解相关仿射投影算法及应用  

Decorrelation affine projection algorithm and its application

作　　者：文昊翔[1,2] 陈隆道[1] 蔡忠法[1] 

机构地区：[1]浙江大学电气工程学院,浙江杭州310027 [2]韶关学院物理与机电工程学院,广东韶关512205

出　　处：《浙江大学学报（工学版）》2014年第1期136-140,共5页Journal of Zhejiang University：Engineering Science

摘　　要：为了提高自适应算法工作于强相关信号输入时的收敛速度,提出解相关仿射投影算法(DAPA).DAPA对输入信号矩阵进行预处理以解除不同时刻输入信号的相关性;利用输入矩阵的正交分量更新滤波器系数,对收敛步长进行优化以使后验误差最小化.将DAPA应用于回声消除系统,用有色噪声及真实语音信号进行仿真.结果表明,DAPA收敛速度快,计算复杂度适中.A decorrelation affine projection algorithm （DAPA） was proposed to increase the convergence rate when the input signal is highly correlated. The input signal matrix was preprocessed to eliminate its correlation at different time instant. Then date the coefficients of the adaptive filter. The DAPA was used in echo cancellation quence. Experimental results indicate that the orthogonal component of The step-size was optimized the input matrix was used to up to minimize the posteriori error. system for simulation with colored noise and rea fast convergence rate is achieved and computationa speech se- complexityis moderate.

关 键 词：自适应算法 仿射投影算法 解相关 回声消除 

分 类 号：TM714[电气工程—电力系统及自动化]