Low-Complexity Iterative Receiver for Coded MIMO-OFDM Systems Based on PIC-MRC(Wireless Communication Technologies)
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概要
- 論文の詳細を見る
A novel low-complexity iterative receiver for coded multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems is proposed in this letter. The iterative receiver uses the parallel interference cancellation (PIC)-maximum ratio combining (MRC) detector for MIMO-OFDM detection, which is a popular alternative to the minimum mean square error (MMSE) detector due to its lower computational complexity. However, we have found that the conventional PIC-MRC detector tends to underestimate the magnitude of its output log likelihood ratios (LLRs). Based on this discovery, we propose to multiply these LLRs by a constant factor, which is optimized according to the extrinsic information transfer (EXIT) chart of the soft-in soft-out (SISO) detector. Simulation results show that the proposed scheme significantly improves the performance of the PIC-MRC-based receiver with little additional cost in computational complexity, allowing it to closely approach the performance of receiver using the much more complex MMSE detector.
- 一般社団法人電子情報通信学会の論文
- 2007-11-01
著者
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He Chen
Dept. Of Electronic Eng. Shanghai Jiaotong Univ.
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LIN Wenfeng
Dept. of Electronic Eng., Shanghai Jiaotong Univ.
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Lin Wenfeng
Dept. Of Electronic Eng. Shanghai Jiaotong Univ.
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