机载分布式相干MIMO雷达的杂波谱分析  

Study on Clutter Spectrum of Airborne Distributed Coherent MIMO Radar

作　　者：匡云连 陆军[2] 胡光岷[1] 

机构地区：[1]电子科技大学通信与信息工程学院,成都611731 [2]中国电子科学研究院,北京100041

出　　处：《中国电子科学研究院学报》2014年第1期59-63,共5页Journal of China Academy of Electronics and Information Technology

基　　金：国家预研项目(7131020)

摘　　要：以多载频矩形脉冲信号为发射信号,建立了机载分布式相干MIMO雷达的杂波模型;给出了经典的杂波功率谱估计方法和杂波自由度估计规则;仿真分析了多载频频率步进和不同误差条件下的最小方差(MV,minimum variance)杂波谱和杂波特征谱。仿真及分析结果表明:机载分布式相干MIMO雷达的杂波具有空时二维斜对角分布特性;杂波起伏、载机偏航均会使杂波谱展宽及杂波自由度增大;多载频频率步进的增长导致杂波去相关。The model of clutter for airborne distributed coherent MIMO radar by transmitting multi-carrier rectangle pulse signal is built. The typical clutter spectrum estimator and clutter freedom estimation rule are listed. The clutter spectrum and clutter characteristics of clutter rank with different transmit frequen- cies and different errors are shown. The analysis results show minimum variance clutter spectrum emerges the clutter with diagonal property in the space-time category. The clutter spectrum spreads and clutter de- gree of freedom increases because of the fluctuation of clutter and the yaw angle, even blends for Multi- Carrier airborne distributed coherent MIMO radar, the increase of transmit frequency step degrades the relation of clutter.

关 键 词：多载频 机载MIMO雷达 杂波自由度 杂波谱 

分 类 号：TN957.51[电子电信—信号与信息处理]