DocumentCode
1235257
Title
A Baseband Hybrid Digital Transmission Scheme
Author
Takasaki, Yoshitaka ; Aoki, Kohji
Author_Institution
Hitachi, Ltd., Tokyo, Japan
Volume
21
Issue
4
fYear
1973
fDate
4/1/1973 12:00:00 AM
Firstpage
338
Lastpage
340
Abstract
A baseband hybrid digital transmission scheme is studied, and it is shown that the low- and high-frequency cutoffs in analog repeaters extremely degrade signal waveforms. Solutions studied are a combination of dc-constrained coding and modification of amplitude-frequency characteristics for low-frequency distortion, and a combination of flat amplitude equalization and simple phase equalization for high-frequency distortion. It is shown that these solutions reduce waveform distortions by a factor of ten. A solution of the control problem for automatic gain control (AGC) is also presented.
Keywords
Data transmission systems; Repeaters; Wire communication systems; Baseband; Computer simulation; Cutoff frequency; Degradation; Filters; Passband; Phase distortion; Pulse transformers; Random variables; Repeaters;
fLanguage
English
Journal_Title
Communications, IEEE Transactions on
Publisher
ieee
ISSN
0090-6778
Type
jour
DOI
10.1109/TCOM.1973.1091656
Filename
1091656
Link To Document