ISRO Electronics & Communication (ECE) 2018 - Question 33

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Topic: Digital Communication

Benefit(s) of Bandpass sampling over low pass sampling

  • A. It reduces speed requirement of A/D convertor
  • B. Increase the amount of digital memory necessary to capture a given interval of signal
  • C. Both (a) and (b) are correct
  • D. Both (a) and (b) are incorrect

Answer: A. It reduces speed requirement of A/D convertor

Explanation: Bandpass sampling (also known as undersampling) allows a bandpass signal to be sampled at a rate determined by its bandwidth rather than its highest frequency. This significantly reduces the required sampling rate, which in turn reduces the speed requirement of the A/D converter and decreases the memory needed to store the sampled data.

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