MIMO雷达的目标运动方向及速度估计

Estimation of the moving angle and velocity of the target in the MIMO radar

采用多个发射机单个阵列接收机的MIMO模型,利用目标对应于各发射机和接收机的速度矢量关系合成出目标运动方向上的速度.将目标运动方向上的速度矢量投影到接收机和目标的连线方向上估计出目标径向速度,并推导出估计性能公式.理论分析和仿真结果表明:MIMO雷达对速度的估计性能与目标、发射机和接收机形成的夹角有关,夹角越大,估计误差越小.

Based on the MIMO model which has multiple spatially separated transmitters and co-located separated receivers, the moving angle and velocity are estimated by the relation between velocity vectors of a target for all transmitter-receiver pairs. Based on this estimation, the radial velocity toward the receiver is obtained by projecting the moving velocity vector onto the looking direction from receiver to target and its performance formula is achieved. Theoretical analysis and simulation results show that velocity estimation for the MIMO radar is related to the angle between the vectors from the target to the receiver and transmitters, and the greater this angle, the smaller the estimation error.