DocumentCode :
1221168
Title :
Influence of nonlinearity on partial-response signalling systems
Author :
Kavehrad, Mohsen
Author_Institution :
GTE Satellite Corporation, Stamford, USA
Volume :
3
Issue :
2
fYear :
1979
fDate :
3/1/1979 12:00:00 AM
Firstpage :
69
Lastpage :
75
Abstract :
The behaviour of data-transmission systems, in particular p.a.m. systems, using partial-response signalling techniques in the presence of Gaussian and impulsive noise is investigated. Such an investigation permits a meaningful study of practical systems, because even if nonlinearity has not been added to the system, all real systems have a finite dynamic range of linear operation and act as a soft limiter with a highsaturation level. A 3rd-order polynomial device expressed by Y = a1x + a2x3 with an optimum nonlinearity resemblance is employed to suppress the large excursions of the impulsive noise. The effects of the nonlinearity on the partial-response signalling-systems behaviour is searched. An equaliser-design approach in the frequency domain is presented that includes the constraints of elimination of performance degradation owing to the nonlinearity and minimisation of the receiver-output noise power. Several partial-response signalling systems which are of practical interest are considered, and for each system the receiving-filter (equaliser) characteristics are obtained. Finally, the behaviour of standard p.a.m. systems and partial-response signalling systems in the presence of nonlinearity are compared.
Keywords :
data communication systems; interference (signal); pulse amplitude modulation; signalling; PAM systems; data transmission systems; nonlinearity; partial response signalling;
fLanguage :
English
Journal_Title :
Electronic Circuits and Systems, IEE Journal on
Publisher :
iet
ISSN :
0308-6984
Type :
jour
DOI :
10.1049/ij-ecs.1979.0012
Filename :
4808542
Link To Document :
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