机载MIMO雷达杂波建模及杂波特性分析  

Model and Clutter Characteristics Analysis for Airborne MIMO Radar

作　　者：严韬[1] 谢文冲[1] 王永良[1] 

机构地区：[1]空军雷达学院雷达兵器运用工程重点实验室,湖北武汉430019

出　　处：《雷达科学与技术》2010年第4期289-295,共7页Radar Science and Technology

基　　金：国家杰出青年科学基金(No.60925005)

摘　　要：机载MIMO雷达通过将MIMO技术应用到机载雷达,显著增加了雷达的系统自由度,改善了机载雷达的杂波抑制性能。首先建立了机载MIMO雷达的杂波数学模型;然后给出了两种典型的正交信号形式;最后对不同信号形式和不同误差条件下机载MIMO雷达的杂波功率谱和特征谱进行了仿真分析。仿真结果表明,机载MIMO雷达与机载相控阵雷达有相似的杂波分布,但其杂波自由度显著增加;发射信号从正交向相干的退化过程中,杂波在空时二维平面形成主副瓣并逐渐锐化。Based on the application of MIMO technology to airborne radar,the degree of freedom（DOF） of system for airborne MIMO radar increases dramatically and clutter suppression performance is improved effectively.The clutter model is established firstly in this paper,and then two typical orthogonal signals are introduced.Finally the simulation for clutter power spectra and eigenspectra under different signal formats and error conditions are implemented,and the clutter characteristics are analyzed.The simulation results indicate that the distribution of clutter for airborne MIMO radar is similar to that for airborne phased array radar,but the DOF of clutter for airborne MIMO radar increases.The mainlobe and sidelobes are formed and acuminated gradually on the space-time plane when the transmitting signals degenerate from orthogonal signals to coherent signals.

关 键 词：机载MIMO雷达 杂波建模 杂波空时分布 杂波自由度 

分 类 号：TN959[电子电信—信号与信息处理]