Tag: Radio communication
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Modulation in Communication Systems
Introduction Modulation is the process of changing some characteristics (e.g. Amplitude, Frequency, or Phase) of a carrier wave in accordance with the intensity of the message signal. Modulation means to ‘’change’’. In Modulation, some characteristics of the carrier wave is changed in accordance with the intensity i.e. amplitude of the message signal. The resultant wave…
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General Principles of Radio Broadcasting, Transmission and Reception
Radio communication is the radiation of radio waves by the transmitting station, the propagation of these waves through the space and their reception by the radio receiver. The figure above shows the general principles of radio broadcasting, transmission and reception. We can divide the entire arrangement into 3 major sections, namely: Transmitter This equipment is…
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The Fundamentals of Oscillators in Communication Systems
A communication system consists of an input device, a transmitter, a transmission medium, receiver and output device. The input device can be a computer, sensor or oscillator, depending on the application of the system, while the output device could be a speaker or computer. The input device and transmitter makes up the source section. The…