Wiener Filter Preprocessing for OFDM Systems in the Presence of Both Nonstationary and Stationary Phase Noises
Statistics-based Inter-Carrier Interference (ICI) mitigation algorithm is proposed for orthogonal frequency division multiplexing systems in presence of both non-stationary and stationary phase noises. By utilizing the statistics of phase noise, which can be obtained from measurements or data sheets, a Wiener filter preprocessing algorithm for ICI mitigation is proposed. The proposed algorithm can be regarded as a performance-improving technique for the previous researches on phase noise cancelation. Simulation results show that the proposed algorithm can effectively mitigate ICI and lower the error floor, and therefore significantly improve the performances of previous researches on phase noise cancelation, especially in the presence of severe phase noise.