DocumentCode :
935865
Title :
Further analysis of bandlimited 16-ary QAM signalling in satellite channels
Author :
Aghvami, A.H.
Author_Institution :
King´s College London, Department of Electronic & Electrical Engineering, London, UK
Volume :
133
Issue :
3
fYear :
1986
fDate :
6/1/1986 12:00:00 AM
Firstpage :
232
Lastpage :
235
Abstract :
The paper presents a method of analysing the performance of a bandlimited 16-ary quadrature amplitude modulation(QAM) signal transmitted through a bandpass nonlinearity (BPNL), exhibiting AM-AM and AM-PM conversions, and in the presence of additive Gaussian noise (AGN) both preceding and following the BPNL. To illustrate the validity and usefulness of the technique, the symbol probability of a bandlimited 16-ary QAM signal transmitted through a typical nonlinear satellite channel is derived and computed for a four-pole Bitterworth filter as a function of various levels of the on-board travelling-wave tube (TWT) back-off from saturation and BT products. Finally, as an example, a study of the effect of increased bandlimiting on the system degradation for this communications system model is undertaken.
Keywords :
amplitude modulation; satellite links; signalling (telecommunication networks); Butterworth filter; additive Gaussian noise; bandlimited 16-ary QAM signalling; bandpass nonlinearity; quadrature amplitude modulation; satellite channels; travelling-wave tube;
fLanguage :
English
Journal_Title :
Communications, Radar and Signal Processing, IEE Proceedings F
Publisher :
iet
ISSN :
0143-7070
Type :
jour
DOI :
10.1049/ip-f-1.1986.0040
Filename :
4646864
Link To Document :
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