DocumentCode
1068621
Title
Notes on the Theory of Modulation
Author
Carson, John R.
Author_Institution
Department of Development and Research, American Telephone and Telegraph Company, New York
Volume
10
Issue
1
fYear
1922
Firstpage
57
Lastpage
64
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
Amplitude modulation; Demodulation; Frequency; RF signals; Telegraphy; Telephony; Tuning; Wire;
fLanguage
English
Journal_Title
Radio Engineers, Proceedings of the Institute of
Publisher
ieee
ISSN
0731-5996
Type
jour
DOI
10.1109/JRPROC.1922.219793
Filename
1666700
Link To Document