IS7122A

Supressed cycle based carrier modulation using amplitude modulation

Abstract

A sinusoidal RF carrier is modulated for the transmission of digital binary data streams through the amplitude supression of carrier wavelets, which are defined between zero crossover positions representing zero energy locations. This modulation is accomplished when the carrier is slightly amplitude modulated with a modulation signal that is equal in frequency to the carrier itself and the modulation always begins or ends upon the exact zero voltage crossing point of the RF cycle phase. The modulation is applied as a slight shift of the amplitude of any single cycle, each cycle representing a single bit of data. A single cycle of RF will either represent a "1" or "0" depending upon the amplitude of the cycle, relative to other adjacent cycles in the same carrier.

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Term ended

Projected expiry passed 22 January 2024, 2.7 years ago.

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DocumentOfficeKindDate
91605401United States of AmericaA
0131105United States of AmericaW
PCTUS0131105
US20010916054
WO2001US31105

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US2002058484A1United States of AmericaA1
CA2455737A1CanadaA1
WO03013089A2World Intellectual Property Organization (WIPO)A2
WO03013089A3World Intellectual Property Organization (WIPO)A3
IS7122AThis recordIcelandA
EP1410591A2European Patent Office (EPO)A2
US6901246B2United States of AmericaB2
AU2002211428B2AustraliaB2
CA2455737CCanadaC