Improving the performance of SM-MIMO/BICM-ID systems with LLR distribution matching

In this paper, a distribution matching technique is proposed to process the extrinsic information produced by practical multiple-antenna detectors with iteratively demodulated, bit-interleaved coded modulation (BICM-ID). It is shown that significant gains may be achieved by appropriately processing...

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Bibliographic Details
Published in:IEEE transactions on communications 2009-11, Vol.57 (11), p.3239-3243
Main Authors: Jia, Qinghua, Kim, Yongsang, Seol, Changkyu, Cheun, Kyungwhoon
Format: Article
Language:English
Subjects:
bitinterleaved coded modulation (BICM)
Channels
Concatenated codes
Decoders
Detectors
Fading
fading channels
Feeding
Gain
Gaussian distribution
Information technology
Interleaved codes
Iterative decoding
iterative detection
Log-likelihood ratio (LLR) matching
Matching
MIMO
Modulation
Modulation coding
Simulation
spatially-multiplexed multiple-input multiple-output (MIMO)
Turbo codes
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Summary:In this paper, a distribution matching technique is proposed to process the extrinsic information produced by practical multiple-antenna detectors with iteratively demodulated, bit-interleaved coded modulation (BICM-ID). It is shown that significant gains may be achieved by appropriately processing the extrinsic information generated by practical multiple-antenna detectors before feeding it to the channel decoder. The validity of the proposed matching technique is shown via simulation results applied to Turbo-coded BICM-ID systems using (QRD)-M and list sphere detectors.
ISSN:0090-6778
1558-0857
DOI:10.1109/TCOMM.2009.11.080029