LDPC-coded unitary space-time modulation with low-complexity iterative demodulate-decoding scheme

A practical low-density parity-check (LDPC) coded unitary space-time modulation (USTM) noncoherent MIMO communication system over Rayleigh flat fading and additive white Gaussian noise (AWGN) channel was constructed, where the LDPC code is selected from IEEE 802. 16e Standard and USTM is constructed...

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Veröffentlicht in:Tongxin Xuebao Jg. 35; H. 2; S. 146 - 152
Hauptverfasser: Wang, Li-Jiao, Zhang, Lin, Yang, Ling-Ling, Peng, Li, Fu, Da-Wei
Format: Journal Article
Sprache:Chinesisch
Veröffentlicht: Editorial Department of Journal on Communications 01.02.2014
Schlagworte:
Algorithms
Channels
Complexity
Construction standards
Demodulators
Error correcting codes
Fading
iterative feedback
low-density parity-check codes
maximum a posteriori probability demodulation
Modulation
multiple-input multiple-output system
unitary space time modulation
ISSN:1000-436X
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Zusammenfassung:A practical low-density parity-check (LDPC) coded unitary space-time modulation (USTM) noncoherent MIMO communication system over Rayleigh flat fading and additive white Gaussian noise (AWGN) channel was constructed, where the LDPC code is selected from IEEE 802. 16e Standard and USTM is constructed by the unitary matrix based on the sinc-cosinc function, SC-USTM for short. At the receiver, the maximum a posteriori probability (MAP) demodulating algorithm of the SC-USTM was first designed; for reducing the complexity of MAP demodulator, the dual demodulator was then conceived; for improving the performance, the iterative feedback between the belief propagation (BP) decoder and the MPA demodulator was finally introduced. The simulation test shows that the system of the LDPC coded SC-USTM is superior to the uncoded SC-USTM about 15~17 dB at BER 10(-5), and this system has very low complexity.
Bibliographie:ObjectType-Article-2
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ISSN:1000-436X
DOI:10.3969/j.issn.1000-436x.2014.02.019