雷达宽带与窄带回波信噪比对比分析  

Analysis of SNR Differences Between Wideband and Narrowband Radar

作　　者：桑玉杰[1] 王洋[1] 郭汝江[1] 

机构地区：[1]南京电子技术研究所,南京210039

出　　处：《现代雷达》2013年第10期27-31,35,共6页Modern Radar

摘　　要：为推进宽带检测理论的研究,文中对宽带与窄带回波信噪比进行了对比分析,给出几种比较有代表性的宽带回波信号的信噪比定义方法。利用线性调频信号经无源脉冲压缩网络的能量守恒性质和窄带信号是由宽带信号子回波矢量合成的理论,对宽带和窄带信号信噪比的对应情况进行了理论推导和仿真分析,结合实测数据的统计分析结果,得出一定条件下,雷达宽带与窄带回波信号的信噪比存在着比较明确对应关系,宽带功率法定义的宽带信噪比与窄带信噪比的变化趋势一致性更好,而峰值法定义的宽带信噪比更有利于目标检测等结论。To improve the research on target detection of wideband,Analysis of SNR differences between wideband and narrowband radar are gave in this article and seval definition methods for wideband SNR are gave. Using the property of conversation of energy when the LFM signal through the passive pulse compression net,and the narrowband signal is vector composed by the echos of wideband signal,analysing the SNR relation between wideband and narrowband signal,educing the result and connection between them. Finally,making the statistical analysis on the SNR of the measured data,and the result is correspond with the conclusion of theory. All of these show that when the conditions are assumed,the corresponding relations between wideband SNR and narrowband SNR are explicated. On the basis of those analysis and comparisons,the power SNR of wideband can reflect the SNR's tendency of narrowband better and peak value SNR favor the target detection.

关 键 词：宽带雷达 窄带信号 信噪比 脉冲压缩 目标检测 

分 类 号：TN957.51[电子电信—信号与信息处理]