Amplitude Modulation
Amplitude Modulation
In amplitude modulation, the amplitude of the carrier is varied in accordance with the information signal. AM can be represented by expression Let c(t) =...
Modulation and its Necessity
Modulation is the process of variation of some characteristics of a carrier wave in accordance with the instantaneous value of a modulating signal.
Types of...
Propagation of Electromagnetic Waves
Propagation of electromagnetic waves
Ground (surface) wave propagation:
Ground or surface waves are the radio waves which travel along the surface of the earth as shown...
Bandwidth of Signals
The bandwidth of a signal is defined as the difference between the upper and lower frequencies of signal. In a communication system, the message...
Elements of Communication System
Each and every communication system has 3 essential elements and they are Transmitter
Communication Channel
Receiver In a communication system, the transmitter is located at...