一引言估计被相加性噪声所掩盖的信号的常用方法是采用一个滤波器,信号能不大失真地通过这样的滤波器而噪声被抑制。这类滤波器的设计是属于最佳滤波器范畴。先驱者维纳创建了此滤波理论,此后由卡尔曼、波色和其他学者的研究工作推广和提高了维纳滤波理论。用作上述目的的滤波器可以是固定式的也可自适应式的。固定式滤波器的设计是基于信 An Introduction A common method of estimating signals masked by additive noise is to use a filter through which the signal passes without distortion and noise is suppressed. This type of filter design is the best filter category. Wiener, the pioneer, created this filter theory, and Wiener filter theory was later promoted and enhanced by research work by Culman, Bechtel and other scholars. The filters used for this purpose may be fixed or adaptive. Fixed filter design is based on the letter