NDLI: Log-domain iterative decoding combined USTM with codes over $GF(2^{m})$ on flat Rayleigh fading channel

Content Provider	IEEE Xplore Digital Library
Author	Haiyan Cao Guangqiu Li Zemao Zhao Jun Li
Copyright Year	2008
Description	Author affiliation: China JiLiang Univ., Hangzhou, China (Jun Li) \|\| Telecommun. Eng. Coll., Hangzhou DianZi Univ., Hangzhou, China (Haiyan Cao; Guangqiu Li; Zemao Zhao)
Abstract	In this paper, a serial concatenated scheme combining USTM with LDPC codes over $GF(2^{m})$ is presented. A modulation technique of USTM, Unitary space-time modulation, can efficiently work on decoding when the channel state information is unknown at the receiver in multi-input multi output system over flat raleigh fading channel. The BER performance of USTM system in MIMO channel will largely be improved by serially concatenating a good achieving the shannon limit LDPC(low-density parity-check) codes as outer codes, which have attracted much more attention recently, defined by a sparse parity check matrix over $GF(2^{m})$ in our scheme. The well-known Sum-Product algorithm is also used as the iterative decoding of LDPC codes over $GF(2^{m})$ , but here the algorithm works in the log-domain other than probability-domain for some advantages, such as implementation, computational complexity and etc. Simulating results show that our scheme works very well and about 20dB coding gain is provided by LDPC codes as an outer codes at a BER of $10^{-5}$ than USTM without channel coding. And further simulations assure that USTM concatenating with LDPC codes over $GF(2^{m})$ outperforms more 5-6dB coding gain that LDPC codes over GF(2).
Starting Page	689
Ending Page	692
File Size	151087
Page Count	4
File Format	PDF
ISBN	9781424424238
DOI	10.1109/ICCS.2008.4737274
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-11-19
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Iterative decoding Parity check codes Bit error rate Computational modeling Concatenated codes Channel state information Rayleigh channels MIMO Sparse matrices Sum product algorithm Flat Rayleigh Fading USTM LDPC Log-Domain Iterative Decoding
Content Type	Text
Resource Type	Article

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