Browsing by Author "Liu, XB"

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Memory-enhanced MMSE decoding in vector quantization
(2003-10-01)
Hsu, HL
;
Chang, WW
;
Liu, XB
;
Koh, SN
;
電信工程研究所
An approach to minimum mean-squared error (MMSE) decoding for vector quantization over channels with memory is presented. The decoder is based on the Gilbert channel model that allows the exploitation of both intra- and inter-block correlation of bit error sequences. We also develop a recursive algorithm for computing the a posteriori probability of a transmitted index sequence, and illustrate its performance in quantization of Gauss-Markov sources under noisy channel conditions.
MMSE decoding for vector quantization over channels with memory
(2002)
Hsu, HI
;
Chang, WW
;
Liu, XB
;
Koh, SN
;
電信工程研究所
This paper presents memory-enhanced extensions of minimum mean-squared error (MMSE) decoding for vector quantization over noisy channels. We also develop a recursive algorithm for computing the transition probabilities of the Gilbert channel, and illustrate its performance in vector quantization of Gauss-Markov sources under noisy channel conditions. Simulation results indicate that the proposed algorithm enables the implementation of an MMSE decoder with increased robustness to channel errors.