OFDM最主要缺点之一就是时域的大峰均功率比。为了降低大峰均比,PTS是最常用的方法之一,但传统的PTS方法是对频域数据进行IFFT运算后选择最优传输序列,一般需要多个IFFT,OFDM系统复杂度高。为了解决多IFFT这一问题,本文提出了一种新方法,即在频域里判决最优序列,而大大减少IFFT块的数目。 One of the major drawbacks of OFDM is the large peak-to-average power ratio in the time domain. In order to reduce the large peak-to-average ratio, PTS is one of the most commonly used methods. However, the traditional PTS method selects an optimal transmission sequence after performing IFFT operations on the frequency domain data, and generally requires multiple IFFTs, and the OFDM system has high complexity. In order to solve the problem of multi-IFFT, a new method is proposed in this paper, which is to decide the optimal sequence in the frequency domain and greatly reduce the number of IFFT blocks.