设计一个自适应滤波器，对信号x(n)进行分离/滤波,滤波器H(z)的系数根据误差信号e(n)，通过一定的自适应算法，不断地进行改变，使得输出y(n)尽量接近期望信号d(n)-Design of an adaptive filter, the signal x (n) are separated/filtered, the filter H (z) coefficient according to the error signal e (n), by a certain adaptive algorithm, constantly changing, so that the output y ( n) as close to the desired signal d (n)