H - Electricity – 04 – L
Patent
H - Electricity
04
L
328/35
H04L 27/04 (2006.01) H04L 25/03 (2006.01) H04L 27/36 (2006.01)
Patent
CA 1267195
TECHNIQUE FOR SYNTHESIZING THE MODULATION OF A TIME VARYING WAVEFORM WITH A DATA SIGNAL Abstract A technique for digitally synthesizing the amplitude modulation of one or more carrier signals with a random digital data signal is disclosed. Pursuant to the present invention, a memory unit is addressed by a plurality of binary coded digital symbols in the data signal. For each address, at least two digital representations are read out. Each representation corresponds to a different sample of the carrier signals which has been amplitude modulated by a composite of the spectrally shaped data signal. The disclosed technique can be adapted to synthesize a variety of modulation formats, and can provide compensation for fixed in-rail and cross-rail distortions.
542612
Debus Walter Jr.
Reeve Howard Clifford III
Siller Curtis A. Jr.
American Telephone And Telegraph Company
Kirby Eades Gale Baker
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