In Huffman Coding the input is assigned a variable length code. The smallest code is assigned to the character which occurs the most.

The convolution theorem states that the transform of convolution of f1(t) and f2(t) is the product of individual transforms F1(s) and F2(s).

In order to make communication more safer and reliable digital signals are used. The basic digital modulation techniques are ASK, PSK,FSK and MSK

The IMPATT diode (Impact ionization Avalanche Transit-Time) is one which is used in high frequency applications and is a high power diode.

The Adaptive Delta Modulation technique helped to overcome the problem of granular noise in delta modulation.

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Whenever a signal is sampled below Nyquist rate (fs < 2B), the signal is called under sampled and the Aliasing effect hampers the results.

Encoders convert 2N lines of input into a code of N bits and Decoders decode those N bits into 2N lines.

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