engineering recuitment GATE ECE 2023-24 Test Series Communication Systems Introduction To Digital Modulation Baseband Modulation
24 voice channels are sampled uniformly at a rate of 8 kHz and then time division multiplexed. The sampling process uses flat-top samples with 1 μs duration. The multiplexing operation includes the provision of synchronization by adding an extra pulse of 1 μs duration. The spacing between successive pulses of the multiplexed signal is:
1
4 μs
2
6 μs
3
7.2 μs
4
8.4 μs