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From Equation 2.13, it can be seen that the peak shift in the carrier frequency (?f) is proportional to the amplitude of the binary input signal (vm[t]), and the direction In particular, we discuss amplitude and frequency modulation. We discuss the phase of the carrier, the modulation is called phase shift keying or PSK. A hybrid Mar 26, 2018 - Frequency. – FSK: Frequency Shift Keying. ? Phase. – M-PSK: Phase Shift Keying. ? Amplitude + Phase. – M-QAM: Quadrature Amplitude Modulation 19. Amplitude Shift Keying (ASK) (1). ? The modulation signal set is. ? T s is the symbol period. ? f c is the carrier frequency, is the carrier initial phase. ? g(t) is a The higher frequency reuse achievable with multibeam satellite antennas. • The increasing satellite Effective Isotropic Radiated Power (EIRP) at RF as well as. Both frequency and phase remain constant while the amplitude changes. In ASK, the amplitude of the carrier assumes one of the two amplitudes dependent on the The three techniques, referred to as amplitude shift keying (ASK), frequency shift keying (FSK) and phase shift keying (PSK), are discussed in the followingMar 5, 2019 - Mar 26, 2019 -