井下频域超分辨率TOA定位算法

Frequency-domain Super-resolution TOA Position Algorithm of Underground

文章在分析3种无线定位方法的基础上,指出TOA定位方法提供的定位精度较高,在井下使用具有一定的可行性,并针对TOA定位方法的时间分辨率有限、不能满足井下应用要求的问题,提出了一种基于子空间分解和MUSIC算法的频域超分辨率TOA定位算法,最后采用该算法分别对收发天线间有、无障碍物阻隔这2种情况进行了仿真。结果表明,频域超分辨率TOA定位算法在低信噪比的情况下也可以提高时间分辨率,达到较高的定位精度,比较适用于井下人员无线定位。

On the basis of analyzing three kinds of wireless position methods, the paper indicated the TOA position method could provide higher position precision, which had certain feasibility used in underground. And aiming at the problems that TOA position method had limited time resolution and could not meet with the demands used in underground, it proposed a frequency-domain super-resolution TOA position algorithm based on subspace decomposition and MUSIC algorithm. At last it used the algorithm to simulate the two typical conditions of OLOS and LOS between sending antenna and receiving antenna. The result showed that the frequency-domain super-resolution TOA position algorithm can improve time resolution and achieve higher position precision under the condition of low SNR, which is suitable for underground personnel position.