Research Overview
Forward-error correction (FEC) codes can be used in almost all kinds of communication systems (wireless, wireline, fiber optic network, etc.) to provide significant gains over the overall transmit power budget of the link, and at the same time, lower the bit error rate. In our group, research work on both soft-decision and hard-decision error control codec has been extensively carried out, which includes the recently discovered powerful Convolutional Turbo Codes, Block Turbo Codes, LDPC Codes (a re-discovery), conventional Convolutional Codes and Reed-Solomon Codes.
Ph.D. Thesis
- Leilei Song, June 1999 (contact U of M for a complete copy)
- Low-Power VLSI Architecture for Finite Field Applications
- Zhongfeng Wang, Sept. 2000 (thesis abstract)
- High Performance, Low Complexity VLSI Design of Turbo Decoders
- Zhipei Chi, May 2001
- High Performance, High-Speed VLSI Architectures for Wireless Communication Applications
- Tong Zhang , July 2002
- Efficient VLSI Architectures for Error-Correcting Coding
- more to come ...
Papers Published and In Review
Publications on Convolutional Turbo Codec
- Z. Wang, H. Suzuki and K. K. Parhi, "Finite wordlength analysis and adaptive decoding for turbo/MAP decoders", Journal of VLSI signal processing (invited paper), 2000.
- Z. Wang and K. K. Parhi, "Performance improvement and implementation issues of turbo/SOVa decoders", submitted to IEEE trans. on Signal processing, Nov. 2000.
- Z. Wang, Z. Chi and K. K. Parhi, "Area-Efficient High Speed Decoding Schemes for Turbo/MAP Decoders", submitted to IEEE trans. on VLSI Systems, Nov. 2000.
- Z. Wang and K. K. Parhi, "On-line extraction of soft decoding information and its applications in VLSI turbo codes", submitted to IEEE trans. on CAS-II, Oct. 2000.
- Z. Chi, Z. Wang and K. K. Parhi, "On the protection of short-frame turbo codes", to be submitted.
- Z. Wang, H. Suzuki and K. K. Parhi, "VLSI Implementation Issues of Turbo Decoder Design for Wireless Applications", Proc. of 1999 IEEE Workshop on Signal Processing Systems: Design and Implementation, Taipei, Oct. 1999 (best student paper award, SiPS'99)
- Z. Chi, Z. Wang and K. K. Parhi, "High-Throughput, Low-Energy FEC/ARQ Technique for Short Frame Turbo Codes", Proc. of 2000 IEEE Int. Conf. on Acoustics, Speech and Signal Processing, Istanbul, June 2000
- H. Suzuki, Z. Wang and K.K. Parhi, "A K=3 2 Mbps Low Power Turbo Decoder for 3rd Generation W-CDMA Systems", Proc. of 2000 IEEE Customs Integrated Circuits Conference, Orlando, May 2000
- Z. Wang and K. K. Parhi, "Decoding Metrics and Their Applications in VLSI Turbo Decoders", Proc. of 2000 IEEE Int. Conf. on Acoustics, Speech and Signal Processing, Istanbul, June 2000
- Z. Chi, Z. Wang and K. K. Parhi, "Iterative Decoding of Space-Time Trellis Codes and Related Implementation Issues", Proc. of 2000 IEEE Asilomar conference.
- Z. Wang, Z. Chi and K. K. Parhi, "Area-Efficient High Speed Decoding Schemes for Turbo/MAP Decoders", Proc. IEEE ICASSP'2001
- Z. Chi, Z. Wang and K. K. Parhi, "A Study on the Performance, Power Consumption Tradeoffs of Short Frame Turbo Decoder Design", Proc. IEEE ICASSP'2001
- Z. Chi, L. Song and K. K. Parhi, "A Study on the Performance, Complexity Tradeoffs of Block Turbo Decoder Design", Proc. of 2001 IEEE ISCAS, Sydney, Australia, May 2001
- Y. Chen and K. K. Parhi, "A Very Low Complexity Block Turbo Decoder Composed of Extended Hamming Codes", Proc. of Globecom'2001, San Antonio, TX, Nov. 2001
- T. Zhang, Z. Wang and K. K. Parhi, "On Finite Precision Implementation of Low Density Parity Check Codes Decoder", Proc. of IEEE ISCAS'2001, Sydney, Australia, May 2001
- T. Zhang and K. K. Parhi, "A Class of Efficient-Encoding Generalized Low-Density Parity-Check Codes", Proc. of IEEE ICASSP'2001, Salt Lake City, UT, May 2001
- T. Zhang and K. K. Parhi, "VLSI Implementation-Oriented (3,k)-Regular Low-Density Parity-Check Codes", IEEE Workshop on Signal Processing Systems (SiPS) 2001, Antwerp, Belgium, Sept. 2001
- T. Zhang and K. K. Parhi, "High-Performance, Low-Complexity Decoding of Generalized Low-Density Parity-Check Codes", Proc. of Globecom'2001, San Antonio, TX, Nov. 2001
- T. Zhang and K. K. Parhi, "A 54 Mbps (3,6)-Regular FPGA LDPC Decoder", IEEE Workshop on Signal Processing Systems (SiPS) 2002, San Diego, CA, Oct. 2002
- H. Suzuki, Y.N. Chang and K. K. Parhi, "Low-Power Bit-Serial Viterbi Decoder for Next Generation Wide-Band CDMA Systems", Proc. of 1999 IEEE Int. Conf. on Acoustics, Speech and Signal Processing, Phoenix, March 1999
- H. Suzuki, Y.N. Chang and K. K. Parhi, "256 States Low-Power Bit-Serial Viterbi Decoder for Next Generation Wireless Applications", Proc. of 1999 IEEE Customs Integrated Circuits (CICC) Conference, San Diego, May 1999
- S. Jain, L. Song and K. K. Parhi, "Efficient Semi-Systolic VLSI Architectures for Finite Field Arithmetic", IEEE Trans. on VLSI Systems, 6(1), pp. 101-113, March 1998
- L. Song and K. K. Parhi, "Low-Energy Digit-Serial/Parallel Finite Field Multipliers", Journal of VLSI Signal Processing, 19(2), pp. 149-166, June 1998
- L. Song, K. K. Parhi, I. Kuroda, T. Nishitani, "Hardware/Software Codesign of Finite Field Datapath for Low-Energy Reed-Solomon Codecs", IEEE Trans. on VLSI Systems, to appear
- T. Zhang and K. K. Parhi, "On the High-Speed VLSI Implementation of Errors-and-Erasures Correcting Reed-Solomon Decoders", 12th Great Lakes Symposium on VLSI, New York City, NY, April 2002
Web links
- JPL Turbo Code Homepage / TDA Progress Reports
- ANT Department of Communications Engineering
- ITR's Turbo Coding Home Page, Univ. of South Australia
- Small World Communications, Australia
- Turbo codes research at West Virginia University
- Block Turbo Codes Home Page, ENST de Bretagne, France.
- Wireless Systems Laboratory, Georgia Institute of Technology, USA.
- Politecnico di Torino's Turbo-codes page
- Technische Universität Lehrstuhl für Nachrichtentechnik München, Germany
- Caltech Communications Group
- Wireless Multimedia Lab., Cornell University, USA.
- LNT Digital Communications Group
- Center for Satellite Engineering Research (UK)
- David J. MacKay's Homepage, U.K.
- Turbo Codes at West Virginia University, West Virginia University, USA.
- Jakob Anderson's Homepage, Technical University of Denmark.
- Patrick Robertson's Homepage, DLR, Germany
- Error Correcting Codes (ECC) Home Page,
- Coding Research Group, University of Notre Dame.
- more to come soon ...
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