瞬态极化雷达接收滤波器的优化设计  

Optimization of Receiver Filter for Instantaneous Polarization Radar

作　　者：李棉全[1] 马梁[1] 李永祯[1] 刘勇[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,湖南长沙410073

出　　处：《电子学报》2010年第12期2915-2919,共5页Acta Electronica Sinica

基　　金：国家自然科学基金重点项目(No.60736006);国家自然科学基金青年科学基金项目(No.60802078)

摘　　要：针对瞬态极化雷达发射波形自相关和互相关特性相互制约的矛盾,本文对瞬态极化雷达的接收滤波器进行优化设计,以减小相同极化通道的距离旁瓣和不同极化通道之间的相互串扰,提高全极化雷达的检测和估计性能.建立了瞬态极化雷达回波信号模型,分析了目标极化散射矩阵估计的误差来源,根据估计误差函数建立优化模型,通过凸优化求解对不同极化通道的滤波器进行优化设计.分析了单个静止点目标、运动目标和多目标情况下滤波器的性能,并给出了仿真结果.最后,利用实测数据验证了本文方法的有效性.To solve the confliction between auto-correlation and cross-correlation of waveforms transmitted by instantaneous polarization radar,the receiver filter is optimized in this paper.The optimal filter is designed to decrease the interference between the range gates and channels,improve the estimation accuracy of polarization scattering matrix（PSM） and the detection performance of radar.Firstly,the target echo is modeled.The estimation error of PSM is analyzed.Secondly,the filter for each polarization channel is optimized via convex optimization,which is based on the minimum the sum of estimation error.Finally,the performance of the filter is analyzed in a variety of typical scenarios,e.g.,single stationary target,motional targets,multiple targets,etc.It is demonstrated that this method is effective by numerical examples using both simulation and experiment data.The research is valuable for the receiver design and implement of instantaneous polarization radar.

关 键 词：极化散射矩阵 瞬态极化雷达 凸优化 最优滤波器 

分 类 号：TN95[电子电信—信号与信息处理]