Title :
A semi-analytical method for evaluating the performance of digital modulations transmitted through nonlinear channels
Author :
Gemikonakli, D. ; Aghvami, A.H.
Author_Institution :
Dept. of Electron. & Electr. Eng., King´´s Coll., London, UK
Abstract :
A time-efficient, flexible semianalytical method for evaluating the symbol error probability (SEP) of digital modulations is presented. To show the validity and usefulness of the method, SEPs of 8-ary PSK (phase shift keying) and 16-ary QAM (quadrature amplitude modulation) transmissions, are evaluated considering the effects of AM/AM and AM/PM conversions of a TWTA (traveling wave tube amplifier). The effect of an RF linearizer has also been studied. It is shown that, using the proposed method, SEPs as small as 10-9 can be calculated. Transmission of 20 K and 32 K symbols is sufficient to compute SEPs of 10-5 and 10-9, respectively
Keywords :
amplifiers; amplitude modulation; error statistics; phase shift keying; satellite relay systems; telecommunication channels; travelling-wave-tubes; 16-ary QAM; 8-ary PSK; RF linearizer; digital modulations; nonlinear channels; phase shift keying; quadrature amplitude modulation; satellite relay systems; symbol error probability; time-efficient flexible semianalytical method; traveling wave tube amplifier; Analytical models; Digital modulation; Filters; Gaussian noise; Interference; Performance analysis; Phase shift keying; Quadrature amplitude modulation; Radio frequency; Transmitters;
Conference_Titel :
Global Telecommunications Conference and Exhibition 'Communications Technology for the 1990s and Beyond' (GLOBECOM), 1989. IEEE
Conference_Location :
Dallas, TX
DOI :
10.1109/GLOCOM.1989.64240
