A Hybrid SS-ToA Wireless NLoS Geolocation Based on Path Attenuation: Cramer-Rao Bound
Non-line-of-sight propagation in wireless localization systems leads to a challenging problem for the estimation of a mobile position. A hybrid idea has been considered as a promising approach to increase estimation accuracy. Existing methods, however, are formulated using separate measurements, necessitating different observation quantities, e.g., received signal and received signal strength, thus making the parameter estimation cumbersome. In this paper, the authors propose a new hybrid wireless geo-location model requiring only one observation quantity, namely the received signal. The attenuation model for transmit power from base stations is explored herein to capture propagation features in the received signal model.