虚拟子阵平滑算法  

Virtual Subarrays Smoothing Algorithm

作　　者：许红波[1] 王怀军[1] 黄春琳[1] 粟毅[1] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073

出　　处：《电子与信息学报》2009年第6期1367-1370,共4页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(60602022)资助课题

摘　　要：主动阵列发射正交信号可以极大地扩展阵列的虚拟孔径,阵列的自由度成几何增长。该文利用主动阵列发射同频带时域正交PCM信号构造的虚拟子阵,提出了一种虚拟子阵平滑(VSS)算法,可解决不同目标回波信号相干的问题。该算法避免了接收阵列物理孔径的损失,当接收阵列具有M个阵元时,最大可分辨的相干数目为M?1。仿真实验表明VSS算法的有效性,而且该算法只需要较少的阵元发射信号。The active arrays can extend the virtual aperture greatly by transmitting orthogonal signals, and degrees of freedom are increased exponentially. In this paper, By transmitting orthogonal signals , virtual subarrays are designed, and the Virtual Subarrays Smoothing（VSS） algorithm is proposed for the coherent case. Virtual subarrays with M identical sensors avoid the reduction of the array effective aperture, and make this approach estimate M - 1 coherent returns at most. Simulation results show that the VSS algorithm is effective and need only a little sensors transmitting signals.

关 键 词：信号处理 主动阵列 正交信号 虚拟子阵 波达方向 

分 类 号：TN911.7[电子电信—通信与信息系统]