The transmission characteristics of asymmetric-sideband communication networks
- 1 March 1942
- journal article
- Published by Institution of Engineering and Technology (IET) in Journal of the Institution of Electrical Engineers - Part III: Communication Engineering, including the Proceedings of the Wireless Section of the Institution
- Vol. 89 (5) , 19-39
- https://doi.org/10.1049/ji-3-1.1942.0003
Abstract
This paper deals with an investigation into some theoretical and practical aspects of the partial suppression of one or both sidebands of a modulated carrier wave. The work is primarily of interest in connection with asymmetric-sideband television broadcasting channels.The envelope distortion and carrier phase modulation produced by a channel of asymmetric characteristics are derived, and experiments are described which demonstrate some of the effects in such channels. A method is described of obtaining the “equivalent modulation characteristics” of an asymmetric-sideband channel, which is exact for all types of modulation envelope at any modulation depths. In the analysis quite general channel characteristics are assumed, and not “idealized” forms.Keywords
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