基于最小全变差的雷达测距方法

Ranging Method Based on Total Variation Minimization

雷达波束中心距离的估计即目标区域中心相对雷达平台的距离估计是通过和差比幅的方法,找到零深所对应的距离门即为所要估计的距离。在实际情况下,由于噪声的影响很难确定零深的位置,因此距离估计精度不高。为了获得较高精度的距离提出了一种基于最小全变差的雷达测距方法,该方法能够有效地进行距离估计。通过全变差最小的方法能够很好地抑制噪声水平,提高信噪比,使得处理后的数据变得平坦,因此很容易确定和差比幅零深的位置,从而进一步确定零深所对应的距离门。仿真结果表明,该方法能够很好抑制噪声,有效提高测距精度。

The estimation of the range of the center of the radar beam,that is the range between the center of the target area and the radar platform,is determined by the method of sum-difference amplitude-comparison.The range gate corresponding to the null depth is the estimated distance.In the actual situation,it is difficult to determine the position of null depth due to the influence of noise,so the range estimation accuracy is poor.In order to obtain a high-precision range,a radar ranging method based on total variation minimization is proposed,which can effectively perform distance estimation.The method of minimizing the total variation can suppress the noise level well,improve the signal-to-noise ratio,and make the processed data flat,so it is easy to determine the position of null depth of sum-difference amplitude-comparison,thereby further determining the range gate corresponding to zero depth.Simulation results show that the method can well suppress noise and effectively improve the ranging accuracy.