In ________, the phase of the carrier is varied to represent two or more different signal elements. Both peak amplitude and frequency remain constant.Select one:PSKQAMASKFSK
Question
In ________, the phase of the carrier is varied to represent two or more different signal elements. Both peak amplitude and frequency remain constant.Select one:PSKQAMASKFSK
Solution
To answer the question, we need to understand the different modulation techniques mentioned and determine which one fits the given description.
The modulation techniques mentioned are PSK, QAM, ASK, and FSK.
PSK stands for Phase Shift Keying, where the phase of the carrier signal is varied to represent different signal elements. However, in PSK, the amplitude and frequency of the carrier signal remain constant.
QAM stands for Quadrature Amplitude Modulation, where both the amplitude and phase of the carrier signal are varied to represent different signal elements. However, in QAM, the frequency of the carrier signal remains constant.
ASK stands for Amplitude Shift Keying, where the amplitude of the carrier signal is varied to represent different signal elements. However, in ASK, the phase and frequency of the carrier signal remain constant.
FSK stands for Frequency Shift Keying, where the frequency of the carrier signal is varied to represent different signal elements. However, in FSK, the amplitude and phase of the carrier signal remain constant.
Based on the given description, the modulation technique that fits the criteria is PSK, as it involves varying the phase of the carrier signal while keeping the amplitude and frequency constant.
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