多载波信号峰平比优化方法分析

Studying on Optimization Methods for Peak-to-average-power Ratio of Multi-carrier Signal

由多个不同频率的载波组成的多载波信号存在信号峰平比的问题,过大的信号峰平比不仅会降低功放的功率利用率,还可能烧毁功放。异相抵消法、多相序列编码优化法、削波滤波法等优化方法可降低多载波信号峰平比,用这些方法对不同谱线数量和谱线间隔的多载波信号的应用情况进行了仿真分析。

The multi-carrier signal is consisted by many carrier waves with different frequency, it is affected by the peak-to-average-power ratio （PAPR） badly. The large PAPR not only reduces the efficiency of power amplifier, but also can make it be burned. This paper proposed some optimization methods to reduce the PA- PR, such as the out-phase cancellation method, the poly-phase sequence coding optimization method, the clipping and filtering method, and so on. This paper also simulates and analyzes these methods under different types of multi-carrier signal.