摘要
针对常数模(Constant Modulus Algorithm,CMA)收敛速度慢、均方误差大的缺点,在分析基于正交小波变换的盲均衡器结构及奇对称误差函数的特性基础上,提出了一种基于正交小波变换的奇对称误差函数盲均衡算法(WT-OSE,orthogonal Wavelet Transform based Odd Symmetry Error function blind equalization algorithm),该算法通过归一化正交小波变换来加速收敛速度,用误差函数的奇对称性以减小均方误差,利用变步长来进一步加快收敛速度。水声信道的仿真结果表明,该算法具有较快的收敛速度和较小的均方误差。
Aiming at the slow convergence rate and big mean square error of Constant Modulus Algorithm（CMA）,orthogonal wavelet transform based odd symmetry error function blind equalization algorithm blind equalization algorithm was proposed,on the basis of orthogonal wavelet transform based blind equalizer structure and characteristics of odd symmetry error function,the convergence rate of the proposed algorithm could be improved by normalized orthogonal wavelet transform and its mean square error could be reduced by odd symmetry of error function and the convergence rate was further improved via using the performance of variable step size.Simulation tests with underwater acoustic channel indicate that the proposed algorithm has not only faster convergence rate but also less mean square error.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2010年第10期2247-2249,共3页
Journal of System Simulation
基金
全国优秀博士论文作者专项资助(200753)
江苏省高等学校自然科学基金(08KJB510010)
江苏省六大人才高峰资助项目(2008026)
江苏省自然科学基金(BK2009410)
安徽省高等学校自然科学基金(KJ2010A096)
关键词
盲均衡
正交小波变换
奇对称误差函数
水声信道
blind equalization
orthogonal wavelet transform
odd symmetry error function
underwater acoustic channel
