System and method for near-field electromagnetic ranging

Communications: directive radio wave systems and devices (e.g. – Determining distance – With remote cooperating station

Reexamination Certificate

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C342S118000, C342S127000

Reexamination Certificate

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06963301

ABSTRACT:
A system for measuring distance between a first locus and a second locus includes: (a) at least one beacon device; a respective beacon device of the at least one beacon device being situated at the first locus and transmitting a respective electromagnetic signal; and (b) at least one locator device; a respective locator device of the at least one locator device being situated at the second locus and receiving the respective electromagnetic signal. The respective locator device is situated at a distance from the respective beacon device within near-field range of the respective electromagnetic signal. The respective locator device distinguishes at least two characteristics of the respective electromagnetic signal. The respective locator device employs the at least two characteristics to effect the measuring.

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