Step size control in affine projection algorithm

Computer Engineering and Applications ›› 2011, Vol. 47 ›› Issue (11): 112-113.

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Step size control in affine projection algorithm

ZHAO Yu，LI Feng

Department of Electronic Engineering，School of Information Science and Engineering，Fudan University，Shanghai 200433，China

Received:1900-01-01 Revised:1900-01-01 Online:2011-04-11 Published:2011-04-11

仿射投影算法中的步长控制

赵愉，李锋

复旦大学信息学院电子工程系，上海 200433

Abstract

Abstract: The step size of affine projection algorithm is controlled according to the conditions on fast convergence speed，and a new variable step size affine projection algorithm（VSSAPA） is proposed.The step size of the algorithm is adjusted automatically with the variation of the output error to reduce the steady-state MSE.When the proposed algorithm is used in system identification，it has the faster convergence rate and lower means square error.

Key words: affine projection algorithm, variable step size, system identification, mean square error

摘要： 依据仿射投影算法均方误差（MSE）的最快收敛速度条件，对算法迭代过程中的步长进行控制，提出了一种新的变步长仿射投影算法（VSSAPA）。该算法使步长随着输出误差的变化而自动调整，从而降低稳态误差。将提出的算法应用于系统辨识，结果表明，与传统仿射投影算法和变步长仿射投影算法相比该算法具有更低的稳态误差和更快的收敛速度。

关键词: 仿射投影算法, 变步长, 系统辨识, 稳态误差

ZHAO Yu，LI Feng. Step size control in affine projection algorithm[J]. Computer Engineering and Applications, 2011, 47(11): 112-113.

赵愉，李锋. 仿射投影算法中的步长控制[J]. 计算机工程与应用, 2011, 47(11): 112-113.

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Step size control in affine projection algorithm

仿射投影算法中的步长控制

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