Title :
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
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;
Conference_Titel :
Digital Processing of Signals in Communications, 1991., Sixth International Conference on
Conference_Location :
Loughborough
Print_ISBN :
0-85296-522-2
