针对静止单站红外传感器纯方位目标跟踪问题,在三角函数余切关系定理2的基础上,假设目标作匀速直线运动,利用采样的方位序列,估计目标航迹方向,预测传感器下一时刻的测量方向。进一步研究了增大跨度(相邻采样点之间的间隔称为跨度)对于纯方位目标航迹参数计算精度的影响。采用平均值的方法计算航迹参数,并用Cramer-Rao下界进行误差分析,仿真实验表明,适当增大跨度能一定程度上提高精度。

Aiming at bearing-only target tracking for static single station infrared sensor, based on improved trigonometric cotangent relations theorem, assuming that the target moves uniformly and in a straight line, estimating the target track direction with sampling bearing sequence. Further studies on the influence of increasing the span (the interval between the sampling points) on the calculation of the parameters. The track parameters are calculated by means of mean value, and the error is analyzed by the Cramer-Rao lower band, simulation experiments show that increasing the span properly can improve the accuracy to a certain extent.