianna Dunlap and Yamini Yamini as part time summer research interns. Adrianna and Yamini are supported by NSF as part of our broader impacts activities.

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Advanced ROACH2-FPGA workshop at NRAO Greenbank

A workshop covering advanced topics related to ROACH2 based digital system design was organized by Arjuna Madanayake in collaboration with John Ford, Arindam Sengupta and Jason Ray at the Greenbank Telescope (GBT) in West Virginia.

This two-day workshop was attended by University of Akron graduate students Nilan Udayanga, Vishwa Seneviratne, Suranga Handagala, Sravan Pulipati, Reza Oliveira (visiting from UFPE, Brazil), and Gihan Mendis. The students learned advanced topics such as ROACH2 clock nets, 10 MHz reference oscillators, compiling for 16-input RF ADC, and designing communications using 10 Gbps Ethernet IP cores.

The highlight of the trip was the climb to the focal plane of the Robert C. Byrd telescope!

The dish antenna is 485 feet tall and is the largest moveable structure on land ever built.

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ASPC Lab hosts NE Ohio ROACH2 workshop

Dr. Arjuna Madanayake and Dr. Vijay Devabhaktuni organized the first NE Ohio undergraduate/graduate workshop on “ROACH2 based FPGA Systems” at the ASPC Lab on May 30 2015. Four students from the University of Toledo and six students from the University of Akron (including an exchange student from UFPE, Brazil) participated. This workshop is an NSF Broader Impacts activity.

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New NSF Grant for Vortex-Wave Beam Enhancement

Drs. Madanayake, Toonen and Zhu, with their collaborator Dr. Henderson at UT Dallas, has been awarded an NSF ECCS Collaborative Award “Enhancement of Radio Wave Beams Carrying Extrinsic Orbital Angular Momentum: Multi-Dimensional Array Processors, Multiferroic Antennas, and RF Integrated Circuits”. The 3-year project is led by Arjuna Madanayake.

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Special Session at ISCAS’2015

Dr. Arjuna Madanayake and Dr. Zhiping (Penn) Lin organized a special session on “Recent Advances in Multidimensional Systems and Signal Processing”, at IEEE International Symposium on Circuits and Systems (ISCAS) 2015 in Lisbon, Portugal. This session was made possible by NSF-EARS grant funding.

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Tharindu Defends his MS

Deep congratulations to Tharindu Randeny for his successful MS thesis defense. The thesis title is “Multidimensional Digital Signal Processing in Radar Signature Extraction”. Tharindu’s MS was supported in part by the College of Engineering, UARF and NSF Enhancing Access to Radio Spectrum (EARS) program.

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New paper at RF and Microwave Computer Aided Engineering

The paper titled “Multi-way Impedance-varying Power Dividers for Wideband Applications” by Vijay Devabhaktuni, Khair Alshamaileh and Arjuna Madanayake has been accepted for publication at the International Journal of RF and Microwave Computer Aided Engineering. Congratulations Khair and Vijay!

 

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Keynote Speech at IEEE MERCon 2015

Arjuna Madanayake delivered the Keynote Speech at IEEE MERCon’2015 at the University of Moratuwa, on Wednesday April 8, 2015. Slides.

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Nilanka joins Xilinx in San Jose

ASPC doctoral graduate Nilanka Rajapaksha is moving to San Jose California to join Xilinx. Dr Rajapaksha will be working as a software engineer for the “Device Modeling Group” dealing with propagation delay models for Xilinx FPGA Electronic Design Automation (EDA) tools. Many congratulations to Nilanka. We wish him a bright future in California.

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IMS student sponsorship

Congratulations to ASPC graduate student Viduneth Ariyarathna for being selected for the IEEE 2015 International Microwave Symposium (IMS) +RFIC PhD student sponsorship iniative.

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New paper at IEEE TAP

The paper “Low Noise Amplifier Design Considerations For Use in Antenna Arrays” with Leo Belostotski, Karl Warnick and Bruce Veidt, has been accepted for publication at IEEE Trans. on Antennas and Propagation.

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SDP team is a finalist at Intel-Cornell Cup 2015

The Senior Design Team (Adam, Mark, Tom, Zach) advised by Arjuna Madanayake is a finalist at the 2015 Intel-Cornell Cup Competition.   The “Wirelessly powered elephant tracking device” project will compete at the finals coming up in Florida in late April. Many congratulations for their $1500 award from Intel!

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Three papers accepted at IEEE MerCon’2015

Three papers have been accepted for publication at IEEE Moratuwa Engineering Research Conference (MerCon)’2015, to be held in April 2015, in Sri Lanka. The papers are:

“Aperture-Array Directional Sensing using 2-D Beam Digital Filters with Doppler-Radar Front-Ends ” with Tharindu Randeny, Arindam Sengupta, Yiran Li and Changzhi Li,

“An Overview of Multi-Dimensional RF Signal Processing for Array Receivers” with Chamith Wijenayake, Leonard Bruton and Leo Belostotski, and

“Multi-Beam 8×8 RF Aperture Digital Beamformers Using Multiplierless 2-D FFT Approximations” with Sunera Kulasekara, Chamith Wijenayake, Renato Cintra, Fabio Bayer, and Dora Suarez.

Many congratulations to all!

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Best paper award at CONELECOMP

Congratulations to Vitor, Sunera, Fabio and Renato for winning the best paper award at CONELECOMP for the paper titled “Low-complexity Pruned 8-point DCT Approximations for Image Encoding”.

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New paper accepted at IEEE AP-S

Congratulations to Nilan, Chamith and Len Bruton, for the paper “Electronically Steerable Directed Energy using Space-Time Network Resonant Digital Systems”, which has been accepted for publication and presentation at the 2015 IEEE Antennas and Propagation Symposium (AP-S). The conference is to be held in beautiful Vancouver, BC, Canada, in July.

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PhD Graduate Dr Wijenayake moves to UNSW

The first PhD graduate from the ASPC lab, Dr. Chamith Wijenayake, has started a tenure-track faculty position at the University of New South Wales (UNSW) in Australia. Many congratulations. We wish him all success in his academic work. Dr. Wijenayake’s studies at the University of Akron was supported by the College of Engineering, the National Science Foundation (NSF), and Office of Naval Research (ONR) and IEEE Circuits and Systems Society.

https://research.unsw.edu.au/people/dr-chamith-abewardana-wijenayake

 

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Congratulations to Dr Bahrami for his NSF grant

The ASPC lab is proud of our colleague, Dr Hamid Bahrami, for his grant from NSF from the EARS program. Many congratulations, Hamid.

http://www.uakron.edu/im/news/lab-to-study-how-a-fly-can-boost-your-handhelds-battery

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Paper on microwave a-DFT circuits at IEEE Microwave Symposium (IMS)

The paper titled “Multi-beam 4 GHz Microwave Apertures Using Current-Mode DFT Approximation on 65 nm CMOS” has been accepted for publication at IEEE IMS 2015. The authors are Viduneth Ariyawansa, Sunera Kulasekera, Dora Suarez, Renato Cintra, Fabio Bayer, Kye-Shin Lee, Leo Belostotski, and Arjuna Madanayake. Congratulations!

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Paper on Applebaum adaptive arrays accepted at IEEE RadarCon 2015

The paper “Applebaum Adaptive Array Apertures with 2-D IIR Space-Time Circuit-Network Resonant Pre-Filters” written with Nilan Udayanga, Chamith Wijenayake and Roberto Acosta as been accepted at RadarCon. Congratulations!

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Paper on multi-beam receivers accepted at IEEE RadarCon 2015

Our paper “Multi-Beam Receiver Apertures Using Multiplierless 8-Point Approximate DFT” written with Sunera Kulasekara, Renato Cintra, Fabio Bayer and Dora Suarez, has been accepted at IEEE Radar Conference 2015. The conference will be held in Arlington, Virginia. Congratulations to all authors!

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New paper at IEEE Transactions on Aerospace and Electronic Systems (TAES)

The paper “Digital VLSI Architectures for Beam-Enhanced RF Aperture Arrays” with Sewwandi Wijeratna, Chamith Wijenayake, and Len Bruton has been accepted at IEEE TAES. Many congratulations!

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Two new papers at ISCAS’2015

Papers  “Recent Advances in Multidimensional Systems and Signal Processing: an Overview” with Chamith Wijenayake, Nathan Dornback and Zhiping Lin (NTU, Singapore), and “Tunable Multiband RF CMOS Active Filter Arrays” with Nilan Udayanga, Chamith Wijenayake, Peyman Ahmadi and Leo Belostotski, have been accepted at IEEE International Symposium on Circuits and Systems (ISCAS). Many congratulations!

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New paper at IET Image Processing

The paper “Fast Computation of Residual Complexity Image Similarity Metric Using Low-complexity Transforms” has been accepted at the journal IET Image Processing. Many congratulations to Yves Pauchard, Renato Cintra, and Fabio Bayer.

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Welcome, new graduate students!

The ASPC group warmly welcomes new graduate students Sravan Pulipati, Janith Mendis, Suranga Handagala and Vishwa Seneviratne, for 2015. All the best in your graduate studies.

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New paper with Leo Belostotski accepted at IEEE TVLSI

Congratulations to Leo, Peyman and Taghavi, for the paper titled “A 0.13-μm CMOS Current-Mode All-Pass Filter for Multi-GHz Operation”, which has been accepted for publication at IEEE Trans. on VLSI Systems.

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New paper at CONIELECOMP 2015 conference

The paper titled “Low-complexity Pruned 8-point DCT Approximations for Image Encoding” has been accepted for publication at CONIELECOMP 2015. Congratulations to co-authors Vitor, Renato, Fábio, and  Sunera. 

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Arindam interns at the Greenbank Telescope (GBT)

MS graduate Arindam Sengupta will be interning at the NRAO Robert C. Byrd Radio Telescope at Greenbank, West Virginia (see https://science.nrao.edu/facilities/gbt). He will be working on FPGA designs using CASPER tools for RF digital signal processing. Many congratulations on being selected for this prestigious engineering position.

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New paper at IEEE Signal Processing Letters (SPL)

Many congratulations to Paulo Oliveira, Renato Cintra, Fabio Bayer,  Sunera Kulasekara, and Arjuna Madanayake for their recently accepted paper “A Discrete Tchebichef Transform Approximation for Image and Video Coding”, at IEEE Signal Processing Letters (SPL).

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Nilanka Rajapaksha defends his PhD

Deep congratulations to Nilanka, for successfully defending his PhD dissertation titled “Wave-Digital Filter based Circuits for Beamformers and RF-FPGAs”. Nilanka is the second PhD to complete his doctoral studies from the ASPC lab. The work was supported by the College of Engineering and the Office of Naval Research (ONR) Code 312 Communications and Networking Technology Division.

Click Nilanka Rajapaksha PhD Defense for the slides. Click Nilanka Rajapaksha PhD Dissertation for final thesis.

Nilanka_PhDDefense

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First multiplierless FFT approximation paper accepted at IET Electronics Letters

The paper “Multi-Beam RF Aperture using Multiplierless FFT Approximation” has been accepted for publication at IET Electronics Letters. Many congratulations to Dora, Renato, Fabio and Sunera!

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New paper at IEEE Transactions on Computers

The paper titled “VLSI Computational Architectures for the Arithmetic Cosine Transform” has been accepted for publication at IEEE Trans. on Computers. Many congratulations to Nilanka, Renato, Jithra and Vassil.

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New paper at IEEE Radio Wireless Week

The paper titled “Continuous-Time Mode 2-D IIR Filter Enhanced Time-Delay Linear Aperture Arrays” with Chamith Wijenayake and Leo Belostotski has been accepted for a lecture presentation at IEEE RWS’2015. The conference will be held in San Diego, CA, in early 2015.

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Two full papers at #1 and #23 positions at IEEE Trans. on CAS-I:Regular Papers

Two papers from our research group continues to be mentioned in the most popular list for IEEE Transactions on Circuits and Systems-I:Regular Papers. See details  by clicking here TCAS1Aug.

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Chamith Wijenayake defends his PhD

Chamith Wijenayake has defended his PhD. Many congratulations! Dr Wijenayake is the first PhD from the ASPC group.

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Papers at #1 and #7 in TCAS popularity list

The July 2014 most popular downloads list for IEEE Transactions on Circuits and Systems-I:Regular Papers has two of our papers included. Access full list here.

The position #1 is occupied by “Improved 8-Point Approximate DCT for Image and Video Compression Requiring Only 14 Additions”, and position #2 is occupied by “Precise VLSI Architecture for AI Based 1-D/ 2-D Daub-6 Wavelet Filter Banks With Low Adder-Count”.

Hearty congratulations to our MS students Uma Potluri, Shiva Madhishetty, Amila Edirisuriya and Sunera Kulasekara, and our collaborators in Brazil and Canada.

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Renato Cintra visits ASPC lab

The ASPC group warmly welcomes professor Renato Cintra, from UFPE, Brazil. Dr Cintra will collaborate with ASPC team members for two weeks during his Akron visit. Welcome Renato!

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Viduneth Ariyarathna starts his MS studies

ASPC group welcomes new MS student Viduneth Ariyarathna to the research team.

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Arjuna Madanayake becomes an Associate Editor at CSSP

Dr Arjuna Madanayake accepts an invitation by Professor M.N.S. Swamy to serve as an Associate Editor (AE) for Springer Circuits, Systems and Signal Processing (CSSP) journal.

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Arindam defends his MS thesis

Arindam Sengupta successfully defended his MS thesis titled “Multi-Dimensional Signal Processing using Mixed-Microwave-Digital Circuits and Systems”. Congratulations! The work was in collaboration with Vassil Dimitrov (University of Calgary, Canada), Renato Cintra (UFPE, Brazil), Leo Belostotski (University of Calgary, Canada), Glenn Jones (CalTech/Columbia University), Len Bruton (University of Calgary, Canada) and Roberto Gomez-Garcia (Alcala University, Spain).

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New NSF grant on digital beamformer research

The proposal titled “Collaborative Research: Electronically-Scanned Wideband Digital Aperture Antenna Arrays using Multi-Dimensional Space-Time Circuit-Network Resonance: Theory and Hardware”  addressing  multi-dimensional sparse-array digital filters for beamforming applications has been awarded by NSF. The work is a collaboration with Dr Xin Wang at SUNY Stony Brook.

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Sewwandi defends her thesis

MS student Sewwandi Wijeratna successfully defended her MS thesis. Congratulations! Her thesis is titled FPGA Architectures for Fast-Steerable Beam-Enhanced Digital Aperture Arrays, funded by Office of Naval Research.

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Top accessed paper in IEEE TCAS-I

Our paper with MS students Uma Potluri, Sunera Kulasekara and Amila Edirisuriya, and collaborators Fabio Bayer and Renato Cintra, is ranked #6 in the “Top Accessed” list for IEEE Transactions on Circuits and Systems-I:Regular Papers.

See #6 in http://ieeexplore.ieee.org/xpl/topAccessedArticles.jsp?punumber=8919

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New paper at Multidimensional Systems and Signal Processing

The paper titled   “An orthogonal 16-point approximate DCT for image and video compression” has been accepted at MSSP. The authors include Thiago Silveira, Alice Kozakevicius,  Renato Cintra, Fabio Bayer and Sunera Kulasekara. Congratulations!

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Our 2014 NSF EARS broader impacts workshop in Norfolk VA

2014-07-14 09.16.06 2014-07-14 09.17.41Arjuna Madanayake co-organized a circuits workshop at Norfolk State University (NSU) for regional high-school students as part of the NSF EARS broader impacts program. The UA student assistant team, lead by  MS student Arindam Sengupta, consisted of Sewwandi, Nilan, DeGrafth, Nathan and Julia (high-school intern).

The slides of the workshop is located here.

Website is here.

 

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NSF REU Blog comes alive! Take a look

The official blog of our NSF funded EARS undergraduate research experience program goes live. Check out the blog run by students DeGrafth Palmore and Nathan Dornback (sophomores) and Julia Hariharan (high-school senior) at http://aspcundergradresearch.blogspot.com/

 

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IEEE CASS Outreach Award

The ASPC group has been awarded $8000 by the IEEE Circuits and Systems Society (CASS) for outreach activities involving undergraduates in the NE Ohio region.

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New paper at IEEE Aerospace and Electronic Systems

The paper titled “Systolic-Array Architecture for Steerable Multi-Beam VHF Wave-Digital RF Apertures” with Nilanka Rajapaksha and Dr Len Bruton has been accepted at IEEE Aerospace and Electronic Systems. Congratulations!

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NSF-EARS undergraduate research experience gets underway

NSF REU students Nathan and DeGrafth with high-school intern Julia succeeded in designing, simulating, fabricating and measuring a monopole antenna tuned at 2.4 GHz. They used CST Microwave Studio and J.D. Kraus’s textbook to design the antenna and an Agilent VNA to do the measurements.

Undergraduates and high-school student testing their monopole antenna.

Undergraduates and high-school student testing their monopole antenna.

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New paper at IEEE Circuits and Systems Magazine

The invited review paper “Low-Power VLSI Architectures for DCT/DWT: Precision vs Approximation for HD Video, Biomedical, and Smart Antenna Applications” has been accepted for publication in the IEEE Circuits and Systems society magazine. Deep congratulations to all collaborators and students who coauthored this paper.

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New paper accepted at EUSIPCO’2014

The paper titled “Recent advances in software-defined radars: chirped impulses” is accepted for publication at EUSIPCO’2014. Deep congratulations to lead authors José-María Muñoz-Ferreras  and Roberto Gomez-Garcia at Alcala University, Spain!

 

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NSF funds two research interns at ASPC lab

Nathan Dornback and DeGrafth Palmore started their summer research at the ASPC lab on May 30. This undergraduate research is powered by an NSF REU Supplement to our EARS award.

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ASPC lab publishes findings at IEEE RadarCon’2014

Arindam Sengupta attends IEEE RadarCon’2014 to present a paper on focal plane array signal processing for radar applications. This work is a collaboration with Leo Belostotski (Canada) and Roberto Gomez-Garcia (Spain).

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Four talks at SPIE Defense, Security + Sensing

Several MS students attended and gave four papers at SPIE DSS in Baltimore. Photo shows Sunera, Arindam and Sewwandi. 

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Arjuna Madanayake speaks at ONR Communications Gathering

Dr Arjuna Madanayake gives a seminar on recent progress in digital aperture array research at the 2014 Office of Naval Research (ONR) Code 31 Communications Gathering, held at the Naval Research Lab (NRL) in Washington, DC.

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Team VDAP wins the Entrepreneurship Award

Variable Digital Audio Processor (VDAP) won an honorable mention along with the Entrepreneurship Award at Intel Cornel Cup 2014 competition for their Senior Design Project. Congratulations Team!

Team wins an award at Intel Cornel Cup.

Team wins an award at Intel Cornel Cup.

 

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NSF REU supplement for EARS 2012

Dr Arjuna Madanayake thanks Dr George Haddad and NSF for the REU Supplement for our 2012 EARS Award. The supplement will support two undergraduate students Nathan Dornback and DeGrafth Palmore for a summer of research experience in the Advanced Signal Processing Circuits Lab.

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ASPC PhD Student wins major IEEE scholarship

The ASPC group and the Department of Electrical and Computer Engineering is proud to announce that senior doctoral student Chamith Wijenayake has been selected for the 2014 IEEE Circuits and Systems Society pre-doctoral scholarship. Congratulations Chamith!

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New paper accepted at APS/URSI symposium

The abstract for a new paper on “Analog 2-D IIR Beam Filters for EARS in UAS Ecosystems” has been accepted at the 2014 APS/URSI symposium, to be held in Tennessee, in July 2014. Congratulations to Leo, Chamith, Len and Vijay!

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New paper at IEEE AWPL

The paper “2D-IIR Time-Delay-Sum Linear Aperture Arrays” has been accepted at IEEE Antennas and Wireless Propagation Letters (AWPL). Congratulations to Sewwandi, Chamith, Roberto and Dr Hariharan.

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Two students pass their PhD Proposal Defenses

Chamith Wijenayake and Nilanka Rajapaksha have successfully defended their doctoral proposals this february. Many congratulations. Both students are direct-PhD students under the advice of Dr Madanayake.

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New paper accepted at IEEE Trans. CAS-I:Regular Papers

The invited paper “All-Pass Filter-Based 2-D IIR Filter-Enhanced Beamformers for AESA Receivers” has been accepted at IEEE Trans. on Circuits and Systems-I:Regular Papers, special issue on ISCAS’2013. Many congratulations to Chamith Wijenayake, Leo Belostotski, Len Bruton and Yongsheng Xu!

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Dezarae Holman at CES

See an article on my undergraduate student’s company. Vetta Sounds is building a fully digital amplifier for electrostatic speakers following her undergraduate senior design project.

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Office of Naval Research (ONR) grant funded

Our proposal to ONR on “Rectangular Aperture Arrays based on 3D IIR Space Time Rf to Bits Digital Beam Filters” has been funded! We gratefully acknowledge the support of Program Manager Dr Santanu Das. The project will support three RAs for two years.

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New paper at SPIE DSS

The paper “3D recursive beam-enhanced analog aperture array with improved interference rejection capabilities” was accepted at SPIE DSS. Congratulations to Chamith Wijenayake and Leo Belostotski.

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Arjuna Madanayake speaks at IEEE Radio and Wireless Week

Arjuna Madanayake and Roberto Gomez-Garcia co-organized a workshop on “Recent Advances on Radar Systems for Defense/Security, Localization and other Emerging Applications” at IEEE Radio and Wireless Week, 2014, in Newport Beach, CA.

Dr Madanayake gave a talk on “Fundamental Theory of Digital/Analog Array Radar Receivers using 3-D Multi-Beam Planar-Resonant Filter Banks” at this venue.

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Paper accepted at IEEE Radarcon

The paper titled “A 3-D Spatially-FIR RF Frustum Digital Filter with Microwave Channelization for FPAs” has been accepted at the IEEE 2014 Radar conference, to be held in Cincinnati Ohio. Congratulations to Arindam Sengupta, Leo Belostotski and Roberto Gomez-Garcia!

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Three more papers accepted at SPIE DSS

Three papers accepted at SPIE DSS.

These are “Wideband aperture array using RF channelizers and massively-parallel digital 2D IIR filterbank” with Arindam Sengupta and Roberto Gomez-Garcia, “Low-complexity multiplierless DCT/DST approximations for low-power HEVC digital IP cores” with Fabio Bayer, Sunera Kulasekera, and Renato Cintra, and “FPGA architectures for electronically scanned wideband RF beams using 3D FIR/IIR digital filters for rectangular array aperture receivers” with Sewwandi Wijeratna and Brandon Beale. Many congratulations Team!

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New paper at SPIE Defense, Security + Sensing

New paper accepted at SPIE defense, security + sensing, titled “Direction estimation, source location, and modulation detection for RF sources using steerable 3D IIR beam filters”. Congratulations to Nilan and Chamith.

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Two papers accepted at IEEE ISCAS’2014

Two papers, titled “Directional Cyclostationary Feature Detectors Using 2-D IIR RF Spiral-Antenna Beam Digital Filters” with Nilan, Chamith, Vijay and Mohammad, and “Hexagonal Multi-Beam Analog RF Aperture Array” with Chamith and Len, are accepted at IEEE ISCAS’14. Congratulations to all authors!

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Three MS students graduate in Fall 2013

Deep congratulations to Uma Potluri, Soumya Kondapalli and Shiva Madhishetty, who graduated with MS in Electrical Engineering this fall 2013! These international students (from India) have done extremely well, with seven top-quality journal papers between them.

In the picture, from left: Uma, Soumya, Arjuna and Shiva.

Uma-Shiva-Soumya-Convocation

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New paper at IEEE TCAS1

The paper titled “Precise VLSI Architecture for AI based 1-D/ 2-D Daub-6 Wavelet Filter banks with Low Adder-Count” has been accepted for publication at IEEE Trans. on Circuits and Systems-I:Regular Papers. Congratulations to Shiva, Renato and Vassil!

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Poster from NSF EARS Annual PI conference available on NSF site

Poster summarizing progress at the end of year 1 of NSF EARS project.

The poster presentation at the NSF EARS PI meeting held in October in DC is available on the NSF website.

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Renato Cintra visits ASPC Group

Dr Renato Cintra is back. He will be a visiting professor at the ASPC Lab for two weeks.
Warm welcome, Renato!

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Paper accepted at IET Electronic Letters

Congratulations to Uma, Renato, Vassil and Fabio for the paper “Multiplierless Approximate 4-point DCT VLSI Architectures for Transform Block Coding” which has been accepted at Electronic Letters.

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VDAP makes Intel Cornell Cup finals!

Our Senior Design Team 01, VDAP – Variable Digital Audio Processor has been selected as a finalist in the Cornell Cup embedded systems competition to be held in Florida next year. Congrats to the team (Dylan Fashbaugh, Kyle Lepley, Brian Lesnak, William Lorence) and co-adviser Dr Hariharan.

TeamVDAP-1

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New paper accepted at IEEE TCAS1

The paper “Improved 8-Point Approximate DCT for Image and Video Compression Requiring Only 14 Additions” has been accepted at IEEE Transactions on Circuits and Systems-I:Regular Papers. Congratulations to Uma, Renato, Fabio, Sunera and Amila!

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Sen Xin moves to Old Dominion

Our EARS collaborator Dr Sen Xin moves to Old Dominion University. See Dr Xin’s new research page by clicking here. All the best for a bright future Sen!

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Two new students join the ASPC Group.

Sunera Kulasekara and Tharindu Randeny joined the ASPC Group this Fall. A warm welcome!

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Nilan Udayanga joins ASPC group.

Nilan Udayanga joined the ASPC Group as a research assistant for the NSF project on Enhancing Access to Radio Spectrum (EARS). Welcome Nilan!

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New website for ASPC Lab comes online.

Hello and welcome to Dr Arjuna Madanayake’s research homepage. Old news items for the period December 2009 – August 2013 is given below.

August 2013
The paper “Reconfigurable Phase-Linearizer for 2-D IIR RF-to-Bits Antenna-Array Digital Beam Filters” is accepted at IEEE ICICS‘2013 to be held in Taiwan. Congrats Sewwandi, Len and Hari!

The paper with Chamith, Mohammad, Leo, Vijay, Rimesh and Len titled “Electronically Scanned RF-to-Bits Beam Aperture Arrays Using 2-D IIR Spatially Bandpass Digital Filters”, has been accepted at Multi-Dimensional Systems and Signal Processing. Congratulations!

Two invited talks given by Roberto Gomez Garcia, U. of Alcala (Spain), (slides) and Firas Hassan, ONU (slides).

The paper  “Space-Time Spectral White Spaces in Cognitive Radio: Theory, Algorithms and Circuits” has been accepted at IEEE JETCAS. Congratulations to John, Chamith and Len!

Professor Roberto Gomez-Garcia from Alcala University, Spain, visits the research group for 1 week.

July 2013
Our paper “A 2-D Signal Processing Model to Predict the Effect of Mutual Coupling on Array Factor” has been accepted for publication at IEEE Antennas and Wireless Propagation Letters (AWPL). Congratulations to Chamith, John, Leo and Len.

Congratulations to Shiva, Dale, Renato and Vassil for the paper “Algebraic Integer Architecture With Minimum Adder Count for the 2-D Daubechies 4-tap Filters Banks”, which has been accepted for publication at Multidimensional Systems and Signal Processing (MSSP).

The paper titled “Systolic Architectures for RF Antenna Apertures using Integral-form 2-D IIR Beam Filters” by Soumya Kondapalli, Arjuna Madanayake and Len Bruton, is accepted at IEEE PACRIM’2013.

Dr Makarand Deo (NSU) gives a seminar on bioelectromagnetic modeling of the human heart.
Uma Potluri and Soumya Kondapalli have defended their masters. Many congratulations ladies!

June 2013
Arjuna and Chamith attends the 2013 Ohio Innovation Sensor Summit in Dayton, Ohio to present a poster on digital steerable aperture algorithms.
Randeel Wimalagunaratne defends his thesis. Congrats!

Organized and delivered a 1-day seminar for high school seniors from under represented groups at Norfolk State University, Virginia, as part of our NSF-EARS broader impacts plan.
Conducted a 1-week electronics workshop for high-school girls in Akron area.

The paper “VLSI Architecture for 4D Depth Filtering” has been accepted for publication in the journal Signal, Image and Video Processing. Congratulations to Randeel, Don, Len and Renato.

May 2013
Elizabeth Hammel joins as an undergraduate research student as part of our NSF EARS project. Welcome!

Arjuna Madanayake attends IEEE ISCAS‘2013 and the IEEE CAS Education Workshop in Beijing. The ASPC group published two papers at this meeting.
Arjuna Madanayake speaks at the 2013 Communications Gathering at NRL in Washington, DC as part of the progress review for his ONR grant.

Congratulations to Sewwandi and Len for the paper titled “FFT-Based Phase Compensation of 2-D Beam Digital Filters for Electronically Steerable RF Arrays” and congratulations to Leo and his Calgary based team for our joint paper titled “10GHz Current-Mode 1st order and 2nd-Order Allpass Filters on 130nm CMOS”. Both papers are accepted at IEEE MWSCAS‘2013 to be held in Columbus, Ohio, this year.

The paper titled “A Single-Channel Architecture for Algebraic Integer Based 8×8 2-D DCT Computation” has been accepted at IEEE Transactions on Circuits and Systems for Video Technology. Congratulations Amila, Nilanka, Renato and Vassil.

Arjuna Madanayake and Chamith Wijenayake attends SPIE Defense Security + Sensing in Baltimore, MD, to
give two papers on EARS/cognitive radio and radar sensor technologies.

April 2013
The paper titled “Approximate Realization of Fractional-Order 2-D IIR Frequency-Planar Filters” with Jay Adams and Len Bruton has been accepted for publication at IEEE Journal of Emerging and Selected Topics in Circuits and
Systems (JETCAS) Special Issue on Fractional Order Systems.

The paper titled “Integral Form 4-D Light Field Filters using Xilinx FPGAs and 45 nm CMOS Technology” is accepted for publication in Multidimensional Systems and Signal Processing (MSSP). Congratulations to Randeel, Don, Chamith and Len.

The SDP advised by Dr Arjuna Madanayake is featured in local media. Congratulations to Team “Precision Pool Aid”. See here  for the news story and video and click here for the TV interview with Jim Tressel, Vice President Strategic
Development.

February 2013
Arjuna Madanayake attends the DARPA SSPARC conference in Arlington, VA.

Judith, Uma, Soumya and Sewwandi present at the Ohio Celebration for Women in Computing (OCWiC‘2013).
Congratulations to Uma for winning Best Graduate Poster for her masters work on “Field Programmable Custom Computing Machines for DCT/DST and DFT/FFT Algorithms”. Click here for the winning poster!

The paper by Nilanka, Amila, Arjuna, Renato, Ihab, Denis, and Vassil titled “Asynchronous Realization of Algebraic Integer based 2-D DCT using Achronix Speedster SPD60 FPGA” has been accepted for publication at the Hindawi Journal of Electrical and Computer Engineering Special Issue on Hardware Implementation of DSP Algorithms.

January 2013
Two papers are accepted at the SPIE defense conference to be held in Baltimore in 2013.
Congratulations to Chamith, Judith, Uma and Dale a on the accepted paper titled “Low-complexity algorithms for RF source localization and spatio-temporal directional spectrum sensing with applications in cognitive radio”, at the “SPIE Wireless Sensing, Localization, and Processing VIII”.

Congratulations to Chamith, Thushara, Leo, Yonhsheng and Len for the paper titled “Rejection of interference and near-field coupled LNA-noise on FPA-fed multibeam dish antennas using 3-D analog filters” at the “SPIE Radar Sensor Technologies XVII”.

Amit Rai and Sewwandi Wijeratne joins the research group. A warm welcome to them both.

December 2012
The following papers have been accepted for lecture presentation at the IEEE 2013 Intl. Symp. on Circuits and Systems (ISCAS‘2013) to be held in Beijing, China. The papers are

“DOA-Estimation and Source-Localization in CR-Networks Using Steerable 2-D IIR Beam Filters” with Chamith, Len and Vijay Devabhaktuni, and

“A Steerable DC-1 GHz All-Pass Filter-Sum RF Space-Time 2-D Beam Filter in 65 nm CMOS” with Chamith, Len, Leo and Yongsheng Xu. Congratulations!

The paper entitled “Multidimensional (MD) Circuits and Systems For Emerging Applications Including Cognitive Radio, Radio Astronomy, Robot Vision and Imaging” with Chamith Wijenayake, Len Bruton, Thushara Gunaratne, Don Dansereau and Stefan Williams has been accepted for publication in the IEEE CAS Society Magazine.

Three posters and a talk are accepted for presentation at the Ohio Celebration of Women in Computing, to be held in February 2013. Congratulations Soumya, Uma, Judith and Sewwandi!

Arjuna Madanayake attends the AHEAD working group workshop on Autonomy in Dayton, Ohio.

Amila Edirisuriya defends his Masters thesis. Congratulations Amila!

November 2012
Dr Yves Pauchard from Robarts Research Institute, Canada, visits the ASPC Group and gives a talk. Slides.
Dr Cintra gives an invited speech for the research group on SAR image processing. Slides.

Professor Renato Cintra from UFPE, Brazil joins the ASPC Group as a visiting scholar. Warm welcome!

October 2012
The kick-off meeting for our NSF EARS research is held at Norfolk State University in Virginia.

Our proposal to ONR Communications Division Code 312 on Advanced Aperture-Array Beamformers based on MD Signal Processing has been recommended for funding. We thank our program managers Santanu Das and Douglas Crowder for their support.

Microwave Office, Analog Office, and MEEP operational in the lab.

The paper entitled “Towards RF analog IC realization of wave-discrete filters on 65nm CMOS” with Nilanka, Yongsheng, Len, Leo, and Amila, as well as the paper entitled “A Multiplication-free Digital Architecture for 16×16
2-D DCT/DST Transform with Applications in H.265 Reconfigurable Video Codecs” with Amila, Renato and Fabio, have been accepted for publication at the IEEE-Israel conference 2012. Congratulations all!

September 2012
Judith Amarasekera joins as an undergraduate research intern. She will be investigating digital hardware filter algorithms for low-complexity spectrum sensing with applications in cognitive radios. Welcome Judith!

Rob Green from the University of Toledo visits to give a seminar on “Central Force Optimization” from a computer science perspective.

The paper with Leo Belostotski and Len Bruton titled “Wideband LNA with active -C element” has been accepted for publication at IEEE Microwave and Wireless Components Letters. Congratulations!

August 2012
Awarded! Our first NSF grant through the Enhancing Access to the Radio Spectrum (EARS) Program via the EECS directorate. We are grateful to the NSF, our program director Dr. G. Haddad and the American taxpayer for this valuable opportunity for exploring basic science. Click here for details.

Congratulations to Uma, Renato and Fabio, for their accepted paper “Multiplier-free DCT approximations for RF multi-beam digital aperture-array space imaging and directional sensing”, to appear in IoP Measurement Science and Technology.

Arjuna Madanayake will be offering Embedded Systems Interfacing for the first time, and Advanced Array Signal Processing (graduate level) for the third time, this fall.

Arjuna, Chamith, Soumya and Nilanka drive down to NRAO Green Bank, WV to attend the 2012 CASPER workshop. See our outreach page for slides.

The paper entitled “VLSI Architectures for the 4-tap and 6-tap 2-D Daubechies Wavelet Filters using Algebraic Integers” has been accepted for publication at IEEE Trans. on Circuits and Systems-I:Regular Papers. Congratulations Shiva, Renato, Dale and Vassil!

Arindam Senguptha and Bill Miller join the ASPC group. Welcome guys!

Dezarae Holman and her team wins the student paper award at IEEE MWSCAS‘2012 in Boise, Idaho, for their undergraduate research paper on direct digital amplifiers for ESLs. Many congratulations! Slides. The project was advised by Arjuna Madanayake and Malik Elbuluk as part of their efforts to integrate research with undergraduate teaching of design.

July 2012
The invited paper “A digital hardware fast algorithm and FPGA-based prototype for a novel 16-point approximate DCT for image compression applications” was accepted for publication at IoP Measurement Science and Technology (MST). Congratulations to Amila, Fabio and Renato!

The paper “Broadband Multiple Cone-Beam 3D IIR Digital Filters Applied to Planar Dense Aperture Arrays” with Chamith and Len is accepted for publication at IEEE Trans. on Antennas and Propagation (TAP). Congratulations!

John Kota gives a seminar on his summer research on broadband antenna array mutual coupling effects.

Professor Sean Hum, from the University of Toronto, Canada, visits the research group.

June 2012
The paper titled “Digital Architectures for UWB Beamforming using 2-D IIR Spatio-temporal Frequency-Planar Filters” authored with Soumya Kondapalli and Len Bruton is accepted for publication at Hindawi Intl. Journal of Antennas and Propagation Special Issue on Beamforming Networks.

The ASPC Group hosts 4 female students from high schools (K-12) for a 4-day summer program on the design of an  audio power amplifier. See the Outreach page for photos!

May 2012
Congratulations to DT-06 team John, Dezarae, Kyle, Eric and Malik, for the paper “High-Voltage Class-D Direct-Drive Audio Amplifier for Electrostatic Loudspeakers” that has been accepted for publication at IEEE 2012 Mid-West Symposium on Circuits and Systems (MWSCAS‘2012).

Arjuna and Chamith attends IEEE 2012 Intl. Symp. on Circuits and Systems (ISCAS‘2012) in Seoul, South Korea, to give five papers.

Arjuna gives a talk at the Office of Naval Research (ONR) in Washington,DC, titled “Ultra-Wideband Aperture Arrays using Multi-Dimensional DSP” at the ONR 2012 Communications Gathering. Invited by Dr Santanu Das.

April 2012
Nilanka Rajapaksha wins best RA award and Soumya Kondapalli wins a best TA award.

Senior design team “DT06 Digital Amplifier for ESL” is placed 3rd place in this years SDPs. Congratulations to all. Winners announced this Faraday Evening.

Senior Design Team 06, Digital Amplifier for ESLs make LaunchTown Finals. Congratulations to Dezarae Holman
John Kota, Kyle Wilson and Eric Matas. The project is supervised by Dr Arjuna Madanayake and Dr Malik Elbuluk. The graduate student mentor is Chamith Wijenayake. Well done.

New paper! Our submission titled “Continuous-time 2D IIR Beam Filters” has been accepted for publication at
IEEE Trans. on Circuits and Systems-II:Express Briefs. Congratulations to Mona, Chamith and Len.

Our paper at IEEE CORAL 2012 titled “Directional Spectrum Sensing using Tunable Multi-D Space-Time Discrete
Filters” has been accepted for publication. Congratulations Chamith, Nghi, Sean, Len and Todor.
New: paper was nominated for a best paper award! Slides.

March 2012
Congratulations to Amila, Renato, Vassil and Jithra. Our paper entitled “VLSI Architecture for 8-Point AI-based  Arai-DCT having Low AT Complexity and Power at Improved Accuracy using 40 nm FPGA and 65 nm Standard    Cells” is accepted for publication at the Journal of Low Power Electronics and Applications, Special Issue on Recent Developments.
The paper titled “2D Space-time Wave-Digital Multi-fan Filter Banks for Signals Consisting of Multiple Plane Waves” with Nilanka and Len Bruton has been accepted for publication at Circuits, Systems and Signal Processing (CSSP). Congratulations!!

February 2012
Our paper entitled “Block-Parallel Systolic-Array Architecture for 2-D NTT-Based Fragile Watermark Embedding”
has been accepted for publication at Parallel Processing Letters (PPL). Congratulations to Renato, Vassil and Len.

January 2012
Congratulations to Nilanka for passing his doctoral qualifier.

The graduate-course Fast Algorithms and VLSI for Digital Signal Processing is offered for the first time.

The following five papers are accepted at the IEEE Intl. Symp. on Circuits and Systems (ISCAS‘2012) to be held in Soul, Korea next May. Many thanks and congratulations!

“Teaching Freshmen VHDL-Based Digital Design”, with Chamith, Rimesh, Jay Adams, Joan Carletta, Jim Grover, Tom Hartley and Tokunbo Ogunfunmi (Santa Clara University, CA).
“A Combined Approach to Research and Graduate-Level Teaching of Multidimensional Signal Processing, Circuits and Systems” with Len Bruton.
“Error-Free VLSI Architecture for the 2-D Daubechies 4-Tap Filter Using Algebraic Integers” with Shiva, Renato, Dale, and Vassil.
“A Systolic-Array Architecture for First-Order 4-D IIR Frequency-Planar Digital Filters” with Randeel, Don and Len.
“Discrete Space Continuous Time 2D Delay Block Using 2D All-Pass Frequency Planar Networks” with Chamith, Yong Sheng, Leo and Len.

December 2011
An invited paper based on our published work at IEEE ISCAS‘2011 is accepted for publication at IEEE TCAS1 Special Issue on ISCAS‘2011. The paper is titled “RF Analog Beamforming Fan Filters Using CMOS All-pass Time Delay Approximations”. Congrats to Chamith, Yongsheng, Leo and Len!

Congratulations Rimesh, for the successful defense of your Masters thesis. The thesis has lead to 2 published IEEE conference papers and an accepted paper in IEEE Tran. on VLSI systems. Great job!

November 2011
Computer Simulation Technology (CST) Microwave Studio, a distributed parallel processing EM Simulator, is up and running in the ASPC lab.

The paper with Renato, Nilanka, Amila, Denis, Len and Vassil titled “A Row-parallel 8×8 2-D DCT Architecture Using Algebraic Integer Based Exact Computation” has been accepted for publication at IEEE Trans. on Circuits and Systems for Video Technology [5-year impact factor = 3.012]. Congratulations on your achievement !

October 2011
The paper with Rimesh, Len and Jithra titled “Synthesis and Array Processor Realization of a 2D IIR Beam Filter for Wireless Applications” is accepted for publication at IEEE Trans. on VLSI Systems [5-year impact factor=1.5].
Congratulations to the team!!

Our blog goes online at http://www.aspcgroup.net

September 2011
The paper with Thushara Gunaratne and Len Bruton titled “Reducing The Multiplier-Complexity of Massively-Parallel Polyphase 2D IIR Broadband Beam Filters”  is accepted for publication at Circuits, Systems and Signal Processing (CSSP). Impact Factor=0.752.

The graduate-course Advanced Array Signal Processing is offered for the second time at the University of Akron.

August 2011
Rimesh attends the IEEE Midwest Symposium on Circuits and Systems to give 4 presentations.

July 2011
Chamith and Rimesh attend the 6th NAIC/NRAO summer school on single-dish radio astronomy. Seehttp://www.nrao.edu/meetings/sds6/

A paper with Vijay Devabhaktuni et al is accepted for publication at the International Journal of RF and Microwave Computer-Aided Engineering (Wiley-Blackwell).
The paper titled “A New Class of Spatially-Discrete Time-Continuous 2D IIR Filters Based on Wave-Digital-Filter Theory” with Len, Leo, Nilanka, Chamith and Kye-Shin is accepted at IEEE PACRIM‘2011.

June 2011
Nilanka Rajapaksha delivers a review seminar on 2D wave-digital filters at the University of Moratuwa. Slides

May 2011
The following papers are accepted for publication at IEEE N-Dimensional Systems Conference, to be held in France, 2011:

“Recent Progress on Analog/Digital VLSI 2D Filter Circuits For Beamforming Antenna Arrays” with Chamith, Len and Leo.
“Discrete-Space Continuous-Time Analog Circuits for Spatially-Bandpass 2D IIR Beam Filters” with Rimesh, Mona Maini and Len Bruton.
“Modeling The Effects of Electromagnetic Inter-Element Coupling in Broadband Antenna Arrays using Multidimensional DSP” with Leo, Michael Petersson, and Len.

Arjuna Madanayake gives 4 papers at IEEE Intl. Symposium on Circuits and Systems (ISCAS‘2011) in Rio, Brazil.
Jithra Adikari speaks on the topic of “High speed computer arithmetic hardware for elliptic curve cryptography”.Slides.

The following papers have been accepted for publication at IEEE MWSCAS‘2011 to be held in Korea, this August:

“An Asynchronous Array Architecture for 16×1 DCT-4/DST-4 on a 65nm Achronix SDP60 FPGA” with Dale Mugler and Nilanka Rajapaksha.
“An Architecture for a 7×7-bit Multiple-Radix Multiplier Building Block” with Jithra Adikari, Amila Edirisuriya, and Vassil Dimitrov.
“A 2D IIR Spatially-Bandpass Antenna Beamformer on a 65nm Achronix SPD60 FPGA” with Rimesh Joshi and Len Bruton.
“Design and FPGA-Implementation of 1st-Order 4D IIR Frequency-Hyperplanar Digital Filters” with Randeel Wimalagunaratne, Don Dansereau, and Len Bruton.

Dr Jithra Adikari, PDF at Dept. of ECE, University of Waterloo, Canada, is visiting the ASPC Group for 1-week.
Welcome to UAkron, Jithra.

April 2011
Dr Vijay Devabhaktuni from the University of Toledo visits the research group and gives an invited talk on
“Multidisciplinary and Sponsored Graduate Research Program at the Computer Aided Design and Simulation Lab”.
Rimesh Man Joshi wins the Faraday TA of the year! Congratulations!!
Rimesh and Chamith are selected for the 2011 NRAO Summer School in single-dish radio astronomy,
Chamith Wijenayake wins the university-wide CUGSR graduate student research award.
Congratulations on your achievements.

February 2011
Dr Todor Cooklev, Director of the Wireless Technologies Center at Purdue-Indiana, delivers a research seminar on “Modern Wireless Systems” as well as a guest lecture in Dr Madanayake’s digital logic design class.

Our joint paper with Sean Hum at the University of Toronto and Len Bruton at the University of Calgary, Canada, entitled
“Effects of Quantization in Systolic 2D IIR Beam Filters on UWB Wireless Communications”  has been accepted for publication
at the Journal of Circuits, Systems, and Signal Processing (CSSP). Congratulations Sean and Len!

January 2011
Chamith Wijenayake delivers an invited seminar and paper at the Department of Electronic and Telecommunication Engineering, University of Moratuwa, Sri Lanka, entitled “Analog/Digital VLSI 2D Beam/Fan Filter Circuits For UWB Smart Antenna Arrays: A Review”. The paper is co-authored by Arjuna Madanayake, Leo Belostotski, and Len Bruton.

The ASPC group completes one year of existence.
Uma, Randeel, Amila and Shivakumar join as Masters students.  Welcome to the team !

December 2010
The following papers have been accepted for publication at the next IEEE Intl. Symposium on Circuits and Systems ISCAS‘2011, the flagship conference in the circuits area, to be held in Rio, Brazil next May.

“Analog 2D Fan Filters from Discrete Domain Transfer Functions” with Leo, Chamith and Len.
“Asynchronous-QDI 2D IIR Digital Filter Circuits” with Nilanka.
“Antenna-Array 2D-IIR Digital Filters for Carrier-Modulated Frequency-Agile and Cognitive Wireless
Systems” with Hamid and Len.
“Algebraic Integer Based 8×8 2-D DCT Architecture for Digital Video Processing” with Renato, Vassil, Denis and Len.

Well done! and thanks for all your hard work!

Nilanka attends IEEE ICM‘2010 in Cairo, Egypt to give two papers. See September news for details.

November 2010
Arjuna Madanayake delivers an invited seminar at the Department of EECS, University of Toledo, Ohio.
Topic: Fast Spacetime Algorithms and VLSI Circuits for Wideband RF Array Processing. Invited by Professor Vijay Devabhaktuni.

Arjuna Madanayake is appointed as an Adjunct Assistant Professor at the Department of ECE, University of Calgary, Canada, starting January 2011.

October 2010
The Cadence VLSI tools with Mosis CMOS kit, Mentor Precision, and Xilinx ISE is up and running on our Linux server.
Chamith attends IEEE SIPS‘2010 in California and gives a paper. Slides

September 2010
Arjuna and Renato visit the Wireless Technology Center at Indiana University – Purdue University, Fort Wayne, IN.

Renato delivers a guest lecture on trigonometric transforms, fast algorithms, and number-theory for the graduate course “Advanced Array Signal Processing”. Thanks for the excellent lecture!

The joint paper with Dr. Len Bruton titled “Systolic-Array 3D Wave-Digital Beam Filters” is accepted for future publication at the IEEE 2010 Asia Pacific Symposium on Circuits and Systems (APCCAS‘2010) to be held in Malaysia, in December 2010.

Nilanka’s paper on “Raster-Scanned Wave-Digital Filter Architectures for Multi-Beam 2D IIR Broadband Beamforming” (with Chamith and Len Bruton) is accepted for presentation at IEEE ICM‘2010 in Cairo, Egypt this December. Great job, Nilanka and Chamith!

The joint paper with our collaborators Ranga Rodrigo, Len Bruton, and 4 undergraduate researchers at the University of Moratuwa, Sri Lanka, titled “Scanned-Array Audio Beamforming using 2nd- and 3rd-Order 2D IIR Beam Filters on FPGA” is accepted for presentation at IEEE ICM‘2010 in Cairo, Egypt. Well done, team.

Renato Cintra (with Vassil Dimitrov as co-author) delivers an invited lecture on his recent contribution on “An Arithmetic Method for the Discrete Fourier Transform”. Slides are available here.n

The paper “Massively-parallel systolic-array architectures for 2D IIR polyphase space-time plane-wave beam digital filters”  (with Thushara Gunaratne and Len Bruton) has been accepted for future publication at the International Journal of Circuit Theory and Applications (CTA) [Impact Factor =2.011].

Professor Renato Cintra, Professor Adjunto at the Department of Statistics Federal University of Pernambuco (UFPE), Brazil, joins the group for the month of September. A warm welcome to Akron Renato!

August 2010
Arjuna Madanayake delivers invited seminar and paper titled “Multidimensional-DSP Algorithms and Hardware Architectures for Widefield Aperture-Arrays Aimed at The Square Kilometer Array (SKA) Project”, at the Department of Electronic and Telecommunication Engineering, University of Moratuwa, Sri Lanka.

Chamith presents a paper at IEEE 2010 MidWest Symposium on Circuits and Systems (MWSCAS) in Seattle.

July 2010
Professor Luidthardt Wolfram visits the Swiss students in Akron. Welcome Wolfram!

June 2010
David Zanella and Adrien Chassot from Switzerland start their internship at the University of Akron. Adrien will be working on a custom board for multidimensional-DSP using Achronix FPGA technology. David will work on a client-server interface to our filter algorithms database using Matlab NE.

Chamith’s paper “FPGA Prototypes of Differential-Form 2D-IIR Systolic-Array DSP Architectures for Multi-Beam Plane-Wave Filters” has been accepted for publication at IEEE SIPS‘2010 to be held in California. Congratulations Chamith!

May 2010
Arjuna Madanayake presents a paper at ISCAS‘2010 in Paris, France.

The group is visited by Achronix Semiconductor FAE Sujata Mahidhara for a 1-day training session.

Chamith’s paper “Systolic Array Architecture for 2D IIR Wideband Dual-Beam Space-Time Plane-Wave Filters” (with Dr Len Bruton) has been accepted for publication at IEEE Midwest Symposium on Circuits and Systems (MWSCAS‘2010) in August. Congratulations Chamith!

April 2010
Dan, Eric, and Matt joins the group as undergraduate summer researchers. Jimmy will start in the Fall. Welcome guys !

Rimesh joined the group as an MSc student. Welcome Rimesh!

Awarded a Firestone Research Initiatives grant.

January 2010
The paper titled “Multidimensional Raster-Scanned LC-Ladder Wave-Digital Filter Hardware for Directional Filtering in Space-Time” (with Dr. Len Bruton) has been accepted for publication at the IEEE 2010 International Symposium on Circuits and Systems (ISCAS’2010). Paris, here we come!

Nilanka and Chamith joined the research group as MSc students. Welcome!

December 2009    Arjuna Madanayake joined the University of Akron.

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