Communication Engineering Important Questions and Answers

Communication Engineering Important Questions and Answers:

1. Define quantization error.

Answer:

The difference between the instantaneous value of the quantized signal and input signal is called quantization error,

ε = X_q (t) – X (t)

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2. What is information rate?

Answer:

If the source of the message generates ′γ′ number of messages per second then the information rate is given by,

R = γ x H

• γ = number of message/sec.
• H = Average information/message
• R = Average information per second expressed in bits/sec.

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3. What are the essential components of a satellite systems?

Answer:

1. Transmitting Earth Station.
2. Dish Antenna
3. Satellite
4. Parabolic Antenna
5. Receiving Earth station

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