说明：  利用自适应RLS算法消除信号中的工频干扰，纯净信号选为数字调幅信号8ASK，工频干扰为一余弦信号，滤波后取得的很好的效果。
(Adaptive RLS algorithm for the elimination of the use of signal-frequency interference, and pure signal selected as the digital AM signal 8ASK, power-line interference is a cosine signal, after filtering achieved very good results.)