一种峰均比抑制方法的研究

数字波束形成中，高的峰均比会使功率放大器工作在非线性区域，造成发射信号的失真.针对现阶段的信号预畸变抑制峰均比的方法会造成严重的带内干扰和带外噪声等问题，本文提出了一种基于保角压缩的峰均比抑制的方法.该方法首先构造稀疏阵列流型，压缩波束形成过程中的数据量，然后利用保角解析变换的性质，在信号的解析域进行限幅滤波，在信号通过功率放大器后，重构信号.本方法对信号进行了压缩采样，降低了运算的复杂度；同时，在一定程度上抑制了传统限幅滤波算法所造成的带内干扰和带外噪声，提高了信号的抗干扰能力.实验仿真验证了本方法的可行性.

A Method on Peak-to-Average Power Ratio Reduction

The purpose of the present study is to reduce the high Peak-to-Average Power Ratio(PAPR) in Digital Beam-Forming(DBF).We propose a method based on conformal transformation and compressive sensing (CS).We make a sparse array manifold,following that sampling the DBF signal compressively.Then we clip and filter the sampled signal in the analytic domain which is gotten through the conformal transformation.Reconstructing the previous signal could be accomplished through CS.Compared with the former ways,the test experiment results show that by the presented method,the operation speed is faster;the out-band noise and the in-band jamming are much lower.