关键词: 时差定位l, 最大似然, 校正

Abstract: This paper proposes a new effective TDOA location algorithm to overcome the disadvantage of the traditional closed-form localization algorithms. The algorithm proposed in this paper firstly obtains the location of the source using unconstrained weighted linear least-squares, and then calibrates the estimator according to the maximum likelihood equation to acquire the final solution for the position coordinates. Computer simulation results show that the mean square position error of new algorithm is smaller than the classic Chan algorithm as the noise variance is high.

Key words: TDOA location, maximum likelihood, calibration