ISRO Scientist or Engineer Electronics 2015
For the following questions answer them individually
ISRO Scientist or Engineer Electronics 2015 - Question 21
The noise figure of a device is 2. If input SNR is 37 dB, what would be output SNR?
ISRO Scientist or Engineer Electronics 2015 - Question 22
What is the limit of Eb/No, below which reliable communication is not possible?
ISRO Scientist or Engineer Electronics 2015 - Question 23
A satellite communication link has uplink C/No of 50 dB-Hz and downlink C/No of 47 dB-Hz. What would be overall link C/No?
ISRO Scientist or Engineer Electronics 2015 - Question 24
A signal transmitted from an Earth station bounces back from a geostationary satellite, with an altitude of 35864 km from the Earth surface. The range from the Earth station is
38200 km. The round trip time is about: (excluding processing delays and assuming $$c = 3 \times 10^8 m/s$$)
ISRO Scientist or Engineer Electronics 2015 - Question 26
Which of the following is not true?
ISRO Scientist or Engineer Electronics 2015 - Question 27
The following Finite State Machine (FSM) is used to detect a particular pattern in input data stream. Whenever the pattern is matched at input, output is set to ‘l’ or else output is cleared to ‘0’. For which of the following data stream, output goes to ‘1’ twice?
ISRO Scientist or Engineer Electronics 2015 - Question 28
A digital signal processing system is described by the expression:
$$y(n) = 2x(n) + x(n - 1) + 2y(n - 1)$$
The system is:
ISRO Scientist or Engineer Electronics 2015 - Question 29
The rectangular window hasrelative side-lobe level:
ISRO Scientist or Engineer Electronics 2015 - Question 30
Consider the discrete time signal $$x(n) = \left\{1, 1, 1, 1, 0.5, 0.5 \right\}. y(n) = conv (\delta(n - 1), x(n))$$ is:
