Method of tracking radio frequency signals

Details Method of tracking radio frequency signals Method of tracking radio frequency signals

2005-03-02

2010-02-16

Tarcza, Thomas H (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

C701S213000

Reexamination Certificate

active

07663541

ABSTRACT:
Embodiments of the invention are directed to 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 carried on fast moving vehicles and comprising receiving means can experience a shift in the frequencies received due to Doppler shift. Embodiments provide a way of taking such a Doppler shift into account by means of acceleration measurements of the electronic equipment. Some embodiments may be used in electronic equipment containing a GPS receiver or the like, where re-tracking of satellites can be power and time consuming.

REFERENCES:
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patent: 5931890 (1999-08-01), Suwa et al.
patent: 5991692 (1999-11-01), Spencer, II et al.
patent: 6397146 (2002-05-01), Bruner
patent: 6424290 (2002-07-01), O'Neil et al.
patent: 2002/0039381 (2002-04-01), Dooley et al.
patent: 2006/0095206 (2006-05-01), Garin et al.
International Preliminary Examination Report for PCT/EP2005/002266.

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