对于变步长LMS滤波算法不能同时满足较高收敛速度和较低稳态误差的矛盾,提出了基于反馈的算法思路。这种思想思路是在原有算法的基础上,引入反馈参数的数学关系式。然后,对改进算法的各个的参数进行仿真分析,得出最佳的参数取值。仿真结果表明:改进算法的性能得到大幅的提升。在对回波信号的滤波处理过程中,改进算法的滤波特性,即误差抑制的能力得到成倍的增加,滤波的效果很好。
For the contradiction that the variable step size LMS filtering algorithm can not satisfy the higher convergence speed and the lower steady-state error at the same time, the feedback-based algorithm is proposed. This idea is based on the original algorithm, introducing the mathematical relationship of feedback parameters. Then, each parameter of the improved algorithm is simulated and analyzed to obtain the optimal parameter value. Simulation results show that the performance of the improved algorithm is greatly improved. In the filtering process of the echo signal, the filter characteristics of the improved algorithm, ie the ability of error suppression, are multiplied, and the filtering effect is very good.
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