OFDM系统中ICI自消除算法的研究

OFDM系统对相位噪声极其敏感，会引入共同相位误差CPE（Common Phase Error）和载渡间干扰ICI（Intercarrier Interference），严重降低系统性能。对ICI自消除算法进行了研究，分析比较了数据取反（data—conversion）ICI自消除算法和数据共轭（data—conjugate）ICI自消除算法性能，并基于此提出了一种改进的取反相位噪声自消除算法。仿真结果表明，该算法实施起来非常简单，且可以有效的降低相位噪声的影响。

Study on ICI self - cancellation algorithm of OFDM systems

OFDM systems are very sensitive to the phase noise,which will cause Common Phase Error as well as Intercarrier Interference.This paper does detailed study on the ICI self-cancellation algorithms for OFDM systems.Performance of two widely-recognized self-cancellation algorithms,data-conversion algorithm and data-conjugate algorithm are analyzed and compared,and an enhanced data-conversion phase noise mitigation algorithm is proposed.Simulation result shows that the proposed algorithm has very low complexity and can eliminate the phase noise effect efficiently.