A position self-calibration method in multilateration

Abstract

This paper presents a self-calibration method for estimating receiver position errors using TDOA measurements for targets with unknown positions. The method uses two LS minimization steps to estimate the related receiver position errors. The method estimates the initial TDOA LS for the unknown target position with the measured receiver positions. A second weighted LS using the total differential of the TDOA equations estimates the related receiver position error. Therefore, the estimated receiver position error can be used to modify the measurement of the receiver positions. Computer simulations demonstrate the statistical performance of this method, and the results of Table IV show that the related receiver position errors estimated meet the multilateration (MLAT) requirements.