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The Analytic Signal Representation of Modulated Waveforms

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1 Author(s)
Bedrosian, E. ; Electronics Department, RAND Corporation, Santa Monica, Calif.

This report offers a rather general and mathematically convenient formulation of analog-modulated signals which makes use of the analytic signal concept. Known types of modulation are readily identified as special cases. As a result of examining the various cases which the model embraces, a new type of modulation has been discovered-single sideband frequency modulation (SSB FM)¿which can be derived from a conventional phase-modulated signal by an additional amplitude modulation, using the exponential function of the modulating signal's Hilbert transform. The resulting modulated signal will have a one-sided spectrum about the carrier frequency, will be compatible with existing FM receivers, and will cause a decrease in signal bandwidth.

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Proceedings of the IRE  (Volume:50 ,  Issue: 10 )