Method and apparatus of determining location of an unauthorized

Details Method and apparatus of determining location of an unauthorized Method and apparatus of determining location of an unauthorized

1994-04-05

1996-01-09

Blum, Theodore M.

Communications: directive radio wave systems and devices (e.g.,

Directive

Position indicating

342457, G01S 302

Patent

active

054832446

ABSTRACT:
Location of an unauthorized communication unit 102 may be detected in a wireless communication system 100 by determining that an identification code being used by the communication unit has been validated in an unauthorized manner. Having determined this, the site from which the communication unit is transmitting is determined. With the transmitting site determined, RF receivers 110, 111 in the proximity of the transmitting site are enabled to receive a subsequent RF transmission from the communication unit. The RF transmissions received by the RF receivers are then used to calculate the location of the communication unit.

REFERENCES:
patent: 4494119 (1985-01-01), Wimbush
patent: 5003317 (1991-03-01), Gray et al.
patent: 5144315 (1992-09-01), Schwab et al.

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