信号復号方法及び装置

Japanese Patent JP4189407

B2

This invention generally relates to methods, apparatus and computer program code for decoding signals, and more particularly to trellis-based decoding using a variant of a BCJR procedure. The invention includes a trellis decoder for decoding symbols of a received signal, the symbol including a sequence defined by transitions between states of a trellis, the trellis decoder including: means for performing a forward recursion through the trellis to determine a first set of probabilities (alpha(Xt)) each defining a probability of a said trellis state (Xt) responsive to one or more current or earlier received signal values (y1:t); means for providing a second set of (beta(Xt)) probabilities each defining a probability of one or more received signal values (yt+1:T) given an earlier the trellis state (Xt); means to decode the received signal to determine probabilities (p(bt|y1:T)) for symbols of a corresponding transmitted sequence of symbols from the first and second sets of probabilities; and where the decoder further includes: means to select states for determining the first set of probabilities responsive to one or more received signal values later than a the trellis state defining a probability in said first set.

Ciellan Marsuri Visanage
Christoph Andrew
Robert Peacock
Mon Suan Yi

JP2006001965A

December 03, 2008

January 10, 2006

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Toshiba Corporation

H03M13/29; H03M13/39; H03M13/45; H03M13/47; H04B7/02; H04B7/06; H04J99/00; H04L1/00; H04L1/06

JP2001267937A
JP2000512116A
JP11088196A

WO2004012340A1

Takehiko Suzue
Satoshi Kono
Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Sadao Muramatsu
Ryo Hashimoto

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