A process and machine for estimating the location of a wireless terminal is disclosed. The illustrative embodiment of the present invention is based on the observation that the signal strength of a signal from a transmitter is different at some locations, and, therefore, the location of a wireless terminal...http://www.google.de/patents/US8068802?utm_source=gb-gplus-sharePatent US8068802 - Estimating the location of a wireless terminal based on calibrated signal-strength measurements
