NASA NTRS · 19730000094
Carrier extraction circuit
Abstract
Feedback loop extracts demodulated reference signals from IF input and feeds signal back to demodulator. Since reference signal is extracted directly from carrier, no separate reference need be transmitted. Circuit obtains coherent carrier from balanced or unbalanced four-phase signal of varying characteristics.
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Solomon, K., Allen, J. R., Jackson, A., Allen, R. W.. 1973-03-01. Carrier extraction circuit. https://ntrs.nasa.gov/citations/19730000094
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