双基地MIMO雷达高速运动目标的DOD和DOA联合估计

高速目标在回波积累时间内会跨多个距离单元运动，因此双基地MIMO雷达利用单个距离单元上的目标回波数据估计目标发射角(DOD)和接收角(DOA)会产生较大误差，影响目标的交叉定位。该文根据高速目标回波特点提出一种双基地MIMO雷达的跨距离单元估计目标多维参数的方法，该方法把目标在不同距离单元上的脉冲压缩数据的采样协方差矩阵进行平均，提高其协方差矩阵的估计精度，然后采用超分辨算法进行DOD和DOA参数估计。仿真结果表明该方法对高速运动目标的角度估计精度高于现有算法，接近于现有算法在目标无距离走动时的角度估计精度，且其角度估计性能与目标跨越的距离单元数无关。

Joint DOD and DOA Estimation of High Speed Moving Target in Bistatic MIMO Radar

Owning to the fact that the high speed moving target moves across several range cells during the long coherent observation period, joint Direction Of Departures (DODs) and Direction Of Arrivals (DOAs) estimation with the echo data located at the single rang cell has considerable error that affect the cross-positioning for the high speed moving targets in bistatic MIMO radar. A method for estimating the parameters of high speed moving targets is presented. The average of the sample covariance matrixes estimated from the pulse compression outputs at different range cells is exploited to obtain the high precision estimation of the covariance matrix. Then, DODs and DOAs of targets can be estimated by using the traditional supper-resolution algorithm. The simulation results indicate that the angle estimation accuracy of the proposed method for the high speed moving targets, which is independent of the number of range cells that target moves across, is better than that of the existence approaches, and is close to that of the existence approaches with no range migration occurrence.