NASA NTRS · 19730000273
Two-carrier command modulation system
Abstract
Two carriers transmit two high-power signals from single transmitter, each phase-modulated by subcarrier which, in turn, is modulated by data bits; switching between two carriers is alternated at high rate. Resulting composite signal is multiplied up to desired frequency and used to drive power amplifier which feeds transmitting antenna.
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Easterling, M. F.. 1973-06-01. Two-carrier command modulation system. https://ntrs.nasa.gov/citations/19730000273
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