基于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．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．同时，改进的算法也抑制了加入边带信息以后的系统的峰值再生问题．在上述理论的基础上，对系统进行仿真，结果表明，改进算法的PAPR性能有了1dB的下降，边带辅助信息的复杂度有一定的下降．

Research on the improved PTS algorithm for PAPR reduction in OFDM

Aiming at the high peak-to-average power ratio （PAPR） problem of the orthogonal frequency division multiplexing（OFDM）, this paper presents an improved method based on the traditional partial transmit sequences （PTS）. The traditional principle only rotates phase sequence to decrease PAPR, while the proposed method not only rotates phase sequence, but also controls the amplitude of signal, increasing the property of PAPR. The range of phase sequence is researched in this paper, which shows the influence of the range on PAPR At the same time, the proposed method can restrain the appearance of the peak power after joining the side information （SI）. On the basis of above theory, MATLAB simulation results show that the proposed method of PAPR performance decreases 1 dB, and reduces the complexity of the transmission sequences to a certain degree