Research activity information

• Hardware implementation of soft-decision decoding for Reed-Solomon code
  Makiko Kan; Satoshi Okada; Takafumi Maehara; Kazuhiro Oguchi; Takashi Yokokawa; Toshiyuki Miyauchi
  2008 5th International Symposium on Turbo Codes and Related Topics, 73, 77, IEEE, Sep. 2008, [Last author]
  International conference proceedings
• A High Performance and Programmable Decoder VLSI for Structured LDPC Codes
  Takashi Yokokawa; Osamu Shinya; Yuji Shinohara; Toshiyuki Miyauchi
  2006 International Symposium on Communications and Information Technologies, 370, 375, IEEE, Oct. 2006, [Last author]
  International conference proceedings
• Application of Turbo Codes to High-Density Optical Disc Storage Using 17PP Code
  Toshiyuki Miyauchi; Yuji Shinohara; Yasuhiro Iida; Tetsu Watanabe; Yoshiyuki Urakawa; Hiroyuki Yamagishi; Makoto Noda
  Japanese Journal of Applied Physics, 44, 5S, 3471, 3471, IOP Publishing, 01 May 2005, [Lead author]
  Scientific journal, We have previously proposed a novel trellis decoding technique for soft-output decoding of the 17PP code. Using this technique, we have developed a turbo-coded 17PP system, and showed improvement in the bit error rate (BER) in an additive white Gaussian noise (AWGN) channel by simulation. In this paper, we describe an optimized trellis of the 17PP code that has only 15 states and 53 branches. It is well known that a partial response (PR) channel can be regarded as a convo-lutional code with the trellis structure. Therefore we merged the PR1221 trellis into the 17PP trellis, which we call the “PR17PP” trellis, and similarly optimized this trellis. With the soft-in soft-out (SISO) decoders using this “PR17PP” trellis, it is experimentally confirmed that the turbo-coded 17PP system effectively increases the user capacity of an optical disc.
• Convergence analysis of SCCC and SCTCM with 'in-line' interleaver
  Y. lida; T. Yokokawa; T. Miyauchi; K. Yamamotot; M. Hattori; R.J. McEliece
  IEEE International Symposium on Information Theory, 2003. Proceedings., 410, 410, IEEE, Jun. 2003
  International conference proceedings
• High-performance programmable SISO decoder VLSI implementation for decoding turbo codes
  T. Miyauchi; K. Yamamoto; T. Yokokawa; M. Kan; Y. Mizutani; M. Hattori
  GLOBECOM'01. IEEE Global Telecommunications Conference (Cat. No.01CH37270), 305, 309, IEEE, Feb. 2001, [Lead author]
  International conference proceedings