设计一个2阶加权自适应噪声对消器，对经加性白高斯噪声信道干扰的正弦信号进行滤波。-Design a two-order-weighted adaptive noise canceller, right through the additive white Gaussian noise channel interference sinusoidal signal filtering.

LMS Matlab function, which can be used in your main programs (Adaptive noise canceller applications).