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 = Xq (t) – X (t)


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.

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