POSITION DETERMINATION FOR A MOBILE DEVICE

摘要

The present invention provides for a method of determining a current position of a mobile signal receiver arranged to receive positioning signals from remote transmitters and comprising the steps of identifying a first position on the basis of positional data from the said positional signals, identifying a second position on the basis of a previously reported position and velocity data for the receiver obtained from signals from the remote transmitters, comparing the said first and second positions and identifying only the second position as the required current position responsive to a determined difference between the first and second positions.