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BARC 2018 ECE: Communication Nuclear Quiz 3
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Question 1
A CDMA system is designed based on DS spread spectrum with a processing gain of 1000 and BPSK modulation scheme. If user has equal power and the desired level of performance of an error probability of 10–6, the no. of user will be
Question 2
The power spectral density of a real stationary random process .X(t) is given by
The value of the expectation
The value of the expectation
Question 3
A binary baseband digital communication system employs the signal
for transmission of bits. The graphical representation of the matched filter output y(t) for this signal will be
for transmission of bits. The graphical representation of the matched filter output y(t) for this signal will be
Question 4
In the circuit shown, the positive angular frequency ω (in radians per second). at which magnitude of the phase difference between the voltages V1 and V2 equals 
radians, is ___.
radians, is ___. Question 5
In a digital communication system, the overall pulse shape p(t) at the receiver before the sampler has the Fourier transform P(f). If the symbols are transmitted at the rate of 2000 symbols per second, for which of the following cases is inter symbol interference zero?
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