Fine Time Aiding and Pseudo-Synchronisation of GSM Networks
T. Pratt, Ramsey M. Faragher, Peter J. Duffett-Smith · 2006
The integration of CDMA and GPS within a single mobile terminal, in support of the FCC E911 initiative, has greatly benefited from the GPS-based synchronisation of the CDMA network. Similar synchronisation is not available in GSM and W-CDMA networks which are, by design, asynchronous in operation, and this makes GPS integration into GSM and W-CDMA mobile terminals more complex and costly. Duffett-Smith & Tarlow [1] have described a new technology for pseudosynchronising a GSM system which can provide a time reference to an embedded GPS receiver with an accuracy