G - Physics – 01 – S
Patent
G - Physics
01
S
343/69
G01S 5/06 (2006.01) G01S 5/14 (2006.01)
Patent
CA 1210118
ABSTRACT IMPROVEMENTS IN OR RELATING TO RECEIVERS FOR NAVIGATION SATELLITE SYSTEMS (See Figure 1 of the drawings) The present invention provides a receiver for a navigation satellite system such as NAVSTAR, which includes an antenna (1) for receiving an incoming coded, time-based, spread spectrum signal which includes navigational data from a plurality, P, of satellites, means (23) for deriving baseband I and Q components of each of the signals, means (10,11) for digitising the I and Q components, a Fast Fourier Transform (FFT) processor (13) for transforming the digitised I and Q components and their respective codes, and means (15a to 15d) arranged to multiply together the transformed components and codes derived for each of the P satellite signals and to inverse transform the signals and to then determine correlation peaks in the inverse transformed signals.
418551
Gowling Lafleur Henderson Llp
Qinetiq Limited
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