Passive universal communicator

Details Passive universal communicator Passive universal communicator

H - Electricity

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379/11, 325/30

H04B 1/54 (2006.01) G01S 13/82 (2006.01) G07B 15/00 (2006.01) H04B 7/00 (2006.01) H04B 7/26 (2006.01) H04K 3/00 (2006.01)

Patent

CA 1300289

ABSTRACT Apparatus for two-way communication between a transmitter/receiver unit (called a controller), and at least one second transmitter/receiver unit (called a communicator). The controller includes means for pseudo-randomly varying the frequency or phase of a carrier signal and means for mixing the carrier signal with a second modulated carrier signal, thereby to provide security against jamming, eavesdropping, and/or range gating on said first or second electromagnetic wave signal.

581385

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