Question

3. The Nyquist formula informs us about the capacity in a noiseless channel and the
Shannon's formula informs us of the capacity of a noisy channel. In practice, we mostly
encounter noisy channels so why do we still need the Nyquist formula? [2 marks]
Nyquist formula: Bit rate 2 x bandwidth x log2 L
Shannon formula: C-Bx log: (1+ SNR)
a. Answer:

Answer 1

It is true that in practice we mostly encounter noisy channels and use Shannon formula for that.

But we still need Nyquist formula because it gives us the upper bound for the capacity of a channel. It gives us the upper limit that a channel capacity can reach