带旋转因子的多路回波消除自适应滤波算法简化

Simplification of NLMS-RF algorithm

对带旋转因子的多路回波消除自适应滤波算法(NLMS RF)中的旋转因子的取值进行了分析,给出了NLMS RF算法及其扩展的带旋转因子的多路仿射投影算法(APA RF)的一种简化形式。这种简化是通过使算法中"预处理"后的输入向量相互正交而实现的。简化后的算法无需对旋转因子的取值进行选取,并降低了算法的计算复杂度。通过计算机数值模拟仿真实验表明了简化后的算法的有效性。

After analyzing the rotating factors in the NLMS-RF algorithm, the simplified NLMS-RF algorithm and the simplified APA-RF algorithm are proposed by orthogonalizing the 'pre-processed' input signal vectors in the NLMS-RF algorithm. The computational complexity of the simplified NLMS-RF algorithm and the simplified APA-RF algorithm is lower than that of the NLMS-RF and the APA-RF algorithms respectively because the rotating factor is unneceseary to select the value in the simplified algorithms. Computer simulation results indicate that the simplified algorithms are effective in multi-channel echo cancellation.\;