SiPS

SiPS

Signal Processing Systems Group



Latest research work and publications:

International Journals

Accepted
Exploiting Task and Data Parallelism for Advanced Video Coding on Hybrid CPU+GPU PlatformsSvetislav Momcilovic, Nuno Roma and Leonel SousaJournal of Real-Time Image Processing, Springer, to appear in 2015.
Implementation and Performance Analysis of Efficient Index Structures for DNA Search Algorithms in Parallel PlatformsNuno Sebastião, Gustavo Encarnação and Nuno RomaJournal on Concurrency and Computation: Practice & Experience, Wileys, to appear in 2015.
Morphable Hundred-Core Heterogeneous Architecture for Energy-Aware ComputationNuno Neves, Henrique Mendes, Ricardo Chaves, Pedro Tomás and Nuno RomaIET Computers & Digital Techniques, The Institution of Engineering and Technology (IET), to appear in 2015.
Multi-Core SIMD ASIP for Next Generation Sequencing and Alignment Biochip PlatformsNuno Neves, Nuno Sebastião, David Matos, Pedro Tomás, Paulo Flores and Nuno RomaIEEE Transactions on Very Large Scale Integration Systems, IEEE, to appear in 2015.
Reverse Converter Design via Parallel-Prefix Adders: Novel Components, Methodology and ImplementationsAzadeh Zarandi, Amir Molahosseini, Mehdi Hosseinzadeh, Saeid Sorouri, Samuel Antão and Leonel SousaIEEE Transactions on Very Large Scale Integration (TVLSI) Systems, to appear in 2014.
Arithmetic-based binary-to-RNS converter modulo {2^n±k} for jn-bit Dynamic RangePedro Matutino, Ricardo Chaves and Leonel SousaIEEE Transactions on Very Large Scale Integration (TVLSI) Systems, to appear in 2014.
Method for Designing Efficient Mixed Radix MultipliersHector Pettenghi, Frederico Pratas and Leonel SousaCircuits, Systems & Signal Processing, Springer, to appear in 2014.
Real-Time Implementation of Remotely Sensed Hyperspectral Image Unmixing on GPUsSergio Sanchez, Rui Ramalho, Leonel Sousa and Antonio PlazaJournal of Real-Time Image Processing, Springer, to appear in 2014.
Real-Time Processing of Multi-Frequency Eddy Currents Testing Signals: Design, Implementation and EvaluationLuís Rosado, Moises Piedade and Pedro RamosIEEE Transactions on Instrumentation and Measurement, to appear in 2014.
Magnetic tunnel junction based eddy current testing probe for detection of surface defectsFilipe Cardoso, Luís Rosado, Ricardo Ferreira, E. Paz, Susana Cardoso, Pedro Ramos, Moises Piedade and Paulo FreitasJournal of Applied Physics, to appear in 2013.
2014
An Efficient Scalable RNS Architecture For Large Dynamic RangesPedro Matutino, Ricardo Chaves and Leonel SousaJournal of Signal Processing Systems, Springer, vol. 77, n. 1, pp. 191-205, October 2014.
A Flexible Architecture for Modular Arithmetic Hardware Accelerators based on RNSSamuel Antão and Leonel SousaThe Journal of Signal Processing Systems, Springer, vol. 76, n. 3, pp. 249-259, September 2014.
Efficient sign identification engines for integers represented in the RNS extended 3-moduli set {2^n-1, 2^(n+k), 2^n+1}Leonel Sousa and Paulo MartinsElectronics Letters, IET, vol. 50, n. 16, pp. 1138 –1139, July 2014.
Unified Transform Architecture for AVC, AVS, VC-1 and HEVC High-Performance CodecsTiago Dias, Nuno Roma and Leonel SousaEURASIP Journal on Advances in Signal Processing, Springer, vol. 2014, n. 1, July 2014.
Cache-Oblivious Parallel SIMD Viterbi Decoding for Sequence Search in HMMERMiguel Ferreira, Nuno Roma and Luís RussoBMC Bioinformatics, BioMed Central, vol. 15, n. 165, pp. 1-13, May 2014.
A Neuronal Signal Detector For Biologically Generated Magnetic FieldsTiago Costa, Moises Piedade, José Germano, José Amaral and Paulo FreitasInstrumentation and Measurement, IEEE Transactions on, January 2014.
Cache-aware Roofline model: Upgrading the loftAleksandar Ilic, Frederico Pratas and Leonel SousaIEEE Computer Architecture Letters, vol. 13, n. 1, pp. 21-24, January 2014.
Dynamic Load Balancing for Real-time Video Encoding on Heterogeneous CPU+GPU SystemsSvetislav Momcilovic, Aleksandar Ilic, Nuno Roma and Leonel SousaIEEE Transactions on Multimedia, IEEE, vol. 16, n. 1, pp. 108 - 121, January 2014.
Efficient Method for Designing Modulo {2^{n}±k} MultipliersHector Pettenghi, Sorin Cotofana and Leonel SousaJournal of Circuits, Systems, and Computers, World Scientific Publishing, vol. 23, n. 1, January 2014.
2013
Method to Design General RNS Reverse Converters for Extended Moduli SetsHector Pettenghi, Ricardo Chaves and Leonel SousaIEEE Transactions on Circuits and Systems II, n. 12, pp. 877-881, December 2013.
MoteIST: A Modular Low-Power Approach to Wireless Sensor Networks NodesJosé Catela, Moises Piedade and Rui RochaInternational Journal of Adaptive, Resilient and Autonomic Systems (IJARAS), IGI-Global, vol. 4, n. 3, pp. 82-101, December 2013.
Smart Ultra Low Power Energy Harvesting SystemMoises Piedade, Rui Rocha, José Catela and Alexandre CorreiaInternational Journal of Adaptive, Resilient and Autonomic Systems (IJARAS), IGI -Global, vol. 4, n. 3, pp. 102-118, December 2013.
A Fast LDPC Encoder/Decoder for Small/Medium CodesJosé Vaz and José GeraldMicroelectronics Journal, Elsevier, vol. 44, n. 10, pp. 888-896, October 2013.
On the Design of RNS Reverse Converters for the Four-Moduli Set {2^n+1, 2^n-1, 2^n, 2^{n+1}+1}Leonel Sousa, Samuel Antão and Ricardo ChavesIEEE Transactions on Very Large Scale Integration (TVLSI) Systems, vol. 21, n. 10, pp. 1945-1949, October 2013.
A Randomized Multi-modulo RNS Architecture for Double-and-Add to prevent Power Analysis Side Channel AttacksJude Ambrose, Hector Pettenghi, Darshana Jayasinghe and Leonel SousaIET Circuits, Devices & Systems, IET journals, vol. 7, n. 5, pp. 283 - 293, September 2013.
A Lab Project on the Design and Implementation of Programmable and Configurable Embedded SystemsLeonel Sousa, Samuel Antão and José GermanoIEEE Transactions on Education, vol. 56, n. 3, pp. 322-328, August 2013.
Geometric Optimization of a Differential Planar Eddy Currents Probe for Non Destructive TestingLuís Rosado, João Gonzalez, Telmo Santos, Pedro Ramos and Moises PiedadeSensors and Actuators A: Physical, vol. 197, pp. 96-105, August 2013.
Configurable and Scalable Class of High Performance Hardware Accelerators for Simultaneous DNA Sequence AlignmentNuno Sebastião, Nuno Roma and Paulo FloresJournal on Concurrency and Computation: Practice & Experience, Wileys, vol. 25, n. 10, pp. 1319–1339, July 2013.
Integration of TMR Sensors in Silicon Microneedles for Magnetic Measurements of NeuronsJosé Amaral, Vítor Pinto, Tiago Costa, João Gaspar, Ricardo Ferreira, Elvira Paz, Susana Cardoso and Paulo FreitasMagnetics, IEEE Transactions on, vol. 49, n. 7, pp. 3512 - 3515, July 2013.
RNS Reverse Converters for Moduli Sets with Dynamic Ranges up to (8n+1)-bitHector Pettenghi, Ricardo Chaves and Leonel SousaIEEE Transactions on Circuits and Systems I, IEEE Circuits and Systems Society, vol. 60, n. 6, pp. 1487-1500, June 2013.
Measuring brain activity with magnetoresistive sensors integrated in micromachined probe needlesJosé Amaral, João Gaspar, Vitor Pinto, Tiago Costa, Nuno Sousa, Susana Cardoso and Paulo FreitasApplied Physics A, vol. 111, n. 2, pp. 407-412, May 2013.
Defect Characterization with Eddy Currents Testing using Non-Linear Regressions Feature Extraction and Artificial Neural NetworksLuís Rosado, Pedro Ramos, Fernando Janeiro and Moises PiedadeIEEE Transactions on Instrumentation and Measurement, vol. 62, n. 5, pp. 1207-1214, April 2013.
Scalable Unified Transform Architecture for Advanced Video Coding Embedded SystemsTiago Dias, Sebastián López, Nuno Roma and Leonel SousaInternational Journal of Parallel Programming (IJPP), Springer, vol. 41, n. 2, pp. 236-260, April 2013.
Dealing with Unknown Impedance and Impulsive Noise in the Power Line Communications ChannelPaulo Lopes, João Pinto and José GeraldIEEE Transactions on Power Delivery, IEEE, vol. 28, n. 1, pp. 58 - 66, January 2013.
The CRNS Framework and its Application to Programmable and Reconfigurable CryptographySamuel Antão and Leonel SousaACM Transactions on Architecture and Code Optimization, vol. 9, n. 4, pp. 33:1--33:25, January 2013.
2012
2-axis Magnetometers Based on Full Wheatstone Bridges Incorporating Magnetic Tunnel Junctions Connected in SeriesRicardo Ferreira, Eduardo Paz, Paulo Freitas, João Ribeiro, José Germano and Leonel SousaIEEE Transactions on Magnetics, vol. 48, n. 11, pp. 4107-4110, November 2012.
Integration of Magnetoresistive Biochips on a CMOS circuitF. Cardoso, Tiago Costa, José Germano, S. Cardoso, J. Borme, J. Gaspar, Jorge Fernandes, Moises Piedade and P. FreitasIEEE Transactions on Magnetics, vol. 48, n. 11, pp. 3784-3787, November 2012.
A differential planar eddy currents probe: Fundamentals, modeling and experimental evaluationLuís Rosado, Telmo Santos, Pedro Ramos, Pedro Vilaça and Moises PiedadeNDT & E International, Elsevier, vol. 51, pp. 85-93, October 2012.
Integrated Hardware Architecture for Efficient Computation of the n-Best Bio-Sequence Local Alignments in Embedded PlatformsNuno Sebastião, Nuno Roma and Paulo FloresIEEE Transactions on Very Large Scale Integration Systems, IEEE, vol. 20, n. 7, pp. 1262-1275, July 2012.
Portable LDPC Decoding on Multicores using OpenCLGabriel Falcão, Vitor Silva, Leonel Sousa and João AndradeIEEE Signal Processing Magazine, vol. 29, n. 4, pp. 81 - 109, July 2012.
Fine-grain Parallelism using Multi-core, Cell/BE, and GPU SystemsFrederico Pratas, Pedro trancoso, Leonel Sousa, Alexandros Stamatakis, Guochun Shi and Volodymyr KindratenkoJournal of Parallel Computing (ParCo), Elsevier, vol. 38, pp. 365–390, June 2012.
Computation of induced dipoles in molecular mechanics simulations using Graphics ProcessorsFrederico Pratas, Leonel Sousa, Johannes Dieterich and Ricardo MataJournal of Chemical Information and Modeling, ACS Publications, vol. 52, n. 5, pp. 1159–1166, April 2012.
MRC-based RNS Reverse Converters for the Four-Moduli Sets {2^n+1, 2^n-1, 2^n, 2^(2n+1)-1} and {2^n+1, 2^n-1, 2^(2n), 2^(2n+1)-1}Leonel Sousa and Samuel AntãoIEEE Transactions on Circuits and Systema II (TCAS II), vol. 59, n. 4, pp. 244-248, April 2012.
Configurable M-factor VLSI DVB-S2 LDPC Decoder Architecture with Optimized Memory Tiling DesignGabriel Falcão, Marco Gomes, Vitor Silva, Leonel Sousa and João CacheiraEURASIP Journal on Wireless Communications and Networking, Springer, n. 98, March 2012.
Hardware Accelerator Architecture for Simultaneous Short-Read DNA Sequences Alignment with Enhanced Traceback PhaseNuno Sebastião, Nuno Roma and Paulo FloresMicroprocessors and Microsystems, Elsevier, vol. 36, n. 2, pp. 96-109, March 2012.
2011
An Energy Harvesting Circuit for Self-Powered SensorsJorge Fernandes, Miguel Martins, Moises Piedade and Hugo GonçalvesInternational Journal of Microelectronics and Computer Science, vol. 2, n. 1, pp. 1-5, December 2011.
RNS based Elliptic Curve Point Multiplication for Massive Parallel ArchitecturesSamuel Antão, Jean-Claude Bajard and Leonel SousaComputer Journal, Oxford University Press, December 2011.
A tutorial overview on the properties of the discrete cosine transform for encoded image and video processingNuno Roma and Leonel SousaSignal Processing, Elsevier, vol. 91, n. 11, pp. 2443-2464, November 2011.
A Flexible Architecture for the Computation of Direct and Inverse Transforms in H.264/AVC Video CodecsTiago Dias, Sebastian López, Nuno Roma and Leonel SousaIEEE Transactions on Consumer Electronics, IEEE, vol. 57, n. 2, pp. 936-944, May 2011.
GPU-based DVB-S2 LDPC decoder with high throughput and fast error floor detectionGabriel Falcão, João Andrade, Vitor Silva and Leonel SousaIET Electronics Letters, vol. 47, n. 9, April 2011.
Hybrid Antenna-Magnetoresistive Sensor for RF Field DetectionR. Macedo, S. Cardoso, P. Freitas, José Germano and Moises PiedadeJournal of Applied Physics, American Institute of Physics, vol. 109, pp. 07E505 - 07E, March 2011.
Modeling and Evaluating Non-Shared Memory CELL/BE type Multi-Core Architectures for Local Image and Video ProcessingSvetislav Momcilovic and Leonel SousaThe Journal of Signal Processing Systems, Springer, vol. 62, n. 3, pp. 301-318, March 2011.
Self powered, Hybrid Antenna-Magnetoresistive SensorR. Macedo, F. Cardoso, S. Cardoso, P. Freitas, José Germano and Moises PiedadeApplied Physics Letters, American Institute of Physics, vol. 98, pp. 103503 - 103, March 2011.
Massively LDPC Decoding on Multicore ArchitecturesGabriel Falcão, Leonel Sousa and Vitor SilvaTransactions on Parallel and Distributed Systems (TPDS), IEEE, vol. 22, n. 2, pp. 309-322, February 2011.
CHPS: An Environment for Collaborative Execution on Heterogeneous Desktop SystemsAleksandar Ilic and Leonel SousaInternational Journal of Networking and Computing (IJNC), vol. 1, n. 1, pp. 96–113, January 2011.
Improved Nanopipelined RTD Adder Using Generalized Threshold GatesHector Pettenghi, Maria Avedillo and Jose QuintanaIEEE Transactions on Nanotechnology, vol. 10, n. 1, pp. 155-162, January 2011.
On the generation of correlated Gaussian random variates by Inverse DFTGonçalo Tavares and Antonino PetrolinoIEEE Transactions on Communications, IEEE, vol. 59, n. 1, pp. 45-51, January 2011.
2010
A quantitative analysis of firing rate estimators: unveiling bias sourcesPedro Tomás and Leonel SousaNeurocomputing, Elsevier, n. 73, pp. 2944-2954, October 2010.
Advanced Technique for Non Destructive Testing of Friction Stir Welding of MetalsLuís Rosado, Telmo Santos, Moises Piedade, Pedro Ramos and Pedro VilaçaMeasurement, Elsevier, vol. 43, n. 8, pp. 1021-1030, October 2010.
Challenges and trends in the development of a magnetoresistive biochip portable platformVerónica Martins, José Germano, Filipe Cardoso, Joana Loureiro, Susana Cardoso, Leonel Sousa, Moises Piedade, Luís Fonseca and P. FreitasJ. Magnetism and Magnetic Materials, vol. 322, n. 9, pp. 1655–1663, May 2010.
Efficient computation of Hoyt cumulative distribution functionGonçalo TavaresElectronics Letters, vol. 46, n. 7, pp. 537–539, April 2010.
On the True Cramér-Rao Lower Bound for Data-Aided Carrier-Phase-Independent Frequency Offset and Symbol Timing EstimationGonçalo Tavares, Luis Tavares and Antonino PetrolinoIEEE Transactions on Communications, vol. 58, n. 2, pp. 442 - 447, February 2010.
Application Acceleration with the Cell Broadband EngineGuochun Shi, Volodymyr Kindratenko, Frederico Pratas, Pedro Trancoso and Michael GschwindComputing in Science and Engineering, IEEE, vol. 12, n. 1, pp. 76-81, January 2010.
Measuring and Extraction of Biological Information on new Handheld Biochip-based MicrosystemPaulo Lopes, José Germano, Teresa Almeida, Leonel Sousa, Moises Piedade, F. Cardoso, H. Ferreira and P. FreitasIEEE Transactions on Instrumentation and Measurement, IEEE, vol. 59, n. 1, pp. 56-62, January 2010.
On the Modeling of New Tunnel Junction Magnetoresisitive BiosensorsTeresa Almeida, Moises Piedade, Leonel Sousa, José Germano, Paulo Lopes, Filipe Cardoso and Paulo FreitasIEEE Transactions on Instrumentation and Measurement, vol. 59, n. 1, pp. 92-100, January 2010.
2009
A Feature Selection Algorithm for the Regularization of Neuron ModelsPedro Tomás and Leonel SousaIEEE Transactions on Instrumentation and Measurement, IEEE, vol. 58, n. 11, pp. 3824-3830, November 2009.
Parallel LDPC Decoding on GPUs using a Stream-based Computing ApproachGabriel Falcão, Shinichi Yamagiwa, Vitor Silva and Leonel SousaJournal of Computer Science and Technology, Springer, vol. 24, n. 5, September 2009.
Modeling and Programming Stream-based Distributed Computing based on the Meta-Pipeline ApproachShinichi Yamagiwa and Leonel SousaInternational Journal of Parallel, Emergent and Distributed Systems, Taylor & Francis, vol. 24, n. 4, pp. 311-330, August 2009.
Towards a magnetoresistive chip cytometer: integrated detection of magnetic beads flowing at cm/s velocities in microfluidic channelsJ. Loureiro, R. Ferreira, S. Cardoso, P. Freitas, José Germano, C. Fermon, G. Arrias, M.Pannetier-Lecoeur, F. Rivadulla and J. RivasApplied Physics Letters, AIP, vol. 95, pp. 034104, July 2009.
Neural Code Metrics: Analysis and Application to the Assessment of Neural ModelsJoão Martins, Pedro Tomás and Leonel SousaNeurocomputing, Elsevier, vol. 72, pp. 2337-2350, June 2009.
A Portable and Autonomous Magnetic Detection Platform for BiosensingJosé Germano, Verónica Martins, Filipe Cardoso, Teresa Almeida, Leonel Sousa, Paulo Freitas and Moises PiedadeSensors, Molecular Diversity Preservation International, pp. 1-19, May 2009.
Modeling stock markets volatility using GARCH models with Normal, Student t and stable Paretian distributionsJosé Curto, José Pinto and Gonçalo TavaresStatistical Papers, Springer, vol. 50, n. 2, pp. 311-321, March 2009.
Femtomolar Limit of Detection with a Magnetoresistive BiochipVerónica Martins, Filipa Cardoso, José Germano, Susana Cardoso, Leonel Sousa, Moises Piedade, Paulo Freitas and Luís FonsecaBiosensors and Bioelectronics, Elsevier, January 2009.
2008
High coded data rate and multicodeword WiMAX LDPC decoding on the Cell/BEGabriel Falcão, Vitor Silva, Leonel Sousa and José MarinhoElectronics Letters, IET, vol. 44, n. 24, November 2008.
Cost-Efficient SHA Hardware AcceleratorsRicardo Chaves, Georgi Kuzmanov, Leonel Sousa and Stamatis VassiliadisIEEE Transactions on Very Large Scale Integration Systems (TVLSI), IEEE, vol. 16, n. 8, pp. 999-1008, August 2008.
Parallel Advanced Video Coding: Motion Estimation on Multi-coresSvetislav Momcilovic and Leonel SousaJournal of Scalable Computing: Practice and Experience, vol. 9, n. 3, August 2008.
An Improved Feedforward Single Frequency EstimatorGonçalo Tavares, Antonino Petrolino and Luis TavaresIEEE Transactions on Signal Processing, IEEE, vol. 56, n. 5, pp. 2155-2160, May 2008.
Active noise control algorithms with reduced channel count and their stability analysisPaulo LopesSignal Processing, elsevier, vol. 88, n. 4, pp. 811-821, April 2008.
Statistical Analysis of a Spike Train Distance in Poisson ModelsPedro Tomás and Leonel SousaIEEE Signal Processing Letters, IEEE, vol. 15, n. 2009, pp. 357-360, April 2008.
Detection of 130 nm magnetic particles by a portable electronic platform using spin valve and magnetic tunnel junction sensorsFilipe Cardoso, José Germano, Ricardo Ferreira, Susana Cardoso, Verónica Martins, Paulo Freitas, Moises Piedade and Leonel SousaJournal of Applied Physics, American Institute of Physics, vol. 103, pp. 07A310-1-3, March 2008.
2007
Reconfigurable architectures and processors for real-time video motion estimationTiago Dias, Nuno Roma, Leonel Sousa and Miguel RibeiroJournal of Real-Time Image Processing - Special issue on Field-Programmable Technology, Springer Berlin, vol. 2, n. 4, pp. 191-205, December 2007.
Development and Evaluation of Message Passing Library for Maestro2 Cluster NetworkKeiichi aoki, Shinichi Yamagiwa, Koichi Wada and Masaaki OnoElectronics and Computers in Japan, Part II, John Wiley & Sons,Inc., vol. 90, n. 11, pp. 109-121, November 2007.
New Quasi-Orthogonal BCH-Derived Sequences for CDMA ApplicationsCesaltina Ricardo, Manuel Ortigueira and José GeraldETT - European Transactions on Telecommunications, Wiley InterScience, vol. 18, n. 7, pp. 803-810, November 2007.
On the Statistics of the Sum of Squared Complex Gaussian Random VariablesGonçalo Tavares and Luis TavaresIEEE Transactions on Communication, IEEE, vol. 55, n. 10, pp. 1857-1862, October 2007.
Efficient hybrid DCT-domain algorithm for any arbitrary integer re-size video downscalingNuno Roma and Leonel SousaEURASIP Journal on Advances in Signal Processing - Special issue on Video Adaptation for Heterogeneous Environments, Hindawi, n. 57291, pp. 1-16, September 2007.
Improving RNS multiplication with more balanced moduli sets and enhanced modular arithmetic structuresRicardo Chaves and Leonel SousaJournal Computers & Digital Techniques, Institution of Engineering and Technology (IET), vol. 1, n. 5, pp. 472-480, September 2007.
Modeling stock markets’ volatility using GARCH models with Normal, Student’s t and stable Paretian distributionsJosé Curto, José Pinto and Gonçalo TavaresStatistical Papers, Springer, July 2007.
Adaptive Motion Estimation Processor for Autonomous Video DevicesTiago Dias, Svetislav Momcilovic, Nuno Roma and Leonel SousaEURASIP Journal on Embedded Systems - Special Issue on Embedded Systems for Portable and Mobile Video Platforms, Hindawi, n. 57234, pp. 1-10, May 2007.
Caravela: A Novel Environment for stream-based distributed computingShinichi Yamagiwa and Leonel SousaIEEE Computer Magazine, IEEE, vol. 40, pp. 76-83, May 2007.
Noise Characteristics and Particle Detection Limits in Diode+MTJ Matrix Elements for Biochip ApplicationsF. Cardoso, R. Ferreira, S. Cardoso, J. Conde, V. Chu, P. Freitas, José Germano, Teresa Almeida, Leonel Sousa and Moises PiedadeIEEE TRANSACTIONS ON MAGNETICS, vol. 43, n. 6, pp. 2403-2405, May 2007.
Sequence Design for Data-Aided Estimation of Synchronization ParametersGonçalo Tavares and Luis TavaresIEEE Transactions on Communication, vol. 55, n. 4, pp. 670-677, April 2007.
Modelling Heavy Tails and Asymmetry Using ARCH-type Models With Stable Paretian DistributionsAntónio Tavares, José Curto and Gonçalo TavaresNonlinear Dynamics, Springer, vol. 51, n. 1, pp. 231-243, January 2007.
Pseudo-Fractional ARMA modelling using a double Levinson recursionManuel Ortigueira and António SerralheiroIEE Proceedings on Control Theory and Applications, IEE, vol. 1, n. 1, pp. 173 - 178, January 2007.
2006
A New Hand-held Microsystem Architecture for Biological AnalysisMoises Piedade, Leonel Sousa, Teresa Almeida, José Germano, Bertinho Costa, J. Lemos, Paulo Freitas, H. Ferreira and F. CardosoIEEE Transactions on CIrcuits and Systems I: Regular Papers, IEEE, vol. 53, n. 11, pp. 2384-2395, November 2006.
Maestro2: Experimental evaluation of communication performance improvement techniques in the link layerShinichi Yamagiwa, Leonel Sousa, Kevin Ferreira, Keiichi Aoki, Masaaki Ono and Koichi WadaJournal of Interconnection Networks, World Scientific Publishing Company, vol. 7, n. 2, pp. 295-318, June 2006.
Development and Evaluation of Message Passing Library for Maestro2 Cluster NetworkKeiichi Aoki, Shinichi Yamagiwa, Koichi Wada and Masaaki OnoIEICE TRANSACTIONS on Information and Systems, The Institute of Electronics, Information and Communication, vol. 89, n. 5, pp. 919-931, May 2006.
Diode/magnetic tunnel junction cell for fully scalable matrix-based biochipF. Cardoso, H. Ferreira, J. Conde, P. Freitas, D. Vidal, José Germano, Leonel Sousa, Moises Piedade, Bertinho Costa and J. LemosJournal of Applied Physics, vol. 99, pp. 08B307, April 2006.
Towards a Realistic Task Scheduling ModelOliver Sinnen, Leonel Sousa and Frode SandnesIEEE Transactions on Parallel and Distributed Systems, vol. 17, n. 3, pp. 263-275, March 2006.
A New Least-Squares Approach to Differintegration ModellingManuel Ortigueira and António SerralheiroSpecial Issue on Special Issue on Fractional Calculus Applications in Signals and Systems, Journal of Signal Processing,, Elsevier, n. 10, January 2006.
The True Cramér-Rao Lower Bound for Data-Aided Carrier-Phase-Independent Time Delay Estimation From Linearly Modulated WaveformsGonçalo Tavares and Luis TavaresIEEE Transactions on Communication, IEEE, vol. 54, n. 1, pp. 128-140, January 2006.
2005
Visual Neuroprosthesis: A Non-Invasive System for Stimulating the CortexMoises Piedade, José Gerald, Leonel Sousa, Gonçalo Tavares and Pedro TomásIEEE Transactions on Circuits and Systems I - Regular papers, IEEE, vol. 6, n. 12, pp. 2648-2662, December 2005.
New PN Even Balanced Sequences for Spread Spectrum SystemsJosé Inácio, José Gerald and Manuel OrtigueiraEURASIP Journal on Wireless Communications and Networking, EURASIP, vol. 2005, n. 3, pp. 447-458, August 2005.
A Universal Architecture for Designing Efficient Modulo 2^n+1 MultipliersLeonel Sousa and Ricardo ChavesIEEE Transactions on Circuits and Systems-I: Regular Papers, IEEE, vol. 52, n. 6, pp. 1166- 1178, June 2005.
Communication Contention in Task SchedulingOliver Sinnen and Leonel SousaIEEE Transactions on Parallel and Distributed Systems, IEEE, vol. 16, n. 6, pp. 503-515, June 2005.
2004
On the Miller-Chang Lower Bound for Carrier Phase EstimationGonçalo Tavares, Luis Tavares and Moises PiedadeIEEE Transactions on Communications, vol. 52, n. 11, pp. 1867-1871, October 2004.
Behavior of the Modified FX-LMS Algorithm with Secondary Path Modeling ErrorsPaulo Lopes and Moises PiedadeSignal Processing Letters, IEEE, vol. 11, n. 2, pp. 148, February 2004.
On Task Schedulin Accuracy: Evaluation Methodology and ResultsLeonel Sousa and Oliver SinnenThe Journal of Supercomputing, Kluwer Academic Publishers, n. 27, pp. 177-194, February 2004.
Extension for Contention Awareness and Evaluation of Node Priorities for Heterogeneous Cluster ArchitecturesOliver Sinnen and Leonel SousaParallel Computing, Elsevier, vol. 30, n. 1, pp. 81-101, January 2004.
2003
A new symmetric fractional B-spline", Signal ProcessingManuel OrtigueiraSignal Processing, Elsevier, vol. 83, pp. 2311-2318, November 2003.
Fractional signal Processing and applicationsManuel Ortigueira and J. MachadoSignal Processing, Elsevier, vol. 83, pp. 2285-2286, November 2003.
On the initial conditions in continuous-time fractional linear systemsManuel OrtigueiraSignal Processing, Elsevier, vol. 83, pp. 2301-2309, November 2003.
Experimental Evaluation of Task Scheduling Accuracy: Implications for the Scheduling ModelOliver Sinnen and Leonel SousaTransactions on Information and Systems, IEICE, vol. 86, n. 9, pp. 96-103, September 2003.
Fast Transcoding Architectures for Insertion of Non-Regular Shaped Objects in the compressed DCT DomainNuno Roma and Leonel SousaSignal Processing: Image Communication, Elsevier, vol. 18, n. 8, pp. 659-683, September 2003.
Automatic Synthesis of Motion Estimation Processors Based on a New Class of Hardware ArchitecturesNuno Roma and Leonel SousaJournal of VLSI Signal Processing-Systems for Signal, Image, and Video Technology, Kluwer, vol. 34, n. 3, pp. 277--290, July 2003.
SenToy: an Affective Sympathetic InterfaceAna Paiva, Marco Costa, Ricardo Chaves, Moises Piedade, Dário Mourão, Daniel Sobral, Kristina Hook, Gerd Andersson and Adrian BullockInternational Journal of Human-Computer Studies, Elsevier Science Ltd., vol. 59, n. 1, pp. 227-235, July 2003.
Algorithm for modulo (2^n+1) multiplicationLeonel SousaElectronics Letters, IEE, vol. 39, n. 9, pp. 752-754, May 2003.
2002
Efficient and Configurable Full Search Block Matching ProcessorsNuno Roma and Leonel SousaIEEE Transactions on Circuits and Systems for Video Technology, IEEE, vol. 12, n. 12, pp. 1160-1167, December 2002.
Fractional Discrete-Time Signal Processing: Scale Conversion and Linear PredictionManuel Ortigueira, Carlos Matos and Moises PiedadeNonlinear Dynamics, Kluwer Academic Publishers, vol. 29, n. 1, pp. 173-190, June 2002.
Fractional Discrete-Time Signal Processing: Scale Conversion and Linear PredictionManuel Ortigueira and C. MatosNonlinear Dynamics, Kluwer Academic Publishers, vol. 29, n. 1, pp. 173-190, June 2002.
2001
Improved Cramér-Rao Lower Bounds for Phase and Frequency Estimation With M-PSK SignalsGonçalo Tavares, Luis Tavares and Moises PiedadeIEEE Transactions on Communications, vol. 49, n. 12, pp. 2083-2087, December 2001.
The comb signal and its Fourier transformManuel OrtigueiraSignal Processing, vol. 81, n. 3, pp. 581-592, March 2001.
2000
Communicación Sobre Lineas de Suministro de EnergíaManuel Ortigueira, José Gerald and José InácioInformacion Tcnológica, ISBN 0716-8756, vol. 11, n. 6, pp. 181-188, December 2000.
Digital potentiometer controls AGC circuitMiguel Tavares, Gonçalo Tavares and Moises PiedadeEDN (Electronics Design News), pp. 128-130, August 2000.
A General Method for Eliminating Redundant Computations in Video CodingLeonel SousaElectronics Letters, pp. 306-307, February 2000.
Introduction to Fraccional Linear Systems. Part 1: Continuous-time SystemsManuel OrtigueiraIEEE Proceedings Vision, Image and Signal Processing, vol. 147, n. 1, February 2000.
Introduction to Fraccional Linear Systems. Part 2: Discrete-time SystemsManuel OrtigueiraImage and Signal Processing, IEEE Proceedings Vision, vol. 147, n. 1, February 2000.
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