基于先验信息的双站时差定位算法研究与精度分析

Two-station TDOA Location Algorithm and Accuracy Analysis Based on Prior Information

针对双被动观测站无法实现时差定位的问题,提出了基于先验信息的双站时差定位方法。介绍了该算法的定位原理和定位流程,并进行了仿真分析,通过将其定位精度的几何分布仿真结果和实际的蒙特卡洛仿真结果进行比较,可得,在相同目标的条件下,两种方法的仿真结果基本一致,验证了该算法的可行性和定位性能。该算法相对于传统的三站时差定位和双站测角交叉定位降低了系统设备复杂度,增强了时差定位的应用前景。

A 2-station TDOA location method based on prior information is proposed. With the proposed method, some TDOA location problems which are unable to be solved in 2-station situation can be solved well. The mechanism of location algorithm and flow are introduced, and simulation is provided. The com- parison between the geometric distribution of its location accuracy and Monte-Carlo simulation, and the dates show the two methods are consistent for the same objective condition in effect. The feasibility and the performance of the algorithm were verified. Compared with the traditional 3-station TDOA location and the direction finding cross localization, the method reduces the complexity of the device, enhancing the application prospects of TDOA location.