Journal ArticleDOI
Certain Topics in Telegraph Transmission Theory
TLDR
A considerable portion of the paper describes and illustrates a method for expressing the criteria of distortionless transmission in terms of the steady-state characteristics of the system, and of the minimum frequency range required for transmission at a given speed of signaling.Abstract:
The most obvious method for determining the distortion of telegraph signals is to calculate the transients of the telegraph system. This method has been treated by various writers, and solutions are available for telegraph lines with simple terminal conditions. It is well known that the extension of the same methods to more complicated terminal conditions, which represent the usual terminal apparatus, leads to great difficulties. The present paper attacks the same problem from the alternative standpoint of the steady-state characteristics of the system. This method has the advantage over the method of transients that the complication of the circuit which results from the use of terminal apparatus does not complicate the calculations materially. This method of treatment necessitates expressing the criteria of distortionless transmission in terms of the steady-state characteristics. Accordingly, a considerable portion of the paper describes and illustrates a method for making this translation. A discussion is given of the minimum frequency range required for transmission at a given speed of signaling. In the case of carrier telegraphy, this discussion includes a comparison of single-sideband and double-sideband transmission. A number of incidental topics is also discussed.read more
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Capacity Limits of Optical Fiber Networks
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Iterative hard thresholding for compressed sensing
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The Shannon sampling theorem—Its various extensions and applications: A tutorial review
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References
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Journal ArticleDOI
Measurement of Telegraph Transmission
TL;DR: Methods for measuring this distortion and for analyzing the results so as to indicate the nature and extent of the impairment and its probable cause are described.
Journal ArticleDOI
Submarine Cable Telegraphy
TL;DR: In this paper, the history of the development of the subject is outlined, and methods of operation of cables are described, and a general method of analysis is developed, based upon an extension of ordinary alternating-current theory.