A novel estimator and performance bound for time propagation and Doppler based radio-location

This paper presents the theoretical accuracy limits of the geolocation algorithms based on TOA measurements exploiting the fact that the mobile is moving in a known or unknown direction. The developed expressions show us the possible improvements in terms of accuracy and/or availability due to the diversity created with the movement. A simple algorithm based on the use of TOA drift estimation is also presented in order to compare its performance with the developed theoretical limits. The proposed estimator attains the theoretical limits under certain conditions.