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
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