Urban terrain geolocation system
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United States of America Patent
Stats
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Jul 13, 2004
Grant Date -
Apr 15, 2004
app pub date -
Oct 12, 2002
filing date -
Oct 12, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A system for tracking a moveable object such as a soldier in an urban environment includes a receiver that is positioned on the movable object and a plurality of signal transmitters. The transmitters are mutually dispersed at known locations within the urban environment and each transmitter is configured to generate a low frequency electromagnetic signal capable of penetrating into buildings in the urban environment. At the receiver, phase related information and the receiver location information are extracted from received signals and used to determine the location of the receiver. Phase related ambiguities can be eliminated by a processor to find the real receiver position using an algorithm such as the maximum likelihood method (MLM) algorithm. Once the real receiver position is calculated, it can be transmitted to a central location using a low probability of intercept (LPI) waveform to prevent hostile parties from intercepting the location of the soldier.
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Cited Art Landscape
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