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正交频分复用(OFDM)的一个主要缺点是信号的峰值功率与平均功率比(PAR)很高,部分传输序列(PTS)是一种有效降低OFDM信号PAR的方法。在PTS方法中,采用不同的分割方法可以改善PAR性能。文章提出一种新的子块分割方法——联合分割方法来降低任意子载波数目OFDM系统的PAR。仿真结果表明,联合分割方法既降低了系统的运算复杂度,又降低了系统的PAR。
A major drawback of Orthogonal Frequency Division Multiplexing (OFDM) is the high peak power to average power ratio (PAR) of the signal, which is a way to effectively reduce the PAR of the OFDM signal. In the PTS method, using different segmentation methods can improve PAR performance. In this paper, a new method of sub-block segmentation - joint segmentation is proposed to reduce the PAR of OFDM systems with any number of subcarriers. Simulation results show that the joint segmentation method not only reduces the computational complexity of the system, but also reduces the PAR of the system.