基于DOA和TDOA的井下定位算法研究

摘要

In view of problems that current underground positioning system is sensitive to environmental change and has low positioning accuracy,the paper introduced an underground positioning algorithm based on DOA and TDOA.The algorithm takes advantages of high accuracy of TDOA and high angular resolution of DOA,uses weighted average of respective direction angle of DOA and TDOA as signal angle,and combined with radius got by TDOA algorithm to calculate coordinates of mobile terminal.The simulation results show that the algorithm can achieve stable performance and high positioning accuracy in complex environment.%针对目前井下定位系统对环境变化敏感、定位准确度较低的问题,介绍了基于DOA和TDOA的井下定位算法.该算法利用TDOA算法的高精度化和DOA算法的高信号角度分辨率,以DOA和TDOA算法中各自方向角度的加权平均作为信号角度,结合用TDOA算法得到的位置半径计算出移动终端坐标.仿真结果表明,该算法在复杂的环境中能够取得较稳定的性能,且定位精度较高.