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US 2002/0001339 A1Published application
Method of despreading GPS spread spectrum signals
AssigneeKoninklijke Philips Electronics N.V.
InventorsSaul R. Dooley, Andrew T. Yule
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AssigneeKoninklijke Philips Electronics N.V.
InventorsSaul R. Dooley, Andrew T. Yule
Estimating the term…
A method of despreading a GPS spread spectrum signal received at a mobile unit MS1 with assistance from a base station BS1 is disclosed comprising the steps of (a) receiving and despreading GPS signals at the base station and deriving GPS signal information therefrom; (b) estimating the location of the mobile unit; (c) modifying the GPS signal information so as reflect the GPS signal characteristics as would be observed at the estimated location of the mobile unit; (d) transmitting the GPS signal information from the base station to the mobile unit; (e) generating replica signals containing PRN codes corresponding to those of the GPS signal using the modified GPS signal information; and (f) performing a correlation of the GPS signal and the replica signals in order to acquire the GPS signal.
A method of despreading a GPS spread spectrum signal received at a mobile unit with assistance from a base station comprising the steps of:
A method according to any of the preceding claims wherein the GPS signal information comprises Doppler information.
A method according to any of the preceding claims wherein the GPS signal information comprises code phase information.
A method of providing base station assistance to a mobile unit for despreading GPS spread spectrum signals received at the mobile unit substantially as hereinbefore described with reference to the accompanying drawings.
The combination of a base station and a mobile unit for despreading a GPS spread spectrum signal received at a mobile unit with assistance from a base station by a method according to any preceding claims.
The combination of a base station and a mobile unit for despreading a GPS spread spectrum signal received at a mobile unit with assistance from a base station;
The combination of a base station and a mobile unit for despreading a GPS spread spectrum signal received at a mobile unit with assistance from a base station;
The combination of a base station and a mobile unit for despreading a GPS spread spectrum signal received at a mobile unit with assistance from a base station substantially as hereinbefore described with reference to the accompanying drawings.
A base station for providing assistance to a mobile unit for despreading GPS spread spectrum signals received at the mobile unit comprising a GPS receiver for receiving and despreading GPS signals at the base station and deriving GPS signal information therefrom, a processor arranged to modify the GPS signal information so as reflect the GPS signal characteristics as would be observed at an estimated location of the mobile unit;
A base station for providing assistance to a mobile unit for despreading GPS spread spectrum signals received at the mobile unit substantially as hereinbefore described with reference to the accompanying drawings.
A mobile unit for despreading a received GPS spread spectrum signal with assistance from a base station comprising a GPS receiver for receiving the GPS signal;
A mobile unit for despreading a received GPS spread spectrum signal with assistance from a base station substantially as hereinbefore described with reference to the accompanying drawings.
Dependencies are inferred from the claim text.