1. Consider an audio low-pass signal $m(t)$ with bandwidth 4 kHz and range
[-2 volt, 2 volt].
(a) Find the minimum sampling rate (in samples/second) for $m(t)$.
(b) If we want to keep the quantization error less than 0.01 volt, how many bits
are needed to represent each sample?
(c) Find the minimum transmission rate (in bps, bits/second) for $m(t)$.
(d) Consider 10 low-pass signals, each of which has the same bandwidth, range,
requirement of quantization error as $m(t)$. If a transmission line transmits
these 10 signals using TDM and 16-ary PAM, find the maximum length of
each 16 PAM signal (in second).