计算机工程与设计
計算機工程與設計
계산궤공정여설계
COMPUTER ENGINEERING AND DESIGN
2010年
4期
854-857
,共4页
变步长%仿射投影算法%均方偏差%间歇更新%有色输入
變步長%倣射投影算法%均方偏差%間歇更新%有色輸入
변보장%방사투영산법%균방편차%간헐경신%유색수입
variable step-size%APA%mean square deviation%interim updating%colored input
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.
針對帶衰減因子的變步長倣射投影算法(VS-APA-FF)中加權投影矩陣容易產生病態化的問題,文獻[8]提齣瞭正則化的VS-APA-FF(vs-APA-FF-REGU)算法,但加權投影矩陣的運算量仍然較大,為此提齣改進的行加權變步長倣射投影算法(VS-APA-RW)對加權投影矩陣的計算進行簡化.該算法採用間歇更新的變步長策略,有效降低瞭的整體運算量.最後通過有色輸入下的信道盲辨識錶明瞭算法的性能.
침대대쇠감인자적변보장방사투영산법(VS-APA-FF)중가권투영구진용역산생병태화적문제,문헌[8]제출료정칙화적VS-APA-FF(vs-APA-FF-REGU)산법,단가권투영구진적운산량잉연교대,위차제출개진적행가권변보장방사투영산법(VS-APA-RW)대가권투영구진적계산진행간화.해산법채용간헐경신적변보장책략,유효강저료적정체운산량.최후통과유색수입하적신도맹변식표명료산법적성능.
To address the potential ill-condition problem of weighted projection matrix in the variable step-size affine projection Mgorithm (VS-APA)with forgetting factors(VS-APA-FF),the regulated VS-AFA-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.
