In a PCM system, the bit error rate due to channel noise is 10 4 Assume that the peak signal-to-noise ratio on the recovered analog signal needs to be at least 30 dB. (a) Find the minimum number of quantizing steps that can be used to encode the analog signal into a PCM signal. (b) If the original analog signal had an absolute bandwidth of 2.7 kHz, what is the null bandwidth of the PCM signal for the polar NRZ signaling case?

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