基于信息分组的TDOA安全定位算法

TDOA secure localization algorithm basing on grouping information

将信息分组的方法应用于定位过程中,以方差的无偏估计是否符合误差假设作为定位参照集选取依据,提出一种能抵抗轻量级攻击的AR-TDOA定位算法。将该算法与基于TDOA测距的定位算法和SeRLoc安全定位算法在定位误差、计算开销与稳定性方面进行比较。结果表明,相同攻击强度下三者定位误差大小顺序依次为TDOA>SeRLoc>AR-TDOA。虚假锚节点数量越大,基于TDOA测距和SeRLoc的定位误差也越大,而基于AR-TDOA算法的定位误差则能保持在较小程度内。因此在增加少量计算复杂度的情况下,AR-TDOA算法能够改善定位的稳定性。

The attack resistant-time difference of arrival（AR-TDOA） was put forward by using grouping information method in the positioning process,with the selection standard of positioning reference that the unbiased estimation variance according to the error assumption.By comparing the TDOA localization algorithm with the SeRLoc safety localization algorithm on positioning error,computing cost and stability,the results show that the sequence of their positioning error is TDOASeRLocAR-TDOA under the same attack strength.The greater the number of anchor node is,the larger positioning errors of both TDOA localization algorithm and SeRLoc safety localization algorithm are,while the AR-TDOA algorithm could keep the positioning error within a smaller range.Accordingly the AR-TDOA algorithm can improve the stability of positioning with a little increase in computing complexity.