运动双基地MIMO雷达的参数估计性能

摘要

The parameter estimation performance for the moving bistatic MIMO radar is studied. First, the bistatic MIMO radar signal model with both the transmit and receive arrays being moving is given and the general Cramer-Rao Bound (CRB) expression for the parameters of multi-target is derived. Then, the closed-form CRBs for Direction Of Departure (DOD) and Direction Of Arrival (DOA) of single target are obtained. The impact of some parameters on the CRB is analyzed when both the transmit and receive array are moving. Theoretical analyses and computer simulations show that: the DOD/DOA estimation performance will be improved as the velocity of the moving transmitter/receiver increases, while the other angle (DOA/DOD) estimation performance will degrade. When the aspect angle of moving transmitter/receiver is vertical to the DOD/DOA and the other site is parallel to the DOA/DOD, the best DOD/DOA estimation performance is obtained.%　　该文研究了收发站运动情况下双基地MIMO雷达的参数估计性能。首先，给出了运动双基地MIMO雷达的信号模型，推导出多目标下参数估计克拉美罗界(CRB)的一般表达式；其次，给出了单目标情况下发射角和接收角估计的CRB闭式解，并分析了收发站运动时，各参数对CRB的影响。理论和仿真结果表明：增大某一站(发射站/接收站)的运动速度，将提高该站所对应的角度(发射角/接收角)估计性能，但同时也降低了另一站所对应的角度估计性能；当发射站/接收站的运动视角垂直于发射角/接收角，而另一站的运动视角平行于接收角/发射角时，发射角/接收角的估计性能最优。