H - Electricity – 04 – J
Patent
H - Electricity
04
J
363/24, 325/28,
H04J 3/02 (2006.01) H04L 27/20 (2006.01)
Patent
CA 1200936
A COMMUNICATION SYSTEM HAVING IMPROVED DIFFERENTIAL PHASE SHIFT KEYING MODULATION ABSTRACT A communication system which generates an output signal of a selected primary frequency having digital data bits serially modulated thereon by utilizing a hybrid differential phase shift keyed (DPSK) modulation is provided. The improved DPSK modulation is frequency modulation of a phase encoded signal. A controller controls frequency generator means which frequency shift the output signal between primary and secondary frequencies. The controller and frequency generator means provide a modulated output signal which is D.C. balanced bit by bit and has substantially reduced harmonic energy.
426622
Dellande Brian W.
Wurzburg Henry
Gowling Lafleur Henderson Llp
Motorola Inc.
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