高阶QAM信号的多级盲相位估计方法及其性能仿真

The Multi-stage Blind Phase Estimation Algorithms for High Order QAM Signals and the Simulations of their Performances

本文对高阶QAM信号的盲相位估计算法特别是捕获算法进行了研究,并提出针对高阶QAM信号的多级相位估计算法。它们与已有的相位估计算法相比,以引入一定的时延为代价使相位估计性能有了较大的提高,并且计算机仿真的结果显示不同结构的多级相位估计算法具有不同的性能特点,因此我们应该根据实际应用中的需求来选择算法。

In this paper, the blind phase estimation algorithms and, especially, the acquisition algorithms for high-order QAM signals are studied and some new multi-stage phase estimation algorithms are presented. Compared with the other ones presented before, they have much better performance with the cost of introducing some delays. And the simulation results show that the multi-stage algorithms with various structures have different performances, so the algorithm should be selected according to the requirements of practical application.