一种降低OFDM系统峰均功率比的PTS改进方法

摘要

本文对部分传输序列降低OFDM系统高的峰均功率比的方法进行了改进,该方法是在PTS系统中将原始信号分割成若干个子块之后,在每个子块进行快速傅里叶逆变换之前对每个子块都乘以一个预编码矩阵,该预编码矩阵由离散哈特莱变换矩阵构成.理论分析和仿真结果表明改进PTS方法比现有PTS方法有明显效果,达到了进一步降低峰均功率比的目的.%An improved partial transmit sequences (PTS) method to reduce the high PAPR of OFDM systems is proposed in this paper. First, the original signal is separated into several subblocks. Second, each subblock is multiplied by a precoding matrix composed of the Discrete Hartley Transform matrix. At last, the Inverse Fast Fourier Transform is applied to every subblock in PTS system. Theoretical analysis and simulation results show that the improverd PTS method has more effect on further reducing PAPR of OFDM systems than the tranditional PTS method.