Embibe Experts Solutions for Chapter: Communication Systems, Exercise 1: Exercise

Explain point to point mode of communication.

What is a Signal in a communication system ?

State the difference between Analog and digital signal.

Explain the meaning of receiver in a communication system.

A modulating signal is a square wave, as shown below,

The carrier wave is given by $c \left(t\right)= 2 \sin \left(8\pi t\right) \mathrm{volts}.$ What is the modulation index?

For an amplitude modulated wave, the maximum amplitude is found to be $10 \mathrm{V}$  while the minimum amplitude is found to be $2 \mathrm{V}$. Determine the modulation index, $\mu .$ What would be the value of $\mu$  if the minimum amplitude is zero volt?

Due to economic reasons, only upper side-band of an AM wave is transmitted, but at the receiving station, there is a facility for generating the carrier. Show that if a device is available which can multiply two signals, then it is possible to recover the modulating signal at the receiver station.

Define modulation. Why is it necessary?