线性调频信号两种加权滤波的等价性  

Equivalency of Weighted Match Filter and Cross-correlator of LFM Signal

作　　者：陈希信[1] 

机构地区：[1]南京电子技术研究所,南京210039

出　　处：《现代雷达》2011年第10期47-50,共4页Modern Radar

摘　　要：在雷达信号处理中,雷达接收的线性调频信号通常要输入匹配滤波器或者互相关器进行处理,并且采用各种窗函数降低压缩脉冲的距离副瓣。文中以采用海明窗降低副瓣为例,证明了大时宽带宽积线性调频信号的加权匹配滤波器和互相关器输出近似等价,然后利用仿真实例对此加以检验。当采用其他余弦型窗降低副瓣时,其近似等价关系保持不变。In radar signal processing the received linear frequency-modulated （LFM） echo signals are usually input into the match filter or the cross-correlator to raise signal-noise-ratio and range resolution, and every different kind of window function is used to lower the range sidelobe of compressed pulse at output. Taking an example of hamming window, the approximate equivalency of outputs from the match filter and the cross-correlator for LFM signal with large time-bandwidth product is proved in this paper, and then two simulation examples are presented. The approximate equivalency still keeps when other cosine-type window is utilized.

关 键 词：线性调频信号 匹配滤波器 互相关器 海明窗 

分 类 号：TN957.51[电子电信—信号与信息处理]