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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Bibliographic Details
Published in:IEEE transactions on wireless communications Vol. 6; no. 5; pp. 1953 - 1963
Main Authors: Ng, S.X., Wang, J., Tao, M., Yang, L.-L., Hanzo, L.
Format: Journal Article
Language:English
Published: Piscataway, NJ IEEE 01.05.2007
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
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
Online Access:Get full text
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Summary: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
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ISSN:1536-1276
1558-2248
DOI:10.1109/TWC.2007.360396