基于嵌入式系统的自适应滤波器研究

Research on Adaptive Filter based on Embedded System

自适应滤波器具有在未知环境下良好的运作并跟踪输入统计量随时间变化的能力。其原理就是利用前一时刻已获得的滤波参数,自动调节现时刻的滤波参数,从而达到对当前信号进行最优化滤波的目标。本系统以STM32为核心,实现自适应滤波器的算法,以A/D、D/A模块为辅助,实现对模拟有用信号和干扰信号的采集,以及原始信号的恢复。

Adaptive filters have a good operation in the unknown environment and follow the ability of the input statistics to change with time.Its principle is to use the filter parameters that have been obtained in the first time,and automatically adjust the filter parameters of the moment,thus achieving the target of the most optimized filter for the current signal.This system is the core of the system,and the algorithm of adaptive filter is realized.With a/d,d/a module,to achieve the acquisition of useful signals and interference signals,as well as the restoration of the or iginal signal.