DocumentCode
776054
Title
256-QAM Modem Performance in Distorted Channels
Author
Wu, Kuang-Tsan ; Feher, Kamilo
Author_Institution
Univ. of Ottawa, Canada
Volume
33
Issue
5
fYear
1985
fDate
5/1/1985 12:00:00 AM
Firstpage
487
Lastpage
491
Abstract
Performance degradations of 256-QAM modems in distorted channels are studied in this correspondence. Illustrative linear, parabolic, and sinusoidal amplitude and group delay channel distortions, caused by filter imperfections and/or by selective radio fades, are investigated. To enable an easy comparison with 64-QAM systems, we present the degradations of these systems in the same figures as those of 256-QAM modems. It is shown that linear (slope) group delay and sinusoidal (ripple) amplitude distortions cause the most significant performance degradations.
Keywords
Quadrature amplitude modulation; Radio communication; Bandwidth; Bit rate; Computer simulation; Degradation; Delay lines; Digital communication; Fading; Filters; Hardware; Modems;
fLanguage
English
Journal_Title
Communications, IEEE Transactions on
Publisher
ieee
ISSN
0090-6778
Type
jour
DOI
10.1109/TCOM.1985.1096325
Filename
1096325
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