当信号与噪声同时输入时，在输出端能将信号尽可能精确地重现出来，而噪声却受到最大抑制，维纳滤波器就是用来解决这样一类从噪声中提取信号问题的一种滤波方法。(When the signal is input to the noise at the same time, the signal can be reproduced as accurately as possible at the output, and the noise is most suppressed. Wiener filter is used to solve such a kind of filtering method to extract the signal from the noise.)