改进PTS算法降低OFDM峰均功率比的研究

针对正交频分复用（OFDM）系统的高峰均功率比值（PAPR）的问题，对传统的部分传输序列（PTS）算法进行了改进。把传统的只进行相位的扰动改进为相位和幅度同时作用，改善了系统的PAPR性能。同时，对相位序列的取值范围进行了研究，验证了取值范围的变化对PAPR值的影响。仿真结果表明，和传统算法相比，改进算法的PAPR性能有了1dB的下降，误码率性能没有下降，边带辅助信息的复杂度有一定的下降。

Research on Modified PTS Algorithm for PAPR Reduction in OFDM

This paper, in view of the high Peak-to-Average Power Ratio（PAPR） problem in Orthogonal Frequency Division Multiplexing （OFDM）, proposes a modified method based on the traditional Partial Transmit Sequences（PTS）. The action only by rotate phase sequence in traditional method is modified as action jointly by rotate phase sequence and controtamplitude of signal, thus achieving a better PAPR performance. The range of phase sequence is researched and the influence of range on PAPR is verified. MATLAB simulation results show that, with the same Bits Error Rate（BER） condition, the PAPR performance of the modified method has a decrease of ldB, and the complexity of the transmission sequences also has certain decline.