关键词: 校正因子, 迭代算法, 最大似然方法, 非视距, 到达时间差

Abstract: The wireless environment is supposed to the LOS in the classic wireless location algorithm.Although the reflection，refraction etc. do exist in the real environment，so the tolerance of the location must be more if we use the classic algorithm.Here we put forward one algorithm to mitigate the fact of NLOS.The algorithm uses the emendation factor and iterate gradually so as to mitigate the fact of NLOS.Simulation shows that the algorithm improves the accuracy of location better than the general algorithm，and the complication is low.

Key words: emendation factor, iterative algorithm, ML, NLOS, TDOA