Tri-state integer cycle modulation

Details Tri-state integer cycle modulation Tri-state integer cycle modulation

2006-02-21

2006-02-21

Bocure, Tesfaldet (Department: 2631)

Pulse or digital communications

Systems using alternating or pulsating current

Angle modulation

C375S295000, C375S335000

Reexamination Certificate

active

07003047

ABSTRACT:
The invention disclosed in this application uses a method of modulation named Tri-State Integer Cycle Modulation (TICM) wherein a carrier signal, comprised of a continuum of sine waves is modulated such that spectrum utilization is minimal. A modulation event is imposed upon the carrier signal by modifying the carrier frequency at precisely the zero crossing point or the zero degree angle. The method of imposing the modulation event is by increasing the frequency of the carrier for one or an integer number of wavelets then lowering the frequency of the carrier for one or the same integer number of wavelets then returning to the carrier frequency to derive the modulation event. The main carrier frequency is only modulated beginning at the zero degree phase angle and ending at the 360-degree phase angle.

REFERENCES:
patent: 3766477 (1973-10-01), Cook
patent: 3845391 (1974-10-01), Crosby
patent: 4425666 (1984-01-01), Groth, Jr.
patent: 5642380 (1997-06-01), Lambert
patent: 5684837 (1997-11-01), Chen
patent: 5789991 (1998-08-01), Ishii

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