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標題: Turbo MIMO-OFDM Receiver in Time-Varying Channels
作者: Yu-Kuan Chang
Fang-Biau Ueng
Yi-Wei Jhang
關鍵字: MIMO-OFDM;inter-carrier interference;ICI self-cancellation;channel estimation
Project: KSII Transactions on Internet and Information Systems
This paper proposes an advanced turbo receiver with joint inter-carrier interference (ICI) self cancellation and channel equalization for multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems over rapidly time-varying channel environment. The ICI caused by impairment of local oscillators and carrier frequency offset (CFO) is the major problem for MIMO-OFDM communication systems. The existing schemes (conjugate cancellation (CC) and phase rotated conjugate cancellation (PRCC)) that deal with the ICI cancellation and channel equalization can’t provide satisfactory performance over time-varying channels. In term of error rate performance and low computational complexity, ICI self cancellation is the best choice. So, this paper proposes a turbo receiver to deal with the problem of joint ICI self cancellation and channel equalization. We employ the adaptive phase rotations in the receiver to effectively track the CFO variations without feeding back the CFO estimate to the transmitter as required in traditional existing scheme. We also give some simulations to verify the proposed scheme. The proposed schene outperforms the existing schemes.
DOI: 10.3837/tiis.2018.08.009
Appears in Collections:通訊工程研究所

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