四站无解及模糊问题的增站处理方法

针对无源时差定位系统中存在系统误差和偶然误差而产生的定位模糊和无解的问题,在研究以伪逆法作为求解方法的四站定位基础上,依据不同布站形式其定位结果不同的事实,采用增加一个测量站的方法进行求解定位。对5个接收站接收到的目标信息时间差,采用主站循环的方式分别进行解算,对解算结果进行相关性分析、模糊值剔除,并对小于5个的正确解算值进行融合处理,最终得到目标的位置信息。通过对真实数据加上随机误差进行仿真试验验证,结果表明,该方法能够解决四站无解及定位模糊问题,同时提高了对目标辐射源的定位精度,并十分适用于工程实现。

Soluting to Non-solution and Ambiguous Location of Four Stations by Increasing Station

According to the problem of ambiguous location and non-solution caused by system error and accidental error in the passive TDOA position system, a method of adding a receiving station has been adopted to locate target based on the study to the fourstation location system which the pseudo-inverse method is adopted as the solving method and the fact that different station distribution have different results. Five stations are chosen and grouped by the main station cycle to get the measurement set of results with the target TOA of the five receiving stations. Correlation analysis and ambiguity value rejection to the measurement has been done. The final target location information has got by fusion process with less than five correct values. It is verified by simulation experiment which shows that the method can solve the problem of non-solution and ambiguous location with four stations and improve the positioning accuracy and is very suited for engineering on real data with random error.