System and method for analog cellular radio geolocation
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United States of America Patent
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Jan 18, 2005
Grant Date -
Sep 12, 2002
app pub date -
Dec 11, 2001
filing date -
Dec 11, 2000
priority date (Note) -
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status (Latency Note)
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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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