DocumentCode
932722
Title
N-user trellis coding for a class of multiple-access channels (Corresp.)
Author
Chevillat, P.
Volume
27
Issue
1
fYear
1981
fDate
1/1/1981 12:00:00 AM
Firstpage
114
Lastpage
120
Abstract
Trellis coding is investigated for a class of 
-user multiple-access channels. It is shown that -user trellis coding, in conjunction with Viterbi or sequential decoding, permits the multiple-access function to be combined with forward error correction. The distance and rate properties are analyzed for linear (convolutional) -user trellis codes, and the use of nonlinear -user trellis coding is discussed. A procedure is given for constructing -user convolutional-code -tuples with large free distance. Finally the error performance is analyzed, and coding gains of several decibels over uncoded time sharing are verified by simulation results.
-user multiple-access channels. It is shown that -user trellis coding, in conjunction with Viterbi or sequential decoding, permits the multiple-access function to be combined with forward error correction. The distance and rate properties are analyzed for linear (convolutional) -user trellis codes, and the use of nonlinear -user trellis coding is discussed. A procedure is given for constructing -user convolutional-code -tuples with large free distance. Finally the error performance is analyzed, and coding gains of several decibels over uncoded time sharing are verified by simulation results.Keywords
Multiple-access communications; Sequential decoding; Trellis codes; Viterbi decoding; Adders; Convolution; Convolutional codes; Decoding; Detectors; Forward error correction; Frequency shift keying; Information theory; Time sharing computer systems; Viterbi algorithm;
fLanguage
English
Journal_Title
Information Theory, IEEE Transactions on
Publisher
ieee
ISSN
0018-9448
Type
jour
DOI
10.1109/TIT.1981.1056301
Filename
1056301
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