MIMO阵列雷达检测中的自适应空时编码设计

Adaptive Space-time Coding Design for MIMO Array Radar Detection

该文从改善MIMO阵列雷达检测性能的角度研究了自适应空时编码的设计问题,考虑了多目标环境、杂波复幅度的空时相关性及其自适应估计等较为复杂的情况,推导了最优准则以及两种次优准则的空时编码设计公式,阐述了3种准则之间以及它们与正交空时编码设计和发射波束方向图匹配设计准则之间的联系与区别。仿真结果表明,相对于非自适应的正交空时编码设计,3种具有自适应能力的设计准则得出的空时编码矢量都能较大程度地提高检测器输出的信号杂波噪声比,达到了改善MIMO阵列雷达检测性能的目的。

Adaptive space-time coding design is investigated for improving the detection performance of MIMO array radar,with multiple targets and space-time correlation property of clutter RCS considered in this paper.Optimal principle and two suboptimal principles are derived for adaptive space-time coding design,and the interrelation among the three principles,orthogonal space-time coding design and beampattern matching design is clarified.The numerical simulations show that all of the adaptive space-time coding vectors designed by the three principles can significantly enhance the signal-to-clutter plus noise-ratio at the output of the detector,and thus improve the detection performance of the MIMO array radar.