The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 08, 2003
Filed:
Feb. 22, 2001
Andrew T. Yule, East Grinstead, GB;
Stephen Townsend, Horley, GB;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
GPS receiver ( ) is disclosed together a mobile unit especially in the form of a mobile cellular telephone ( ) incorporating the same. The GPS receiver ( ) comprises a GPS signal antenna ( ) for receiving externally transmitted GPS signals; an analogue-to-digital converter ( ) coupled to the antenna for sampling the received GPS signals; a memory ( ) for storing the GPS signal samples; and a digital GPS signal processor ( ) for retrieving pseudorange information from the GPS signal samples stored in the memory ( ). The receiver ( ) has a dormant mode of operation in which received GPS signals are sampled and stored in the memory ( ) but the signal processor ( ) is not operative for retrieving pseudorange information, and an active mode of operation in which the signal processor ( ) is operative for retrieving pseudorange information. Also, the receiver ( ) is arranged to change from the dormant mode to the active mode in response to a instruction received from external to the receiver ( ) and made whilst the receiver ( ) is operating in the dormant mode.