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What is the Nyquist rate in a communication system?

Practice Questions

Q1
What is the Nyquist rate in a communication system?
  1. The minimum sampling rate to avoid aliasing
  2. The maximum data rate achievable
  3. The frequency of the carrier wave
  4. The bandwidth of the communication channel

Questions & Step-by-Step Solutions

What is the Nyquist rate in a communication system?
  • Step 1: Understand that signals can have different frequencies, which are how fast the signal changes.
  • Step 2: Know that when we want to process or transmit a signal, we need to sample it, which means taking measurements at certain intervals.
  • Step 3: Realize that if we sample too slowly, we can lose important information about the signal. This is called aliasing.
  • Step 4: The Nyquist rate tells us how fast we need to sample to avoid losing information.
  • Step 5: The Nyquist rate is calculated as twice the highest frequency present in the signal.
  • Step 6: For example, if the highest frequency of the signal is 1000 Hz, the Nyquist rate would be 2000 Hz.
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