Location system

Communications: directive radio wave systems and devices (e.g. – Directive – Position indicating

Reexamination Certificate

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Details

C342S457000

Reexamination Certificate

active

07053831

ABSTRACT:
Systems and methods for allowing the location of transmitter to be determined (approximated) without requiring its distance from a receiver to be precisely known. Methods for determining a location of a transmitter without precise distance calculations. In one embodiment, a method is disclosed having the steps of: for a receiver, estimate a first zone a first transmitter is in; for remaining receivers that can receive a given transmitter, each estimate a second zone a first transmitter is in; and determine if there are overlaps in any of the zones. In another embodiment a potential target area is defined wherein the location of a transmitter can estimated.

REFERENCES:
patent: 5045860 (1991-09-01), Hodson
patent: 5600706 (1997-02-01), Dunn et al.
patent: 5873040 (1999-02-01), Dunn et al.
patent: 5903842 (1999-05-01), Wang et al.
patent: 5917553 (1999-06-01), Honey et al.
patent: 2003/0190917 (2003-10-01), De Cambray

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