基于改进的重心插值提高脉冲雷达测距精度的研究  

Research on Improving Pulse Radar Ranging Accuracy Based on the Improved Center of Gravity Interpolation

作　　者：马兰 李照照[1] 扈月松 井伟[1] 杨雪林 MA Lan;LI Zhao-zhao;HU Yue-song;JING Wei;YANG Xue-lin(Xi’an Electronic Engineering Research Institute,Xi’an 710100,China;Test and Measurement Institute of China North Industries,Weinan 714200,China)

机构地区：[1]西安电子工程研究所,西安710100 [2]中国兵器工业试验测试研究院,陕西渭南714200

出　　处：《火力与指挥控制》2022年第3期97-104,共8页Fire Control & Command Control

基　　金：装备发展部“十三五”预研课题基金资助项目(YGY17ZT201)。

摘　　要：由于采样率的约束,雷达回波信号脉压结果是一系列离散的采样点,用脉冲法实现雷达测距时会产生距离量化误差,需要对脉压波形峰值时间作插值估计。针对传统重心插值法存在固有误差较大的问题,提出了一种改进的重心插值法。结合先验信息,通过在较高采样率下作仿真实验,得到脉压结果主瓣内不同位置下采样最大值和相邻次大值点的幅值比与脉压波形峰值位置的一一对应关系,利用这一关系对实际采样率下主瓣内的采样最大值和相邻次大值点作重心插值处理,实现对脉压波形峰值时间更精确的预估。实验结果表明,通过所提出的方法可以显著减小距离量化误差,提高雷达测距精度。Due to the constraints of sampling rates,the pulse pressure result of radar echo signals is a series of discrete sampling points.When radar ranging is realized by pulse method,range quantization error will occur,the peak time of pulse pressure waveform is needed as interpolation estimetion.Aiming at the large inherent errors of the traditional center of gravity interpolation method,an improved the center of gravity interpolation method is proposed.Combined with the prior information,the one-to-one correspondence relationship between the amplitude ratio of the maximum value and the adjacent submaximum point of adjacent in the main lobe of the pulse pressure results and the peak position of the pulse pressure waveform is obtained through the simulation experiment at a higher sampling rate.By using this relationship,the center of gravity interpolation is applied to the sampling maximum and the adjacent submaximum point in the main lobe under the actual sampling rate,more accurate estimation of peak time of pulse pressure waveform is realized.The experimental results show that the proposed method can significantly reduce the range quentization error and can improve the radar ranging accuracy.

关 键 词：距离量化误差 重心插值 预估峰值时间 测距精度 

分 类 号：TN95[电子电信—信号与信息处理]