一种新的变步长LMS算法及其应用  

A New Variable Step-Size LMS Algorithm and Its Applications

作　　者：孙娟[1] 王俊[1] 刘斌[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071

出　　处：《雷达科学与技术》2007年第5期379-383,共5页Radar Science and Technology

摘　　要：提出了一种新的变步长LMS算法,该算法采用相对的误差互相关函数来控制步长更新。理论分析与计算机仿真结果都表明该算法收敛速度快、失调量小、稳定性好,且在低信噪比的环境中比其他同类算法有更好的性能。该算法的优越性在于计算量小且不受已存在的不相关噪声的影响,可很好地应用于实际信号处理中。A new variable step-size LMS adaptive filtering algorithm is presented in this paper, which adjusts its step-size according to the cross-correlation function of relative output error signal. Computer simulation results confirm the theoretical analysis and show that this algorithm have faster convergence rate, smaller misadjustment, and better stability. Also, it can achieve better performance in lower SNR situation. The superiority of this algorithm is that it has smaller computational complexity and is not influenced by existing uncorrelated noise. Thus it can be applied perfectly in practical signal processing.

关 键 词：自适应滤波 变步长自适应滤波算法 收敛 失调 自适应杂波相消 

分 类 号：TN957.51[电子电信—信号与信息处理]