摘要
单台雷达的定位精度低,致使多台雷达的融合定位精度较低.在多台雷达实时跟踪目标过程中,雷达的测角误差随距离的增加而增大,而测距误差变化较小.为了提高远距离目标的跟踪定位精度,本文提出了组网雷达的交会定位方法.利用至少3台雷达的测距信息,依据雷达与目标的空间几何关系,推导出该方法的数学模型,分析了定位精度的影响因素.利用组网雷达的实际测量数据进行试验,仿真结果表明,距离目标较近时交会法与融合法的定位精度相当,距离目标较远时交会法优于融合法.
In the process of real-time tracking the aerial object with multiple radars, the angle error increases with the long distance, while the ranging error changes a little, so the position accuracy of the single radar is low, which results in the low fusion accuracy of the networked radars. A real-time intersection method is put forward for improving the position precision of the long-distance flying object. Making use of the three and more radars＇ ranging information, according to the geometrical relationship between the object and the networked radars, the intersection model is deduced, and the factors of the position is analyzed. Testing the actual measure data obtained by the networked radar, the results show that the intersection error is approximately equal to the fusion error during tracking the near-distance object, the intersection error is superior to the fusion error during tracking the long-distance object, so the intersection method is reliably feasible.
出处
《测试技术学报》
2014年第4期345-348,共4页
Journal of Test and Measurement Technology
关键词
组网雷达
交会定位
融合定位
目标跟踪
加权最小二乘法
radar network
intersection location
fusion location
target tracking
weighted least square method
