Rayleigh Distribution Based Variable Step-Size Constant Modulus Blind Equalization Algorithm
会议名称：《第一届国际测量仪器与测试自动化学术会议》
会议日期：1000年
学科分类：08[工学] 081202[工学-计算机软件与理论] 0812[工学-计算机科学与技术（可授工学、理学学位）]
基 金：The research is Supported by Natural Science Fundation of China (60372086) Anhui Province (050420304) and the Science Foundation of Educational Office. Anhui Province.People’s Republic of China(2003KJ092 2005KJ008ZD) and by Doctor Fund of Anhui University of Science and Technology(2004YB05)
关 键 词：Constant modulus algorithm convergence rates variable step-size rayleigh distribution telephone channel.
摘 要：正Aiming at the slow convergence rates of Constant Modulus Algorithm（CMA） and Residual Error based Variable step-size CMA （REVCMA）, a novel Rayleigh Distribution based on Variable step-size CMA （RDVCMA） is proposed. In this proposed algorithm, the Rayleigh distribution function, which has two parameters and whose independent variable is an error function, is used as variable step-size. The convergence rates of the proposed RDVCMA can be improved by regulating its two parameters. We analyze the influence of the two parameters on the convergence rates and give the regulation principle of the two parameters. Simulation tests with telephone channel using 4QAM and 4PSK are carried out, respectively. The simulation results have indicated that the convergence rates of the proposed RDVCMA are faster than those of the CMA and the REVCMA under condition of the same steady state error. Accordingly, Rayleigh Distribution based Variable step-size CMA （RDVCMA） has better the performance of real time information retrieval and practicability.