Phase Noise Mitigation Method for OFDM System Based on Huber ML
OFDM系统相位噪声的Huber ML抑制方法

One of the main drawbacks of OFDM is its high sensitivity to phase noise (PHN). This gives rise to subcarriers phase rotation and InterCarrier Interference (ICI), so the orthogonality of subcarriers is destroyed. In this paper, an iterative PHN mitigation method is proposed. ICI coefficients are estimated in frequency domain by Huber ML estimator, and phase errors are mitigated in time domain samples by samples. The Huber ML estimator is robust to the propagation errors. Simulation results are reported in AWGN and multi-path channel models, which shows that the superior ICI mitigation performance of the proposed algorithm is achieved over the other available PHN mitigation methods.