Iteratively Decoded Variable Length Space-Time Coded Modulation: Code Construction and Convergence Analysis

An iteratively decoded variable length space time coded modulation (VL-STCM-ID) scheme capable of simultaneously providing both coding and iteration gain as well as multiplexing and diversity gain is proposed. Non-binary unity-rate precoders are employed for assisting the iterative decoding of the V...

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Vydané v:	IEEE transactions on wireless communications Ročník 6; číslo 5; s. 1953 - 1963
Hlavní autori:	Ng, S.X., Wang, J., Tao, M., Yang, L.-L., Hanzo, L.
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	Piscataway, NJ IEEE 01.05.2007 Institute of Electrical and Electronics Engineers The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Predmet:	Applied sciences Channel coding Coding Coding, codes Convergence Diversity methods Diversity reception Exact sciences and technology Gain Information, signal and communications theory Iterative decoding Modular construction Modulation Modulation coding Modulation, demodulation Modulators Multiplexing Noise levels Performance gain Signal and communications theory Source coding Space time codes Symbols Telecommunications and information theory Performance evaluation MIMO system Space-time codes Modulator Source coding Space diversity Iterative method Spatial multiplexing VLC Channel coding Iterative decoding EXIT charts Modulation STTC MIMO Symbol error rate Modulation coding Variable length code
ISSN:	1536-1276, 1558-2248
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Popis
Shrnutí:	An iteratively decoded variable length space time coded modulation (VL-STCM-ID) scheme capable of simultaneously providing both coding and iteration gain as well as multiplexing and diversity gain is proposed. Non-binary unity-rate precoders are employed for assisting the iterative decoding of the VL-STCM-ID scheme. The discrete-valued source symbols are first encoded into variable-length codewords that are mapped to the spatial and temporal domains. Then the variable-length codewords are interleaved and fed to the precoder assisted modulator. More explicitly, the proposed VL-STCM-ID arrangement is a jointly designed iteratively decoded scheme combining source coding, channel coding, modulation as well as spatial diversity/multiplexing. As expected, the higher the source correlation, the higher the achievable performance gain of the scheme becomes. Furthermore, the performance of the VL-STCM-ID scheme is about 14.6 dB better than that of the fixed length STCM (FL-STCM) benchmarker at a source symbol error ratio of 10 -4
Bibliografia:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 14 content type line 23
ISSN:	1536-1276 1558-2248
DOI:	10.1109/TWC.2007.360396