基于TR技术的sin-FDA-MIMO距离角度联合估计

A Joint Range and Angle Estimation of sin-FDA-MIMO Based on TR Technology

多输入多输出正弦频控阵雷达能够对目标在空间中的距离和角度进行二维估计,如何提高估计精度尤为重要。为了提高sin-FDA-MIMO目标距离角度联合估计精度,引入时间反转技术,利用信号多路径传播的空间多样性来提高距离角度估计算法的性能。首先分析了sin-FDA-MIMO的接收信号模型,然后推导了基于TR技术的sin-FDA-MIMO雷达的接收信号模型,对两种信号接收模型分别采用Capon和MUSIC算法进行单目标和双目标距离和角度的估计。最后通过仿真验证了该方法的有效性和正确性。

The multiple-input multiple-output(MIMO)sin frequency diverse array(sin-FDA)radar being capable of estimating the angle and range of targets,how to improve the accuracy of two-dimensional estimation is still a question.For this reason,time reversal(TR)technology is introduced to utilize the spatial diversity of multipath propagation for improving the performance of range-angle estimation algorithm.At first,the receive signal model of the sin-FDA-MIMO is analyzed.Then,the receive signal model of the sin-FDA-MIMO is derived based on TR technology.The Capon and MUSIC algorithms are used to estimate both the range and angle of single target and two targets respectively for two kinds of signal receive models.Finally,the correctness of the conclusion is verified by simulation.