基于传播算子的机载前视阵雷达杂波谱补偿方法  

Compensation of Clutter Spectrum for Airborne Lorward-Looking Radar Based on the Propagator

作　　者：姜晖[1,2] 廖桂生[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071 [2]西安邮电学院通信与信息工程学院,陕西西安710121

出　　处：《电子学报》2010年第9期2205-2208,共4页Acta Electronica Sinica

基　　金：国家杰出青年科学基金项目(No.60825104);国家自然科学基金资助项目(No.60736009);教育部长江学者和创新团队支持计划(No.IRT0645)

摘　　要：针对机载前视阵中杂波多普勒频率随距离发生变化,导致杂波谱在距离上呈现严重的非平稳性,因此根据杂波模型提出了一种新的杂波谱补偿方法,该方法首先对接收数据进行分块处理来构造传播算子以获得杂波子空间,再将训练单元的杂波子空间向待检单元的杂波子空间进行投影得到一个变换矩阵,然后用这个变换矩阵对数据进行处理,使杂波谱得到补偿,最后利用空时自适应算法对补偿后的数据进行杂波抑制.仿真结果表明此方法有效地抑制杂波的非平稳性,提高了雷达抑制杂波的性能.The clutter spectrum depends highly on range for forward-looking radar,which results in heterogeneous ground clutter and inaccurately estimation of clutter covariance matrix in space-time adaptive processing（STAP）.According to the clutter model,a new method for the range-dependence of clutter spectrum is proposed.The method firstly partitions the data to construct a propagator,and then obtains a clutter subspace spanned by the propagator.Secondly,a transform matrix can be obtained by fitting the clutter subspace of the range gate under test with that of secondary range gate.Thirdly,the transform matrix is used to process the data that can compensate clutter spectrum and generate sufficient data to construct a new covariance matrix.Finally,the conventional STAP could be applied to the clutter suppression.Simulation results verify the effectiveness of the proposed method.

关 键 词：传播算子 前视阵雷达 杂波谱补偿 

分 类 号：TN959.73[电子电信—信号与信息处理]