DocumentCode
921931
Title
Digital transmission with coherent four-dimensional modulation
Author
Welt, George R. ; Lee, Jhong S.
Volume
20
Issue
4
fYear
1974
fDate
7/1/1974 12:00:00 AM
Firstpage
497
Lastpage
502
Abstract
This paper examines codes for four-dimensional (4-D) modulation and their performance for digital transmission. The signals are defined by 
points inside a sphere in four-dimensional Euclidian space. Three classes of 4-D codes are presented, and an algorithm is given which yields good 4-D codes of any length. Bounds on symbol error probability are plotted versus symbol-energy-to-noise-density ratio. The performance is shown to exceed that of amplitude- and-phase modulation in two independent two-dimensional channels.
points inside a sphere in four-dimensional Euclidian space. Three classes of 4-D codes are presented, and an algorithm is given which yields good 4-D codes of any length. Bounds on symbol error probability are plotted versus symbol-energy-to-noise-density ratio. The performance is shown to exceed that of amplitude- and-phase modulation in two independent two-dimensional channels.Keywords
Coding; Digital modulation/demodulation; Decision feedback equalizers; Digital modulation; Dispersion; Error probability; Filters; Intersymbol interference; Kilns; Laboratories; Modulation coding; Stochastic processes;
fLanguage
English
Journal_Title
Information Theory, IEEE Transactions on
Publisher
ieee
ISSN
0018-9448
Type
jour
DOI
10.1109/TIT.1974.1055247
Filename
1055247
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