新体制极化测量雷达的瞬态极化测量性能分析  

Performance Analysis of Instantaneous Polarization Measurement of New Polaimetric Radar System

作　　者：刘勇[1] 戴幻尧[1] 常宇亮[1] 李永祯[1] 李棉全[1] 王雪松[1] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073

出　　处：《中国电子科学研究院学报》2010年第2期126-133,共8页Journal of China Academy of Electronics and Information Technology

基　　金：国家自然科学基金重点项目(60736006);国家自然科学基金青年科学基金项目(60802078)

摘　　要：瞬态极化雷达采用"同时发射、同时接收"的测量体制,可以利用正交极化通道的单次回波信号测量目标极化散射矩阵。首先给出了窄带瞬态极化雷达信号模型和信号处理方法;然后详细分析了两类瞬态极化雷达信号波形(频移脉冲矢量波形和正负调频斜率LFM矢量波形)的测量性能;最后用国防科技大学研制的X波段瞬态极化雷达系统开展外场实验,实验结果表明:与分时极化测量结果相比,两者的相对幅度测量结果差异小于2 dB,相对相位测量结果差异小于10,°从而验证了瞬时极化测量的有效性。Adopting ＂simultaneous transmitting,simultaneous receiving＂ operational scheme,the instantaneous polarization radar（IPR） can obtain the target polarization scattering matrix（PSM） using only once target echoed signals in two orthogonal polarized channels.Firstly,signal model and signal process are given under narrowband condition.Secondly,measurement performance of two typical instantaneous polarization radar waveforms is analyzed in detail,including frequency-shifted-pulse-vector waveform and up-down-LFM-vector waveform.Finally,field experiments are carried out using X-band instantaneous polarization radar designed by National University of Defense Technology（NUDT）,China.Compared with results obtained by alternative polarization measurement scheme,we find the difference of relative amplitude measurement results is smaller than 2 dB,while that of relative phase measurement results is smaller than 10 degree,which demonstrates the validity of the instantaneous polarization measurement scheme.

关 键 词：极化散射矩阵 分时极化测量 瞬时极化测量 瞬态极化雷达 外场实验 

分 类 号：TN958[电子电信—信号与信息处理]