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Selected Research Highlights of Keshab K. Parhi


High Level Architecture Transformations/DSP System Synthesis

  • First Formulation of Algorithm Transformations for DSP Computing (Proc. IEEE, Dec. 1989)
  • First Formulation and introduction of the folding algorithm to synthesize time-multiplexed DSP circuits from data-flow graphs for specified folding sets (IEEE JSSC, Jan. 1992)
  • First Formulation and introduction of the unfolding algorithm to unfold or unroll digital signal processing data-flow graphs (IEEE Trans. Computers, Feb. 1991)
  • First formulation of retiming and folding for multi-rate digital signal processing data-flow graphs (IEEE T-VLSI, Dec. 1998)
  • Retiming for two-dimensional DSP data-flow graphs (IEEE T-VLSI, June 1999)
  • First exhaustive generation of all retiming and scheduling solutions for digital signal processing data-flow graphs (IEEE T-CAS-II, July 1998)
  • Loop scheduling algorithms and the MARS DSP Synthesis Tool (IEEE T-CAD, March 1995)
  • HEAT tool for Power estimation in DSP Systems (IEEE D&T Magazine, April 2000)
  • A maximum cycle mean algorithm for computing iteration period bound of DSP data-flow graphs (Springer JSPS, Dec. 1995)

    Pipelining, Parallel Processing, and Arbitrary Concurrency

  • First pipelining of IIR digital filters using scattered look-ahead transformation (IEEE T-ASSP, Part-I, July 1989)
  • First combined pipelining and parallel processing of IIR digital filters (IEEE T-ASSP, Part-II, July 1989)
  • First approach to pipelining quantizer loop based DSP algorithms using parallel-branch and delayed-decision techniques (IEEE T-CAS, July 1991)
  • First pipelining of lattice IIR Digital filters (IEEE T-SP, April 1994)
  • First formulation of relaxed look-ahead transformation for pipelining the LMS Adaptive filter (IEEE T-CAS-II, Dec. 1993)
  • First pipelining of the QRD-RLS Adaptive filter using annihilation reordering transformation (IEEE T-SP, Aug. 2000)
  • First pipelining and parallel processing of the Tomlinson-Harashima precoder (IEEE T-CAS-I, Sept. 2007)
  • Arbitrary concurrency in Huffman decoders (IEEE ICASSP 1999)
  • Arbitrary concurrency in Arithmetic coders (IEEE T-SP, Oct. 2006)
  • Arbitrary concurrency in CRC checks, BCH encoders, and linear feedback shift registers (IEEE T-SP, Sept. 2011)

    VLSI Communications Systems Architectures

  • An architecture for discrete wavelet transform (IEEE T-VLSI, June 1993)
  • First optimization of FFT architectures for real input signals (IEEE T-CAS-I, Dec. 2009)
  • Generalized FFT Architectures using Folding (IEEE T-VLSI, June 2012)
  • Architectures for arbitrarily parallel turbo decoders (IEEE T-VLSI, Dec. 2002)
  • First architectures for multi-gigabit decision feedback equalizers (IEEE T-VLSI, April 2005)
  • Joint (3,k) low-density parity check code/decoder (IEEE T-SP, April 2004)
  • First parallel Viterbi decoder with logarithmic latency with respect to parallelism (IEEE T-VLSI, June 2004)
  • New Retiming in Add-Compare-Select Loop of Viterbi Decoder (IEEE Trans. Circuits and Systems-I, March 2004)
  • Fast factorization in soft-decision Reed-Solomon decoder (IEEE T-VLSI, April 2005)
  • Pipelined parallel decision feedback decoder (IEEE T-SP, Feb. 2007)
  • Complexity reduction in parallel FIR filter (Springer September 1997)     (IEEE T-CAS-I, Aug. 2004)
  • FEXT cancellation and equallization for 10-gigabit ethernet (IEEE T-CAS-I, June 2009)
  • Low-Latency Polar Code Decoder Architectures (IEEE T-SP, June 2013)     (IEEE T-CAS-I, 2014)

    Binary/Finite Field Arithmetic, Cryptography, and Hardware Security

  • A new low-power binary adder (IEEE T-VLSI, Dec. 1999)
  • Systolic architectures for modular multiplication (Springer JSPS, April 2002)
  • High-speed architectures for the AES algorithm (IEEE T-VLSI, Sept. 2004)
  • High-speed architectures for elliptic curve cryptography (Springer JSPS, July 2010)
  • Performance Analysis of MUX Physical Unclonable Functions (IEEE T-CAD, 2014)
  • Obfuscated DSP Circuits that are harder to reverse engineer (IEEE T-VLSI, to appear)

    Biomedical Signal Classification, and Machine Learning

  • Prediction of Seizures in Epileptic Patients (Epilepsia, Oct. 2011)
  • Diabetic Retinopathy Screening using DREAM tool (IEEE JBHI, 2014)

    Molecular Signal Processing/DNA Computing

  • Discrete-Time Signal Processing using Molecular Reactions/DNA Strands (IEEE Design & Test, May/June 2012) and (ACS Synthtic Biology, 2013)
  • Synchronous Sequential Computation with Molecular Reactions/DNA Strands (IEEE DAC-2011)
  • Digital Logic using Molecular Reactions/DNA Strands (IEEE ICCAD-2013)

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