DocumentCode :
1186541
Title :
A soft decoding scheme for vector quantization over a CDMA channel
Author :
Nguyen, Ha H.
Author_Institution :
Dept. of Electr. Eng., Univ. of Saskatchewan, Saskatoon, Sask., Canada
Volume :
53
Issue :
10
fYear :
2005
Firstpage :
1603
Lastpage :
1608
Abstract :
The optimal decoding of vector quantization (VQ) over a code-division multiple-access (CDMA) channel is too complicated for systems with a medium-to-large number of users. This paper presents a low-complexity, suboptimal decoder for VQ over a CDMA channel. The proposed decoder is built from a soft-output multiuser detector, a soft bit estimator, and the optimal soft VQ decoding of an individual user. Simulation results obtained over both additive white Gaussian noise and flat Rayleigh fading channels show that with a lower complexity and good performance, the proposed decoding scheme is an attractive alternative to the more complicated optimal decoder.
Keywords :
AWGN channels; Rayleigh channels; channel coding; code division multiple access; decoding; multiuser detection; vector quantisation; CDMA channel; additive white Gaussian noise; code-division multiple-access; flat Rayleigh fading channels; optimal decoding; soft bit estimator; soft decoding scheme; soft-output multiuser detector; vector quantization; Additive white noise; Channel coding; Code division multiplexing; Decoding; Detectors; Fading; Multiaccess communication; Multiuser detection; Robustness; Vector quantization; Code-division multiple access (CDMA); combined source and channel coding; multiuser detection; soft decoding; vector quantization (VQ);
fLanguage :
English
Journal_Title :
Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
0090-6778
Type :
jour
DOI :
10.1109/TCOMM.2005.857151
Filename :
1516274
Link To Document :
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