多通道阵列相干源波达方向超分辨估计  

Super-resolution Estimation of DOA of Coherent Source With Multi-channel Arrays

作　　者：万山虎[1] 许红波[2] 丁建江[2] 靳彤 

机构地区：[1]空军预警学院二系 [2]空军预警学院空天预警实验室 [3]61541部队

出　　处：《空军雷达学院学报》2012年第6期391-393,418,共4页Journal of Air Force Radar Academy

基　　金：国家自然科学基金资助项目(61179015);湖北省自然科学基金资助项目(2010CDB03701)

摘　　要：采用发射阵列分布式布阵、接收阵列密布阵的多通道阵列,提出了一种虚拟子阵积累算法,在获得空间分集增益的同时可以超分辨估计相干源的波达方向.先通过正交信号分选的方法在接收端得到虚拟子阵,然后叠加积累各虚拟子阵接收数据的协方差.该算法利用空间分集克服了目标闪烁,同时具备解相干的能力,且避免阵列物理孔径的损失.理论分析和仿真结果表明,该算法可以有效处理多通道阵列相干源波达方向估计.In this paper,a virtual sub-array accumulation（VSA） algorithm is proposed by using the multi-channel arrays where the transmitting arrays are of distributed arraying and the receiving arrays are of close arraying,by which,the super-resolution estimation of direction-of-arrival（DOA） of coherent source can be performed,while attaining the spatial diversity gain.By taking the orthogonal signal sorting scheme,the virtual sub-array can be achieved in the receiver,and then the covariance of received data out of each sub-array accumulated.By using the space diversity,this algorithm can get over the target scintillations,be of de-coherence capability and avoid the loss of array physical aperture.Theoretical analysis and its simulation results prove the proposed algorithm to be effective in estimation of the DOA of coherent source with multi-channel arrays.

关 键 词：阵列信号处理 多通道阵列 波达方向 超分辨估计 

分 类 号：TN957.52[电子电信—信号与信息处理]