The minimum error algorithm based on TOA measurement for achieving approximate optimal 3D positioning accuracy

According to the TOA (Time of Arrival) based ranging model and the TOA based terminal location model proposed in this paper, the relationship between the number of different base stations and the positioning accuracy can be obtained. Given a minimum number of base stations, a minimum error algorithm based on TOA measurement is proposed, which realizes the approximate optimal three-dimensional positioning accuracy. In order to verify the validity of the algorithm, this paper first defines the positioning accuracy as the error between the real coordinates of the terminal and the calculated coordinates. The smaller the error is, the higher the positioning accuracy is. On the contrary, the positioning accuracy is lower. Finally, this paper uses the data from a given test sample, the terminal coordinate information is solved according to the proposed algorithm, and the result of the solution is compared with the real coordinate information of the terminal, which proves the superiority of the algorithm.