NOISE-IMMUNE RECEIVING OF PHASE-AMPLITUDE MODULATED SIGNALS WITH IMPERFECT QUADRATURE CHANNELS
Saint Petersburg State University of Film and Television, Saint Petersburg, 191119, Russian Federation; Professor
A. Y. Yanushkovsky
St. Petersburg State University of Cinema and Television, Department of Technical Electronics; Post-Graduate Student
Abstract. A method is proposed to determine a tolerance on demodulator parameters in digital communication systems with quadrature amplitude-phase modulation. An expression is presented which relates the phase shift angle of carrier oscillations in quadrature channels of the demodulator with the error probability.
Keywords: nominal value, error probability deviation, quadrature amplitude-phase modulation, signal field, quadrature channels, threshold level.