基于无源信标的天波OTHR目标跟踪

为了削弱电离层分层结构引起的"多径"效应,减小电离层高度难以准确获取带来的跟踪误差,提出了基于无源信标的目标跟踪方法。通过雷达发射高频信号,建立等效电离层传播模型,并利用无源信标修正电离层高度,其中跟踪过程分为两个阶段:先进行初次跟踪,将跟踪结果与信标对比,反演出等效电离层虚高,再利用修正虚高跟踪未知目标。针对实测数据的分析结果表明,与多假设航迹融合算法相比,本方法具有更高的精确性和适应性。

An OTHR Target Tracking Technology Based on Passive Beacon

In order to weaken the multipath effect caused by the ionosphere layered structure, and reduce the tracking error due to the ionospheric height is difficult to accurately obtain, in this paper, a target tracking method based on passive beacon is developed. By radar transmitting high frequency signal, equivalent ionosphere propagation model is established, and the ionospheric height is modified by passive beacon, the tracking process is divided into two stages: first, an initial tracking, the tracking results are compared with passive beacon to achieve the equivalent ionospheric height, then tracking unknown targets using the modified height. According to the analysis of the measured data,the results indicate that this method has higher precision and adaptability, compared with the multiple hypothesis tracking fusion algorithm.