Electronics and Communication Engineering - Exam Questions Papers - Discussion


A communication channel with AWGN operating at a signal to noise ratio SNR >> 1 and bandwidth B has capacity C1. If the SNR is doubled keeping B constant, the resulting capacity C2 is given by

[A]. C2 ≈ 2C1
[B]. C2 ≈ C1 + B
[C]. C2 ≈ C1 + 2B
[D]. C2 ≈ C1 + 0.3B

Answer: Option B


C = B log2[1 + SNR]

C = B log2[SNR]

C' = B log2[2SNR] = B log2 SNR + B log22

C' = C1 + B.

Post your comments here:

Name *:

Email   : (optional)

» Your comments will be displayed only after manual approval.