A signal bandlimited to 1 MHz is sampled at a rate 30% above the Nyquist rate and quantized into 256

A signal bandlimited to 1 MHz is sampled at a rate 30%
above the Nyquist rate and quantized into 256 levels using a _-law
quantizer with _ = 255.

(a) Determine the approximate SNR.

(b) Assume that the SNR (the received signal quality)
found in part (a) was unsatisfactory. It must be increased at least by 3 dB.
Would you be able to obtain the desired SNR without increasing the transmission
bandwidth (or data rate) if a sampling rate 8% above the Nyquist rate were
found to be adequate? If so, explain how. What is the maximum SNR that can be
realized in this way?

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