The effect of solid state power amplifiers (SSPAs) nonlinearities on MPSK and M-QAM signal transmission

Author

Ghorbani, A. ; Sheikhan, M.

Author_Institution

Amirkabi Univ., Tehran, Iran

fYear

1991

fDate

2-6 Sep 1991

Firstpage

193

Lastpage

197

Abstract

Simple four-parameter formulas model are presented for solid state power amplifiers (SSPAs) exhibiting both amplitude nonlinearity (AM/AM) and amplitude modulation to phase modulation conversion (AM/PM). Based on these models closed form expressions of symbol error probability for M-PSK and M-QAM signals transmitted through nonlinear SSPA in the presence of white additive Gaussian noise for a terrestrial link with a coherent receiver are calculated. Also the optimum values for the decision threshold levels and phase shift are calculated in order to minimise the error probability. The effect of SSPA input back off from the saturation point on M-QAM and M-PSK system performance are studied

Keywords

amplitude modulation; microwave amplifiers; network parameters; nonlinear network analysis; phase shift keying; power amplifiers; solid-state microwave circuits; AM/AM conversion; AM/PM conversion; M-PSK; M-QAM; RF amplifiers; amplitude modulation to phase modulation conversion; amplitude nonlinearity; closed form expressions; coherent receiver; decision threshold levels; four-parameter formulas model; microwave amplifiers; phase shift; signal transmission; solid state power amplifiers; symbol error probability; system performance; terrestrial link; white additive Gaussian noise;

fLanguage

English

Publisher

iet

Conference_Titel

Digital Processing of Signals in Communications, 1991., Sixth International Conference on

Conference_Location

Loughborough

Print_ISBN

0-85296-522-2

Type

conf

Filename

151926