基于余弦代价函数的T/4分数间隔盲均衡算法  

Cosine cost function based T/4 fractionally spaced blind equalization algorithm

作　　者：韩迎鸽[1] 崔鹏鹏[1] 王超 李保坤[1] 陈苏程 Han Yingge;Cui Pengpeng;Wang Chao;Li Baokun;Chen Sucheng(School of Electrical ＆ Information Engineering,Anhui University of Science ＆ Technology,Huainan Anhui 232001,China)

机构地区：[1]安徽理工大学电气与信息工程学院,安徽淮南232001

出　　处：《计算机应用研究》2018年第7期2022-2024,共3页Application Research of Computers

基　　金：国家自然科学基金资助项目(51605006)

摘　　要：针对常模算法(CMA)对非常模高阶QAM信号均衡后收敛速度慢、稳态均方误差大的缺点,以T/4分数间隔均衡器为例,提出一种基于余弦代价函数的T/4分数间隔盲均衡算法(T/4-FSE-CCF),该算法将常模的代价函数用构造的余弦代价函数来替代,新算法摆脱了常数模算法对统计模值R的依赖。最后对算法性能进行了理论分析和仿真实验,结果表明,该算法对高阶QAM信号不仅提高了收敛速度而且降低了稳态均方误差。Aiming at the slow convergence rates and the large steady-state mean square error of constant modulus algorithm（CMA） for high-order QAM signal,taking the T/4 fractionally spaced equalizer for example,this paper proposed a T/4 fractionally spaced equalization algorithm based on cosine cost function（ T/4-FSE-CCF）. It used cosine cost function to replace the cost function of CMA,the new algorithm got rid of the dependence on statistical modulus value R compared with CMA.This paper analyzed the performance of the algorithm by theoretical analysis and simulation,and the results show that the T/4-FSE-CCF has not only the faster convergence rates but also the smaller steady-state mean square error for high-order QAM signal.

关 键 词：常模算法 分数间隔 高阶QAM信号 余弦代价函数 盲均衡 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]