摘要
测量精度是雷达核心系统指标之一,工程中对其进行准确评估有着重要意义;实际应用中在利用民航广播式自动相关监视(ADS-B,automatic dependent surveillance-broadcast)数据进行精度评估时常因时间信息缺失、时间节拍不均匀等原因导致航迹点匹配误差增大,精度评估效果急剧下降甚至失效;针对上述问题对欠时间信息条件下精度评估问题进行了研究,采用了基于动态时间弯曲(DTW,dynamic time warping)算法的雷达航迹点匹配技术,利用形状信息在时间信息缺失的情况下仍能实现航迹点精确匹配从而提升评估精度;考虑到实际应用中边界束缚与计算资源限制,一种预筛选与下界加速技术被提出;然后基于实际应用中序列高维序列信息采用联合度量方法进一步提高航迹点匹配精度;最后在实际测量数据上进行验证,经实验测试表明本方法在时间信息缺失的情况下也可准确评估雷达精度,计算速度快;算法扩展了基于ADS-B数据的精度评估应用范围,具有广泛实用价值。
Measurement accuracy is one of the core system indicators of radar,and it is of great significance to accurately evaluate it in engineering;The civil aviation ADS-B data are used to evaluate the accuracy in practical applications,by lack of time information and uneven time sampling beats,the error of track matching increase causes the decrease of accuracy evaluation or even failure.In view of above problems,the problem of accuracy evaluation under the condition of lack of time information is studied,and the radar track matching technology based on the dynamic time warping(DWT)algorithm is adopted,which can still achieve the satisfactory evaluation results of radar accuracy with no time information;considering the boundary and computational resource constraints in practical applications,a pre-screened and lower bound acceleration technology is proposed;then based on the high-dimensional sequence information in the practical applications,the joint measurement method is used to further improve the matching accuracy of track points;Finally,the proposed method is verified on the actual measurement data;the experimental test shows that this method can accurately evaluate the radar accuracy even when the time information is missing,and the calculation speed is fast;The proposed algorithm is expanded the application range of the radar accuracy evaluation based on ADS-B data,which has a wide range of practical value.
作者
庞卓
詹进雄
吕永乐
PANG Zhuo;ZHAN Jinxiong;LYU Yongle(Nanjing Institute of Electronic Technology,Nanjing 210000,China)
出处
《计算机测量与控制》
2022年第11期272-278,共7页
Computer Measurement &Control
