Notes on the Theory of Modulation
Open Access
- 1 February 1922
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in Proceedings of the IRE
- Vol. 10 (1), 57-64
- https://doi.org/10.1109/jrproc.1922.219793
Abstract
The transmission system of "frequency modulation" (transmission by variation of the frequency of the radiated wave) is mathematically analyzed, and the width of the band of frequencies occupied by this method of transmission at a given speed is compared with the width of the corresponding band for transmission by amplitude variation. It is proved that the frequency modulation system using a spacing or compensating wave is inferior to the amplitude variation system both as to the width of the frequency band occupied and as to distortion of signal wave form.Keywords
This publication has 1 reference indexed in Scilit:
- Carrier Current Telephony and TelegraphyTransactions of the American Institute of Electrical Engineers, 1921