ACCURACY OF DETERMINATION OF DEMODULATOR PARAMETERS IN SYSTEMS WITH QUADRATURE GAIN-PHASE MODULATION
St. Petersburg State University of Cinema and Television, Department of Technical Electronics; Post-Graduate Student
A. V. Krivosheikin
Saint Petersburg State University of Film and Television, Saint Petersburg, 191119, Russian Federation; Professor
Abstract. A method is proposed for determination of tolerance on demodulator parameters in digital communication systems with quadrature gain-phase modulation (e.g., in cable digital TV). An expression is derived connecting demodulator parameter deviation with error probability.
Keywords: error probability deviation, quadrature gain-phase modulation, tolerance on parameters, signals spacing, field of signals, quadrature channel, threshold level, sensitivity.