摘要
介绍了一种新体制宽带高分辨成像雷达—多部宽带高功率行波管子阵馈电、延时ISAR试验系统,重点介绍了系统设计特点,试验原理、方法、给出外场试验结果。分析了宽带信号时频转换处理法、I、Q通道1 GHz采样匹配滤波法系统失真补偿。经过外场试验,两种方法均能实现距离分辨优于0.3 m,可给出较为满意的民航飞机二维像。
A new type wideband high resolution imaging radar is introduced, which employs many new technologies, such as multiple wideband high power TWTs , sub-array feeding network and time-delaying ISAR test system. The features of system design ,the principle and methods of its experimental study are introduced in detail. The result of range test is also presented. We analyzed the Stretch method for wideband signals and compensation for system distortion in matched filter in I and Q channels with 1GHz sampling frequency. The results of range experiments demonstrate that the range resolution can be less than 0.3 m and satisfactory two-dimensional image of civil plane can be acquired with these two methods.
出处
《现代雷达》
CSCD
北大核心
2006年第2期8-10,共3页
Modern Radar
基金
国家863计划资助项目(编号2002AA731110)
关键词
宽带
逆合成孔径雷达
预失真
距离高分辨
一维像
二维像
wideband
ISAR
pre-distortion, high range resolution
one-dimensional image
two-dimensional image
