If the number of bits per sample in a PCM system is increased from 8 to 16, then the bandwidth will be increased by

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ESE Electrical 2015 Paper 2: Official Paper
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  1. 2 times
  2. 4 times
  3. 8 times
  4. 16 times

Answer (Detailed Solution Below)

Option 1 : 2 times
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Detailed Solution

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Concept:

The number of levels for an n-bit PCM system is given by:

L = 2n

Also, the bandwidth of PCM is given by:

\(BW=n{f_s}\)

n = number of bits to encode

fs = sampling frequency

Calculation:

For n = 8, the bandwidth will be:

B.W. = 8 fs

Similarly, For n = 16, the bandwidth will be:

B.W. = 16 fs

We observe that the Bandwidth is increased by 2 times.

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