LFMCW雷达差频信号滤波电路设计
Electronic Measurement Technology（2017）
Abstract
理想情况下LFMCW雷达差频信号在规则区内是标准正弦信号,但大量实测信号表明,差频信号中含有成分复杂的噪声信号,严重影响了雷达的测距精度.采用模拟滤波器,是滤除这些噪声信号最直接的办法.针对LFMCW雷达差频信号信号频带与噪声频带相近的特点,介绍了一种计算简单的模拟椭圆滤波器设计方法,分别设计了椭圆函数低通、高通滤波器,然后通过级联的方式构成带通滤波器.实测实验表明,该方法设计的带通滤波器可以有效地降低噪声干扰,提高LFMCW雷达差频信号质量.
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