分布式全相参雷达相干参数估计性能  

Coherent Parameters Estimation Performance for Distributed Aperture Coherent Radar

作　　者：宋靖[1] 张剑云[1] 郑志东[1] 何伟[1] 

机构地区：[1]电子工程学院,合肥230037

出　　处：《电子与信息学报》2014年第8期1926-1931,共6页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(60702015)资助课题

摘　　要：针对部分收发共置的分布式全相参雷达,该文首先建立了"全发任意收"的混合结构,然后在发射多脉冲条件下推导了相干参数估计的克拉美-罗界(CRB)闭式解,研究了相干参数估计性能与收发天线数及脉冲数之间关系。结论表明:共置天线较分置天线能够获得更低的相干参数估计CRB,增加收发天线数或脉冲数,能够降低相干参数估计CRB。最后的仿真实验验证了研究结论的正确性。A hybrid signal processing architecture characterized by ＂all transmit and any receive＂ is proposed firstly for distributed aperture coherent radar when receivers are co-located with partial transmitters. Then the closed-form Cramer-Rao Bounds（CRB） of coherence parameters estimation are derived under the condition that multiple pulses are transmitted, and the relationship among estimation performance and the number of antennas and pulses is studied. It is concluded that the CRB of parameters estimation for co-located antennas is slower than that for bistatic antennas, and the CRB reduces with the increase of the number of antennas and pulses. Finally, the numerical examples demonstrate the validity of the theoretical results.

关 键 词：雷达 分布式 全相参 克拉美-罗界 费歇尔信息矩阵 

分 类 号：TN957.51[电子电信—信号与信息处理]