(Solved): Question 5: A voice signal in the range of 300 to \( 3300 \mathrm{~Hz} \) is ...

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Question 5: A voice signal in the range of 300 to \( 3300 \mathrm{~Hz} \) is sampled at 8000 samples/s. We may transmit these samples directly as PAM pulses or we may first convert each sample to a PCM format and use binary (PCM) waveforms for transmission. a) What is the minimum system bandwidth required for the detection of PAM with no ISI and with a filter roll-off characteristic of \( r=1 \). b) Using the same filter roll-off characteristic, what is the minimum bandwidth required for the detection of binary ( \( \mathrm{PCM}) \) waveforms if the samples are quantized to eight levels? c) Repeat part b) using 128 quantization levels. [Weight: 20\%] Question 6: An analog signal \( m(t)=4 \cos (2 \pi 500 t) \) is to be converted to digital signals using linear PCM and nonlinear PCM. The required SQNR is to be at least 30 \( \mathrm{dB} \). Determine the minimum transmission bandwidth required for each of these two schemes (Assume \( \mu=100 \) for nonlinear PCM).