空间三站时差定位的模糊及无解问题

Ambiguity and non-solution problems of 3-D tri-station TDOA location systems

摘要:

通过分析空间三站时差定位的经典算法，对模糊及无解问题的产生进行了探讨，分析了无解的分布与布站、站址误差和时差测量误差之间的关系，提出了解决模糊及无解问题的方法。在实际应用中，应充分运用目标先验信息，合理使用消除定位模糊的方法以降低系统复杂性，提高运算效率，同时优化测量站布局，使目标区域避开无解分布区。

Abstract:

By analyzing the classical algorithm for the three-dimensional(3-D) tri-station Time Difference Of Arrival(TDOA) location, the reasons to produce ambiguity and non-solution were discussed. The correlation of the distribution of non-solution area with the placement of stations, stations site error and TDOA error was analyzed. Some methods to solve the problems of ambiguity and non-solution were presented. In the practical application, the priori information of targets should be used adequately. The methods to solve the problems of ambiguity must be used well to reduce complexity and enhance operation efficiency. Meanwhile, the distribution of stations should be optimized to make the target area to be out of the non-solution area.