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Branch of telecommunications and informatics, responsible for technology transfer of information and logic tools to data flow control and transmission through various media.
1) The effect of unwanted energy due to one or a combination of emissions, radiations, or inductions upon reception in a radiocommunication system, manifested by any performance degradation, misinterpretation, or loss of information which could be extracted in the absence of such unwanted energy. 2) In general, extraneous energy, from natural or man-made sources, that impedes the reception of desired signals.
A phenomenon in which two waves superimpose to form a resultant wave of greater or lower amplitude. Interference usually refers to the interaction of waves that are correlated or coherent with each other, either because they come from the same source or because they have the same or nearly the same frequency.
1) The distance from transmitter outside which no harmful interference will occur. 2) The distance from interfering transmitter to the point where the gap between the levels of the receiver input power signal and interfering is less than a certain, determined by measurements, the protection ratio.
The radio signal causing interference in radio receiver.
A technical and regulatory process which is intended to remove or mitigate radio-frequency interference between different radio systems which utilize the same or adjacent operational frequency channel.
The electromagnetic wave, which is radiated from the Earth, bent in the ionosphere and directed back toward the Earth's surface.
Hypothetical antenna that radiates its power uniformly in all directions (in a full solid angle).
Antenna's power gain equals 0 dBi.