Title:
METHOD OF TRACKING RADIO FREQUENCY SIGNALS
Document Type and Number:
WIPO Patent Application WO2005085895
Kind Code:
A8
Abstract:
The invention regards a method of keeping track of and staying tuned to a transmitter even when a receiver is moving at a relatively high speed. Electronic equipment (10) carried on fast moving vehicles and comprising receiving means (20) can experience a shift in the frequencies received due to Doppler shift. The invention provides a way of taking such a Doppler shift into account by means of acceleration measurements of the electronic equipment (10). The invention is particularly advantageous in electronic equipment (10) containing a GPS receiver (20) or the like, where re-tracking of satellites can be power and time consuming. The invention moreover regards an electronic equipment (10) arranged to perform the method and a computer program product arranged to make a processor (30) execute the method.
Inventors:
KLINGHULT GUNNAR (SE)
HANSSON BJOERN (SE)
CAMP WILLIAM O (US)
HANSSON BJOERN (SE)
CAMP WILLIAM O (US)
Application Number:
PCT/EP2005/002266
Publication Date:
October 19, 2006
Filing Date:
March 02, 2005
Export Citation:
Assignee:
SONY ERICSSON MOBILE COMM AB (SE)
KLINGHULT GUNNAR (SE)
HANSSON BJOERN (SE)
CAMP WILLIAM O (US)
KLINGHULT GUNNAR (SE)
HANSSON BJOERN (SE)
CAMP WILLIAM O (US)
International Classes:
G01C21/20; G01S1/00; G01S5/02; G01S11/10; G01S19/26; G01S19/27; G01S19/29; G01S19/48; H04B1/18; G01S7/40; G01S19/23; G01S19/25; G01S19/39; G01S19/47
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