Q. In down-conversion multiplication with cosine wave is followed by

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Q. A band-pass signal can be down-converted using

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Q. A base-band signal can be up-converted using

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Q. Properties of Fourier transform are

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Q. Properties of impulse function are

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Q. In the digital communication system, signals in different frequency bands are

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Q. Voltage generated by lightning is an example for

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Q. Which has minimum power loss during transmission?

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Q. Possible timing error detection methods are

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Q. Two clock with rates T1 and T2 are incommensurate if its ratio is

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Q. Non uniform tree _____ bit rate.

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Q. The weighing matrix is

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Q. Satellite communication takes place in

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Q. Ionospheric communication can take place in

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Q. The auto-correlation of white noise is

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

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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. The capacity of a channel is given by

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

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