A feedback approach to the steady-state performance of fractionally spaced blind adaptive equalizers

被引：85
作者：
Mai, JY [1 ]
Sayed, AH
机构：
[1] Adv Res Dept, St Jude Med Cardiac Rhythm Management Div, Sylmar, CA 91342 USA
[2] Univ Calif Los Angeles, Dept Elect Engn, Los Angeles, CA 90024 USA
来源：
IEEE TRANSACTIONS ON SIGNAL PROCESSING | 2000年 / 48卷 / 01期
基金：
美国国家科学基金会;
关键词：
adaptive filter; blind equalization; constant modulus signal; feedback analysis; mean-square error;
D O I：
10.1109/78.815481
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This paper proposes a new approach to the analysis of the steady-state performance of constant modulus algorithms (CMA), which are among the most popular adaptive schemes for blind equalization. A major feature of the proposed feedback approach is that it bypasses the need for working directly with the weight error covariance matrix. In so doing, approximate expressions for the steady-state mean-square error of several CM algorithms are derived, including CMA2-2, CMA1-2, normalized CMA, and a new normalized CMA variant with less bias. A comparison among the various algorithms is also performed, along with several simulation results. The conclusions confirm the superior performance of CMA2-2.
引用
收藏
页码：80 / 91
页数：12
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