Question: 1 . What are the differences between TDMA, FDMA? An AWGN channel with a total bandwidth of 4 8 8 kHz is shared by 4

1. What are the differences between TDMA, FDMA? An AWGN channel with a total bandwidth of 488kHz is shared by 4 users using QPSK modulation at rate of 240kbps. Using Nyquist criterion for transmission for no Inter symbol interference ISI, calculate the minimum bandwidth required by each user, and show
a) the corresponding frequency division for 4 users in case of FDMA with derived frequency-slot and frequency guard band sizes.
b) the corresponding time division for 4 users in case TDMA using a time frame of 10 ms, with derived timeslot and guard-time sizes.

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