Performance Evaluation of Iterative LDPC-Coded MIMO OFDM System with Time Interleaving
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概要
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Multiple-input multiple-output (MIMO) OFDM technique is an attractive solution to increase the spectrum efficiency for mobile transmission applications. However, high spatial correlation makes signal detection difficult in real outdoor environments, and thus various methods have been developed to improve the detection performance. An iterative low-density parity-check (LDPC) coded multiple-input multiple-output (MIMO) system is a promising method for solving this problem, and its performance has been analyzed theoretically. This paper proposes an iterative LDPC minimum mean square error with soft interference cancellation (LDPC-MMSE-SIC) receiver with a time de-interleaver in front of the MMSE detector and evaluates its performance by computer simulation using channel state information (CSI) acquired in real outdoor measurements. We show that the iterative detection and decoding system with time interleaving, which is long enough to cover a fading cycle, achieves excellent error rate performance in mobile LOS environments and outperforms an LDPC maximum likelihood detection (LDPC-MLD) receiver with the same error correction and interleaving.
- 2010-12-01
著者
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Kambara Kohei
Japan Broadcasting Corporation (nhk) Shizuoka Broadcasting Station
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Ohtsuki Tomoaki
Department Of Computer And Information Keio University
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Nakagawa Takayuki
Japan Broadcasting Corporation (nhk) Science And Technology Research Laboratories
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Ikeda Tetsuomi
Japan Broadcasting Corporation (nhk) Science And Technology Research Laboratories
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MITSUYAMA Kazuhiko
Japan Broadcasting Corporation (NHK), Science and Technology Research Laboratories
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Mitsuyama Kazuhiko
Japan Broadcasting Corporation (nhk) Science And Technology Research Laboratories
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