Abstract:

A target tracking method based on the time of arrival (TOA) measurement is proposed. This method not only overcomes the disadvantage of special sitesdeploying requirement in the location algorithm based on single-time TOA measurement but also greatly improves the location precision. Based on the TOA measurements of multi-stations, an extended Kalman filter (EKF) is used to track targets. To quicken the EKF converging speed, the Levenberg-Marquardt algorithm is utilized to give a more accurate initial value. Then a method to judge targets’ manoeuvre and a simplified tracking scheme are offered. Considering the nonideal property of the outfield condition, a system with only two emitters and one receiver is introduced and a method to eliminate the fuzzy track is presented. Simulation and real data processing results prove that the proposed method has the advantages of fast converging speed, stable performance and high precision.