A TOA based believable factor mobile location algorithm

A key obstacle to high accuracy mobile location is the none line of sight (NLOS) transmission of signal. This paper presents a new algorithm named believable factor algorithm (BFA) to gain favorable position accuracy, using the geometrical feature of cell layout, the path loss model and received signal strength, based on the time of arrival (TOA) range measurements. Different distributed NLOS error is utilized to research the performance of this approach. Results show that the BFA can efficiently reduce the affect of the NLOS error, and is robust to different distributed NLOS error. The location accuracy satisfies the demand of E911 and has been greatly improved over other algorithms.