Twenty-four voice signals are sampled uniformly and then time-division multiplexed. The sampling operation uses flat-top samples (Natural Sampling) with 1 μs duration. The multiplexing operation includes provision for synchronization by adding an extra pulse of sufficient amplitude and also 1 μs duration. The highest frequency component of each voice signal is 3.4 kHz.

a) Assuming a sampling rate of 8 kHz, calculate the spacing between successive pulses of the multiplexed signal.

b) Repeat your calculation assuming the use of Nyquist rate sampling.

c) Sketch the timing and synchronization signals needed at the receiver to correctly recover the pulses for each of the twenty-four sources.