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降低峰值平均功率比是实现正交频分复用(OFDM)系统的一个关键性技术,目前主要有限幅类,编码类和概率类。概率类被认为是一种比较理想的技术,本文研究的选择性映射就是其中的一种。选择性映射需要传输边带信息从而使得频带利用率下降,系统复杂度增加。针对这点对改进的相位序列进行了研究分析,从仿真结果可以得到,这种单极随机相位序列可以有效的降低系统的峰值平均功率比,但是却存在计算量大的缺点。
Reducing the peak-to-average power ratio is one of the key technologies for implementing Orthogonal Frequency Division Multiplexing (OFDM) systems. At present, there are mainly limited amplitude classes, coding classes and probability classes. Probability class is considered as a more ideal technology, this study is one of the selective mapping. Selective mapping requires the transmission of sideband information so that the bandwidth utilization is reduced and the system complexity is increased. In view of this point, the improved phase sequence is studied and analyzed. From the simulation results, this unipolar random phase sequence can effectively reduce the peak-to-average power ratio of the system, but there is a large computational burden.