Iterative Detection and Decoding Algorithms for MIMO Systems in Block-Fading Channels Using LDPC Codes

We propose iterative detection and decoding (IDD) algorithms with low-density parity-check (LDPC) codes for multiple-input multiple-output (MIMO) systems operating in block-fading and fast Rayleigh fading channels. Soft-input-soft-output minimum-mean-square-error (MMSE) receivers with successive int...

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Veröffentlicht in:IEEE transactions on vehicular technology Jg. 65; H. 4; S. 2735 - 2741
Hauptverfasser: Uchoa, Andre G. D., Healy, Cornelius T., de Lamare, Rodrigo C.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York IEEE 01.04.2016
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
Algorithms
Binary system
Bit error rate
block fading channels
Blocking
Channels
Codes
Decoding
Detectors
Error correcting codes
Fading
IDD schemes
Iterative decoding
LDPC codes
Low density parity check codes
MIMO
MIMO (control systems)
MIMO systems
Receivers
Strategy
multiple-input multiple-output (MIMO) systems
low-density parity-check (LDPC) codes
iterative detection and decoding (IDD) schemes
Block-fading channels
ISSN:0018-9545, 1939-9359
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Zusammenfassung:We propose iterative detection and decoding (IDD) algorithms with low-density parity-check (LDPC) codes for multiple-input multiple-output (MIMO) systems operating in block-fading and fast Rayleigh fading channels. Soft-input-soft-output minimum-mean-square-error (MMSE) receivers with successive interference cancellation are considered. In particular, we devise a novel strategy to improve the bit error rate (BER) performance of IDD schemes, which takes into account the soft a posteriori output of the decoder in a block-fading channel when root-check LDPC codes are used. A MIMO IDD receiver with soft information processing that exploits the code structure and the behavior of the log-likelihood ratios is also developed. Moreover, we present a scheduling algorithm for decoding LDPC codes in block-fading channels. Simulations show that the proposed techniques result in significant gains in terms of BER for both block-fading and fast-fading channels.
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ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2015.2432099