摘要
针对短时突发信号符号数太少,直接均衡无法收敛以及MCMA盲均衡算法无法纠正π/4-DQPSK信号相位旋转的问题,在基于π/4-DQPSK信号的MMMA盲均衡算法的公式的推导上,提出了一种基于"数据重用"的MMMA盲均衡算法。计算机仿真表明,只需较少的π/4-DQPSK符号,在不明显增加计算复杂度的情况下,基于"数据重用"的MMMA算法相对于CMA、MCMA算法不仅纠正了相位旋转的问题,且收敛速度更快、收敛误差更小、星座图更加聚拢,有一定的工程实用价值。
Considering that the direct equalization method cannot converge for short burst signals and MCMA blind equalization al- gorithm cannot correct the phase rotation of π/4-DQPSK signal, a data reusing MMMA blind equalization algorithm is proposed based on the formula derivation of MMMA blind equalization algorithm for π/4-DQPSK signal. Computer simulation results have proved that only a few π/4-DQPSK symbols are needed and the computational complexity is not increased obviously. Compared to CMA and MCMA algorithm,this novel equalization algorithm not only corrects the phase rotation but also has faster convergence speed,smaller convergence error and more concentrated constellation points. Therefore, this method is of certain practical value.
出处
《电视技术》
北大核心
2015年第15期97-100,共4页
Video Engineering
基金
国家自然科学基金项目(61261010)
作者简介
晏碧云(1990-),硕士生。主要研究方向为短波突信号处理
李迟生(1963-),教授,硕士生导师,主要研究方向为通信对抗、移动通信、信息处理
王玉嗥(1977-),教授,硕士生导师,主要研究方向为电波传播及其工程应用。