针对正交频分复用系统,提出了一种复杂度较低的降低峰均功率比的方法。该方法首先实施时域过采样,再采用功率归一化和限幅,最后对限幅后的信号进行低通滤波。此外,从信噪比和信号噪声失真比等角度分析了限幅对过采样OFDM信号的影响。仿真结果表明,与传统的限幅滤波方法对比,该方法能有效抑制滤波后系统峰均功率比的回升。 For Orthogonal Frequency Division Multiplexing (OFDM) systems, a method of reducing PAPR is proposed. The method first implements time-domain oversampling, then uses power normalization and clipping, and finally low-pass filters the amplitude-limited signal. In addition, the effect of clipping on oversampled OFDM signals is analyzed from the aspect of signal-to-noise ratio and signal noise distortion. The simulation results show that this method can effectively suppress the peak-to-average power ratio of the filtered system compared with the traditional limiting filter method.