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Turbo Receiver with ICI-Aware Dual-List Detection for Mobile MIMO-OFDM Systems

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3 Author(s)
Chi-Yun Chen ; Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan ; Yi-Yao Lan ; Tzi-Dar Chiueh

This paper presents a turbo receiver using the proposed ICI-aware Dual-List (IDL) MIMO detection method that can efficiently detect signals deteriorated by both inter-carrier interference (ICI) and inter-antenna interference (IAI). These two interferences often occur simultaneously in mobile multiple-input multiple-output (MIMO)-orthogonal frequency division multiplexing (OFDM) communication systems. The IDL detector enhances ICI mitigation and avoids the notorious error propagation problem encountered in conventional interference mitigation/cancellation schemes. In addition, this study proposes three techniques to reduce the required computational complexity by 99.63% in complex additions, 99.69% in complex multiplications, and 67.25% in comparison operations. Simulation results confirm the theoretical upper bound and also show that the bit error rate performance of the receiver in high-mobility channels is comparable to that of a maximum-likelihood MIMO-OFDM receiver in stationary channels, i.e., the ICI-free scenario.

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Wireless Communications, IEEE Transactions on  (Volume:12 ,  Issue: 1 )