基于K60的自适应滤波器的设计

Design of Adaptive Filter based on K60

自适应滤波器是指根据环境的改变,使用自适应算法来改变滤波器的参数和结构的滤波器。自适应滤波器的最重要的特征就在于它能够在未知环境中有效工作,并能够跟踪输入信号的时变特征。本次的设计主要由加法器、移相电路和自适应滤波器组成。设计采用加法器将有用信号与干扰信号叠加成混合信号,移相电路能做到将10KHz-100KHz的混合信号进行0-180度移相。通过自适应滤波器,采用干扰抵消等方法,滤除干扰信号,能从混合信号中恢复出有用信号。

Adaptive filters refer to changes in the environment,An adaptive algorithm is used to change the parameters and structure of the filter.The most important feature of an adaptive filter is its ability to work effectively in an unknown environment.And it can track the time-varying characteristics of the inputing signal.The phase shift circuit and adaptive filter are designed to superposition the useful signal and the interference signal to form a mixed signal.The phase shift circuit can carry out 0-180 degree phase shift of the 10KHz-100KHz mixed signal.By using interference cancellation and other methods,the interference signal can be filtered out and useful signal can be recovered from the mixed signal.