降低OFDM系统ICI间干扰的时域加窗算法

Reduce ICI interference between time-domain OFDM system and window algorithm

针对频偏引起的OFDM系统中载波间干扰(ICI)问题,提出了一种改进的基于正交化初等函数的Nyquist窗,用于抑制接收端由于频偏引起的载波间干扰。通过最佳的窗参数的选择,使接收端的信号干扰噪声比(SINR)达到最大化,以提高其自适应接收能力。同时,仿真分析了不同窗形对OFDM系统性能的影响,结果表明:所提算法能够极大程度地降低ICI,较好地改善了OFDM系统的SINR和误比特率(BER)性能。

This paper proposes an improved function second order polynomial Nyquist window for OFDM system. The function in the light for reducing the frequency offset induced by inter-carrier interference (ICI) at the receiver. Also, we give a method to se-lect the best window parameters to maximize the receiver SINR. Simulation results are compared for the SINR and for the BER for the Nyquist windowing,the results of simulation show that the algorithm is effective in OFDM systems for ICI.