Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2005-01-18
2005-01-18
Hudspeth, David (Department: 2684)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S456200, C455S456500, C455S404200, C342S387000
Reexamination Certificate
active
06845240
ABSTRACT:
A system and method for determining the geolocation of autonomous mobile appliances emitting analog waveforms is disclosed. More specifically, the inventive system and method is used to geolocate FM analog signals such as those used in the AMPS cellular radio air standard by using a time difference of arrival (“TDOA”) approach. The inventive system and method uses a novel approach to minimize the amount of data sent between location sensors and the central location processor comprising adaptive signal combining from N channel to a single channel, FM demodulation to reduce bandwidth, Fourier transformation for signal compression, and segmentation of the location sensors into primary and secondary modes to allow for parallel processing to ease the computational burden on the central location processor.
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Carlson John Peter
Gravely Thomas Booker
Kennedy, Jr. Joseph P.
Afshar Kamran
Duane Morris LLP
Grayson Wireless
Hudspeth David
LandOfFree
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