In radio communication, a spurious emission is any component of a radiated
radio frequency
Radio frequency (RF) is the oscillation rate of an alternating electric current or voltage or of a magnetic, electric or electromagnetic field or mechanical system in the frequency range from around to around . This is roughly between the up ...
signal the complete suppression of which would not impair the integrity of the modulation type or the information being transmitted. A radiated signal outside of a
transmitter
In electronics and telecommunications, a radio transmitter or just transmitter is an electronic device which produces radio waves with an antenna. The transmitter itself generates a radio frequency alternating current, which is applied to the ...
's assigned channel is an example of a spurious emission. Spurious emissions can include
harmonic emissions,
intermodulation
Intermodulation (IM) or intermodulation distortion (IMD) is the amplitude modulation of signals containing two or more different frequencies, caused by nonlinearities or time variance in a system. The intermodulation between frequency comp ...
products and frequency conversion products.
ITU, 1.145 Spurious emission
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See also
*Interference (communication)
In telecommunications, an interference is that which modifies a signal in a disruptive manner, as it travels along a communication channel between its source and receiver. The term is often used to refer to the addition of unwanted signals ...
*Radio spectrum pollution
Radio spectrum pollution is the straying of waves in the radio and electromagnetic spectrums outside their allocations that cause problems for some activities. It is of particular concern to radio astronomer
Radio astronomy is a subfield of a ...
References
Radio technology
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