A modified constant modulus algorithm for adaptive channel equalization for QAM signals

被引：6
|
作者：
Amin, M [1 ]
He, L [1 ]
Reed, C [1 ]
Malkemes, R [1 ]
机构：
[1] Villanova Univ, Dept Elect & Comp Engn, Villanova, PA 19085 USA
来源：
2001 IEEE WORKSHOP ON STATISTICAL SIGNAL PROCESSING PROCEEDINGS | 2001年
关键词：
D O I：
10.1109/SSP.2001.955349
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
A modified constant modulus algorithm (MCMA) for adaptive equalization of wireless indoor channel for QAM signals is presented. The algorithm minimizes an error cost function that includes both amplitude and phase of the equalizer output. In addition to the amplitude-dependent term that is provided by the conventional constant modulus algorithm (CMA), the cost function includes a signal constellation matched error (CME) term. This term speeds up convergence and allows the equalizer to switch to Decision Directed (DD), or any soft-decision mode, faster than the CMA applied alone. The constellation-matched error term is constructed using polynomials with desirable properties. The MCMA is applied to a decision feedback equalizer and shown to provide improved performance over dual mode techniques.
引用
收藏
页码：563 / 566
页数：4
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