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Improving the Performance of the Error Function for Fast Phase Recovery of QAM Signals in CMA Blind Equalizers using Variable Step

【摘要】A new constant modulus algorithm (CMA) type of error function for fast phase recovery of QAM signals was recently proposed in which the cost function of the error function recovers the phase simultaneously with the equalization. In this paper we propose variable step (VS) in the update equations of new error function to enhance the performance of convergence speed and residual inter-symbol interference (ISI). Effectiveness of the error function for well-behaved channel, under-modeled channel and channel disparity are presented. Simulation results are presented to compare the performance of VS, constant step (CS) and the modified CMA (MCMA) using 16-QAM signal constellation.

【会议名称】 Conference on Advanced Signal Processing Algorithms, Architectures, and Implementations XIV; 20040804-06; Denver,CO (US)

【会议地点】Denver,CO (US)

【作者】Sathyanarayan S.Rao (late);Priyadarshini Muddepal;

【作者单位】ECE Dept, Villanova University, Villanova, PA 19085 Sudarshan Rao Nelatury Penn State University, 5091 Station Road, Erie, PA, 16563-1701;

【会议组织】

【会议召开年】2004

【页码】P.307-312

【总页数】6

【原文格式】PDF

【正文语种】eng

【中图分类】TP391;TN911;

【关键词】blind equalization;constant modulus algorithm;equalizers;

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