仿射投影算法中的步长控制

摘要

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.%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.