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研究了话音通信中的回波抵消问题，尤其是传统ＬＭＳ算法的收敛性问题。提出了一种加白化预滤波的块修正ＬＭＳ自适应抵消算法（ＷＢＬＭＳ）。计算机模拟结果表明，ＷＢＬＭＳ算法的收敛性明显优于传统的ＬＭＳ算法，增加的运算量也极少。
The problem of echo cancellation in speech communication is studied, especially the convergence of traditional LMS algorithm. A whitening pre-filtering block-adaptive LMS adaptive cancellation algorithm (WBLMS) is proposed. Computer simulation results show that the convergence of WBLMS algorithm is obviously better than the traditional LMS algorithm, and the computational complexity is also very small.