多模盲均衡算法剩余码间干扰的近似表达式  

Approximated expression for the achievable residual intersymbol interference obtained by multimodulus blind equalizers

作　　者：王成[1] 杨宾[1] 

机构地区：[1]解放军信息工程大学信息系统工程学院,河南郑州450002

出　　处：《西安电子科技大学学报》2014年第1期176-181,共6页Journal of Xidian University

基　　金：国家高技术研究发展计划资助项目(2009AA011504)

摘　　要：给出了多模自适应盲均衡算法所能达到剩余码间干扰的近似表达式,该表达式是关于迭代步长、均衡器阶数、输入信号统计量、信噪比和信道能量的函数.经仿真验证,该近似表达式较准确地反映了剩余码间干扰与均衡时各参数的数值关系.式中的信道能量和信噪比可以通过算法估计或实际测量获得,因此,新表达式在一定程度上可以代替仿真的方法,用来设计均衡器所需的自适应步长和阶数以及比较不同盲均衡算法的性能.A closed approximated formed expression for the achievable residual inter-symbol interference （ISI） is proposed for the adaptive equalizers that adopt the multimodulus algorithm. The expression depends on the step-size parameter, equalizer＇s tap length, input signal statistics, signal noise ratio and channel power. Simulation proves that the expression shows the exact relationship between residual inter- symbol interference and involved parameters. Since the channel power and signal noise ratio of the expression are measurable or can be calculated, this new approximated expression can be a useful tool for choosing the step-size and tap length for designing an equalizer, and for making direct performance comparison between blind equalizers based on distinct algorithms.

关 键 词：自适应盲均衡 多模算法 码间干扰表达式 

分 类 号：TN929.5[电子电信—通信与信息系统]