PHYSICAL LAYER AND TRANSMISSION MEDIA
INTRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What is the minimum sampling rate required in order to recovered the information signal?
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The sampling rate must be at least the same as the highest frequency of the intelligence signal.
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The sampling rate must be at least 2 times the highest frequency of the intelligence signal.
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The sampling rate must be at least 1.5 times the highest frequency of the intelligence signal.
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The sampling rate must be at least 3 times the highest frequency of the intelligence signal.
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Explanation:
Detailed explanation-1: -Since this is a low-pass signal, it frequency characteristics starts at 0 Hz. Hence, the highest frequency in the spectrum is 200 kHz. Thus, the minimum sampling rate is 400 kHz.
Detailed explanation-2: -The minimum sampling rate allowed by the sampling theorem (fs = 2W) is called the Nyquist rate.
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