Spatially Concatenated Codes with Turbo Equalization for Correlated Sources
説明
This paper proposes for single carrier signaling a simple structure that combines turbo equalization and decoding of correlated sources in multipath-rich multiuser Rayleigh fading multiple access channels (MAC), where the correlation between the sources is exploited by vertical iterations (VI) between the decoders. The bit-flipping model with a flipping probability p_e is used to express the ρ correlation between the sources as ρ = 1 - 2p_e. The proposed simple structure, spatially concatenated codes (SpCC), can achieve turbo-like performance over MAC channels suffering from severe inter-symbol interference (ISI), even though it uses short memory convolutional codes. First of all, to achieve turbo-like performance we introduce VIs to exploit the knowledge about the source correlation by exchanging extrinsic log-likelihood ratio (LLR) between the two decoders. We then add a rate-1 doped accumulator (D-ACC) to flexibly adapt for the variation of correlations between the sources. The results of computer simulations and extrinsic information transfer (EXIT) analysis confirm that in multipath-rich environments the proposed structure can achieve excellent performances, 1.02.1.28 dB away from the Slepian-Wolf-Shannon limit, at 1% outage probability for 0 <= 1.
identifier:https://dspace.jaist.ac.jp/dspace/handle/10119/10572
収録刊行物
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- IEEE Transactions on Signal Processing
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IEEE Transactions on Signal Processing 60 (10), 5572-5577, 2012-06-11
Institute of Electrical and Electronics Engineers (IEEE)
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詳細情報 詳細情報について
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- CRID
- 1050282812515042944
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- NII論文ID
- 120006219621
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- ISSN
- 1053587X
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- Web Site
- http://hdl.handle.net/10119/10572
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- 本文言語コード
- en
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- 資料種別
- journal article
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- データソース種別
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- IRDB
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