Television – Special applications – Navigation
Reexamination Certificate
2008-10-31
2011-12-20
Walsh, John B. (Department: 2451)
Television
Special applications
Navigation
C348S113000, C725S075000
Reexamination Certificate
active
08081210
ABSTRACT:
A system and method for mitigating the effects of Doppler shift, multipath and/or noise for a mobile receiver, such as on a vehicle, that is receiving broadcast television signals. The vehicle may include a map database and a GPS receiver that combine to identify the location of the vehicle on the roadway. The receiver on the vehicle includes a rotatable antenna that can be either mechanically or electronically directed towards a broadcast tower that is broadcasting the signal that the vehicle wishes to receive. Therefore, multipath effects and other noise conditions can be mitigated or eliminated by more precisely directing the antenna towards the source of a signal. Further, the receiver on the vehicle can use the forward velocity of the vehicle and the direction of the broadcasting tower to determine the movement of the vehicle relative to the tower to correct for the Doppler shift.
REFERENCES:
patent: 6297763 (2001-10-01), Thomson et al.
patent: 6522890 (2003-02-01), Drane et al.
patent: 6995686 (2006-02-01), Gosdin et al.
patent: 2006/0161344 (2006-07-01), Iwahori et al.
patent: 2008/0263601 (2008-10-01), Hebb et al.
GM Global Technology Operations LLC
Miller John A.
Miller IP Group, PLC
Walsh John B.
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