Low-complexity maximum-likelihood detection of coded signals sentover finite-state Markov channels |
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Authors: | Lifang Li Goldsmith AJ |
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Affiliation: | Exeter Group Inc., Los Angeles, CA; |
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Abstract: | We propose a decision-feedback decoder for coded signals transmitted over finite-state Markov channels. The decoder achieves maximum-likelihood sequence detection (in the absence of feedback errors) with very low complexity by exploiting previous bit decisions and the Markov structure of the channel. We also propose a similar decoder, the output-feedback decoder, that does not use previous bit decisions and therefore does not suffer from error propagation. The decoder performance is determined using a new sliding window analysis technique as well as by simulation. Both decoders exhibit excellent bit error rate performance with a relatively low complexity that is independent of the channel decorrelation time |
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