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