Q. Which are the common transmission media used in digital communication system?

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Q. The basic transmission-reception system is a ______ system.

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Q. Modulation channel consists of

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Q. Modulation channel does not accept an analog input signal.

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Q. If operating frequency bands are higher ______ is available.

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Q. Ground wave communication occurs in

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Q. Sampling theorem is used for converting

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Q. A signal can be recovered from its sample by using

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Q. Which is practically realizable?

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Q. In flat top sampling scheme, ______ is kept constant after sampling.

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Q. Loop filter is a ______ used to reduce noise.

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Q. A stationary stochastic process has

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Q. The power spectral density function of the stochastic process is

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Q. For a periodic function, the spectral density and auto correlation functions form

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Q. The capacity of a channel is given by

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Q. In a communication system, a process in which statistical averages and time averages are equal is called as

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Q. A rectangular pulse of duration T is applied to a matched filter. The output of the filter is a

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Q. The line code has a zero dc component for pulse transmission of random binary data is

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Q. The auto-correlation of white noise is

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Q. Ionospheric communication can take place in

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