Joint message-passing decoding of LDPC codes and partial-response channels

Ideas of message passing are applied to the problem of removing the effects of intersymbol interference (ISI) from partial-response channels. Both bit-based and state-based parallel message-passing algorithms are proposed. For a fixed number of iterations less than the block length, the bit-error ra...

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Vydáno v:IEEE transactions on information theory Ročník 48; číslo 6; s. 1410 - 1422
Hlavní autoři: Kurkoski, B.M., Siegel, P.H., Wolf, J.K.
Médium: Journal Article
Jazyk:angličtina
Vydáno: New York IEEE 01.06.2002
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Témata:
Algorithms
Blocking
Channels
Decoders
Decoding
Error analysis
Error detection coding
Infinity
Information
Interference suppression
Intersymbol interference
Message passing
Noise
Partial response signaling
Signal detection
Signal to noise ratio
Theory
ISSN:0018-9448, 1557-9654
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Shrnutí:Ideas of message passing are applied to the problem of removing the effects of intersymbol interference (ISI) from partial-response channels. Both bit-based and state-based parallel message-passing algorithms are proposed. For a fixed number of iterations less than the block length, the bit-error rate of the state-based algorithm approaches a nonzero constant as the signal-to-noise ratio (SNR) approaches infinity. This limitation can be removed by using a precoder. It is well known that low-density parity-check (LDPC) codes can be decoded using a message-passing algorithm. Here, a single message-passing detector/decoder matched to the combination of a partial-response channel and an LDPC code is investigated.
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ISSN:0018-9448
1557-9654
DOI:10.1109/TIT.2002.1003830