改进的变步长行加权仿射投影算法  

Improved variable step-size affine projection algorithm with row-weighted projection matrix

作　　者：范永全[1,2] 张家树[2] 

机构地区：[1]西华大学数学与计算机学院,四川成都610039 [2]西南交通大学信号与信息处理重点实验室,四川成都610031

出　　处：《计算机工程与设计》2010年第4期854-857,共4页Computer Engineering and Design

基　　金：国家自然科学基金项目(60572027)

摘　　要：针对带衰减因子的变步长仿射投影算法(VS-APA-FF)中加权投影矩阵容易产生病态化的问题,文献[8]提出了正则化的VS-APA-FF(VS-APA-FF-REGU)算法,但加权投影矩阵的运算量仍然较大,为此提出改进的行加权变步长仿射投影算法(VS-APA-RW)对加权投影矩阵的计算进行简化。该算法采用间歇更新的变步长策略,有效降低了的整体运算量。最后通过有色输入下的信道盲辨识表明了算法的性能。To address the potential ill-condition problem of weighted projection matrix in the variable step-size affine projection algorithm（VS-APA） with forgetting factors（VS-APA-FF）,the regulated VS-APA-FF-REGU algorithm is proposed,but the weighted projection matrix still involves large amount of calculation.So an improved VS-APA with row-weighted projection matrix（VS-APA-RW） is proposed to simplify the calculation of the weighted projection matrix;at the same time,a variable step-size with interim updating is adopted to reduce the total calculation effectively.Performance of the proposed algorithm is verified by the simulation of blind channel identification in colored input.

关 键 词：变步长 仿射投影算法 均方偏差 间歇更新 有色输入 

分 类 号：TP273.2[自动化与计算机技术—检测技术与自动化装置]