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J4  2014, Vol. 48 Issue (1): 136-140    DOI: 10.3785/j.issn.1008-973X.2014.01.021
    
Decorrelation affine projection algorithm and its application
WEN Hao-xiang1,2, CHEN Long-dao1, CAI Zhong-fa1
1.College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China;2.School of Physics and
Mechanical and Electrical Engineering, Shaoguan University, Shaoguan 512205,China
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Abstract  

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 the orthogonal component of the input matrix was used to update the coefficients of the adaptive filter. The step-size was optimized to minimize the posteriori error. The DAPA was used in echo cancellation system for simulation with colored noise and real speech sequence. Experimental results indicate that fast convergence rate is achieved and computational complexity is moderate.



Published: 01 January 2014
CLC:  TM 714  
Cite this article:

WEN Hao-xiang, CHEN Long-dao, CAI Zhong-fa. Decorrelation affine projection algorithm and its application. J4, 2014, 48(1): 136-140.

URL:

http://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2014.01.021     OR     http://www.zjujournals.com/eng/Y2014/V48/I1/136


解相关仿射投影算法及应用

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. 

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