4.1 Binary data is transmitted through an Additive White Gaussian Noise (AWGN) channel with SNR=3.5 dB and bandwidth B. Channel coding is used to ensure reliable communications. Then:
i. What is the maximum bit rate that can be transmitted?
ii. If the bit rate is increased to 3B, how much must the channel SNR be increased to ensure reliable transmission?

4.2 Binary data is transmitted at the rate of Rb bits/sec over a channel occupying a bandwidth B and the channel SNR=3 dB. If the data bit rate is increased to 2.65Rb and the bandwidth is increased to 1.75B:
i. What would be the channel SNR for the new system?
ii. What channel bandwidth is required to keep the same channel signal-to-noise ratio?


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