Question

Consider a PCM system wth $n=8$ bits/sample. It is intended to increase the signal to quantization noise ratio of the existing system by 6 dB, by increasing the value of n. Then the corresponding increment in the required channel bandwidth will be _______$\%$

• A. 12.5

Answer 1

The correct option is A 12.5
For 6 dB increment in SQNR, $n$ should be increased by 1.

$\left(BW\right)\infty n{n}_{old}=8;n_{new}=9\%Incrementin\left(BW\right)=\frac{9-8}{8}\times 100=\frac{100}{8}=12.5\%$