一种简化的网络回声消除算法

针对网络回波抵消器中大量抽头系数需要更新的问题,提出一种基于集员滤波和Mmax局部迭代策略的符号数据归一化LMS算法。仿真与实验结果表明：由于每次迭代将对误差性能贡献最大的输入信号筛选出来作为输入,从而提高集员滤波算法的稳态性能,并加快符号数据归一化LMS算法的收敛速度,同时还能够减少算法的运算量。

A Simplified Network Echo Cancellation Algorithm

To deal with this obstacle that the large number of filter coefficients diminishes the usefulness of the adaptive filtering algorithm owing to increased complexity, summarizes some partial-update adaptive signal processing algorithms. Simulation results verify not only the set-membership filtering adaptation algorithm with partial updating can further reduce the computational complexity when compared with the set-membership Sign-Data-NLMS algorithm but can also perform better to their conventional counterparts.