Local area positioning system

Details Local area positioning system Local area positioning system

2006-05-23

2006-05-23

Pope, Daryl C (Department: 2632)

Communications: electrical

Condition responsive indicating system

With particular coupling link

C340S505000, C340S539100, C340S539220, C340S539230

Reexamination Certificate

active

07049957

ABSTRACT:
A positioning system includes a command signal generator, a subject module, a plurality of sensor modules, and a plurality of counters. A comparator compares the plurality of increments and generate a plurality of counter differential values; and a correlator correlates the plurality of counter differential values to determine a subject location in the defined space.A method for locating a subject includes transmitting a signal to a subject unit; transmitting a signal to slave units located within the defined three-dimensional space, such that each slave unit starts a 1 GHz counter; transmitting a subject signal from the subject unit; stopping said counters; determining net counter values; comparing the net counter values to determine counter difference values; and correlating said counter difference values to determine a subject unit location in the three-dimensional space.

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