中文说明：
设计最小二乘逆滤波器求解反卷积问题,假设有观测噪声,为降低观测噪声的影响，可采用预白化方法,设计长度N=50的最小平方FIR逆滤波器。
English Description：
The least square inverse filter is designed to solve the deconvolution problem, assuming that there is observation noise. In order to reduce the influence of observation noise, we can use the pre whitening method to design the least square fir inverse filter with length n = 50.