虚拟子阵平滑算法

许红波; 王怀军; 黄春琳; 粟毅

doi:10.3724/SP.J.1146.2008.00671

虚拟子阵平滑算法

doi: 10.3724/SP.J.1146.2008.00671

基金项目:

国家自然科学基金(60602022)资助课题

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出版历程
- 收稿日期: 2008-05-30
- 修回日期: 2008-11-20
- 刊出日期: 2009-06-19

Virtual Subarrays Smoothing Algorithm

摘要

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，当接收阵列具有个阵元时，最大可分辨的相干数目为。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。
- 信号处理;主动阵列;正交信号;虚拟子阵;波达方向
Abstract: 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 identical sensors avoid the reduction of the array effective aperture, and make this approach estimate coherent returns at most. Simulation results show that the VSS algorithm is effective and need only a little sensors transmitting signals.

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