相位噪声下OFDM系统中的信道估计与均衡

分析了相位噪声对正交频分复用（OFDM）系统的影响，发现相位噪声不仅产生通用相角错误（CPE），而且还会产生载波间干扰（ICI），这都使OFDM系统的性能急剧恶化，因此必须对CPE和ICI进行校正，文中给出了基于MSE准则的CPE校正方法，考虑到ICI干扰主要来源于相邻信道，进而提出了基于LMS法则的自适应相邻信道干扰消除方法，整个算法简单高效。仿真结果表明，所提出的算法大大改善了OFDM系统的性能。

Channel Estimation and Equalization in OFDM System with Phase Noise

By analyzing the effect of phase noise on the OFDM system, it is found that phase noise results in not only common phase error (CPE) but also intercarrier interference (ICI) that degrade the performance of the OFDM system. The effect of phase noise on the orthogonal frequency division mutliplexing (OFDM) system is analyzed. Phase noise results in not only CPE but also ICI that degrade the performance of the OFDM system. Hence the corrections of CPE and ICI must be carried out. In this paper, a CPE correction method based on the MSE criterion is first given. As ICI mainly results from the adjacent channels, a method of adaptively eliminating the adjacent channel interference is then put forward based on the LMS law.The proposed algorithm is simple and efficient, whose effect on the performance improvement of the OFDM system is finally verified by simulated results simulation results.