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# GATE 2024 Communication System Foundation Quiz 36

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Question 1

A data with a rate of 500 KbPS is to be transmitted using BPSK modulation. If the baseband modelling of the data is done by a raised cosine filter with a roll-off factor of 0.50, then the minimum channel bandwidth required to transmit the BPSK modulated signal will be ____ kHz.

Question 2

Assume that 4800 bits/sec random data are sent over a bandpass channel by BPSK signaling. What is the required transmission bandwidth in kHz such that the spectral envelope is down at least 35 dB outside this band ? [use sinc2(17.57) = 10-7/2]

Question 3Multiple Correct Options

A BPSK system for a bandlimited channel with bandwidth 4500 Hz where the spectral envelope must be at least 30 dB below the maximum outside the channel. Which of the following is/are correct? [Assume ]

Question 4

Consider a BPSK system for a bandlimited channel with BT = 3000 Hz where the spectral envelope must be at least 30 dB below the maximum outside the channel. The maximum data rate to achieve this objective is ---------bits/sec. [assume sinc2(3.9) = 10-3]

Question 5

In digital transmission, binary rate is represented by raised cosine function with roll-off factor is 0.2 and transmitted using QPSK modulation, then the bandwidth efficiency____%
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