PHYSICAL LAYER AND TRANSMISSION MEDIA
DIGITAL TRANSMISSION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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In phase shift keying, the ____ of the carrier is varied to represent two or more different signal elements.
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Amplitude
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Frequency
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Phase
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All of the above
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Explanation:
Detailed explanation-1: -Phase Shift Keying (PSK) In phase shift keying, the phase of the carrier is varied to represent two or more different signal elements. Both peak amplitude and frequency remain constant as the phase changes. Today, PSK is more common than ASK or FSK.
Detailed explanation-2: -Frequency modulation (FM) In frequency modulation, the frequency rather than the amplitude of the carrier wave is made to vary in proportion to the varying amplitude of the modulating signal, as shown in Fig. 9.19d.
Detailed explanation-3: -Phase-shift keying (PSK) is a digital modulation process which conveys data by changing (modulating) the phase of a constant frequency reference signal (the carrier wave).
There is 1 question to complete.