中文摘要：

为了减小正交频分复用（OFDM）系统的高峰值平均功率比（PAPR），采用了限幅滤波方法。该方法是一种简单有效的减小PAPR方法，首先对离散时域的过采样（L≥4）的OFDM信号执行限幅，然后让限幅的信号通过带通滤波器（BPF）和低通滤波器（LPF），最后通过功率谱密度（PsD）观察、PAPR分布和BER性能分析对该方法进行性能评价。仿真结果表明，该方法在减小系统的PAPR的同时，也有效地改善了系统的性能。

英文摘要：

In order to reduce the peak average power ratio （PAPR） of the orthogonal frequency division multiplexing （OFDM） system, the clipping and filtering method is used in this paper. The method is a simple and effective one to reduce PAPR. The amplitude of discrete time-domain oversampling （L≥4）OFDM signal is limited first, and then let the clipped signal go through the band pass filter （BPF） and low pass filter （LPF）. The performance evaluation of the proposed method is carried out by means of power spectral density （PSD） observation, PAPR distribution and BER performance analysis. The simulation results show that the method can reduce PAPR of the system, and improve the performance of the system effectively.