ISRO Scientist or Engineer Electronics 2015
For the following questions answer them individually
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?
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 $$c = 3 \times 10^8 m/s$$)
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?
A digital signal processing system is described by the expression:
$$y(n) = 2x(n) + x(n - 1) + 2y(n - 1)$$
The system is:
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:
