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
Link To Document :
