电磁频谱衰落信道的相位校正盲均衡算法研究  

On Phase Correction Blind Equalization Algorithm Suitable for Electromagnetic Spectrum Fading Channel

作　　者：任志勇[1] 冯文江[2] 

机构地区：[1]重庆电子工程职业学院通信工程系,重庆401331 [2]重庆大学通信工程学院,重庆400044

出　　处：《重庆师范大学学报（自然科学版）》2014年第6期97-101,共5页Journal of Chongqing Normal University:Natural Science

基　　金：重庆市教育委员会科学技术研究项目(No.KJ132206);国家自然科学基金(No.60872038)

摘　　要：针对电磁频谱衰落信道中常规恒模盲均衡算法对所接收信号相位变化不敏感的缺点,研究了一种即携带接收信号的幅值信息,同时还携带接收信号相位信息的修正恒模盲均衡算法。论文在对修正恒模盲均衡算法进行推导的基础上,利用电磁频谱衰落信道,仿真了高阶正交幅度调制信号的修正恒模盲均衡算法性能。仿真结果表明,修正恒模算法在均衡后星座图不仅汇聚程度大幅提高,而且纠正了由电磁频谱衰落信道带来的相位偏转,在收敛速度和降低残余符号间干扰方面均改善了均衡器的性能。Now that the constant modulus blind equalization algorithm is not sensitive to phase change of received signals in the elec- tromagnetic spectrum fading channel, the modified constant modulus algorithm has been studied, which carries the amplitude infor- mation of received signals, also carrying the received signal phase information at the same time. In this paper, the modified constant modulus algorithm was deduced. Using the electromagnetic spectrum fading channel, performance of MCMA was simulated for higher-order QAM signals. Simulation has shown that MCMA not only greatly improved the degree of convergence of constellation after equilibrium, and corrected phase deflection. The algorithm can improve the convergence rate and reduce the residual intersym- bol interference （ISI）, accordingly improve the performance of the equalizer.

关 键 词：频谱衰落 盲均衡 正交幅度调制 修正恒模算法 符号间干扰 

分 类 号：TN911.5[电子电信—通信与信息系统]