About: Additive white Gaussian noise

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Additive white Gaussian noise (AWGN) is a basic noise model used in information theory to mimic the effect of many random processes that occur in nature. The modifiers denote specific characteristics: * Additive because it is added to any noise that might be intrinsic to the information system. * White refers to the idea that it has uniform power across the frequency band for the information system. It is an analogy to the color white which has uniform emissions at all frequencies in the visible spectrum. * Gaussian because it has a normal distribution in the time domain with an average time domain value of zero.

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rdf:type	person
rdfs:label	Additive white Gaussian noise (en)
rdfs:comment	Additive white Gaussian noise (AWGN) is a basic noise model used in information theory to mimic the effect of many random processes that occur in nature. The modifiers denote specific characteristics: * Additive because it is added to any noise that might be intrinsic to the information system. * White refers to the idea that it has uniform power across the frequency band for the information system. It is an analogy to the color white which has uniform emissions at all frequencies in the visible spectrum. * Gaussian because it has a normal distribution in the time domain with an average time domain value of zero. (en)
sameAs	Additive white Gaussian noise Additive white Gaussian noise
dbp:wikiPageUsesTemplate	dbt:One_source dbt:Reflist dbt:Short_description dbt:Noise
Subject	Noise (electronics) Time series models
thumbnail	wiki-commons:Special:FilePath/Zero_crossing.jpg?width=300
foaf:depiction
gold:hypernym	Model
prov:wasDerivedFrom	http://en.wikipedia.org/wiki/Additive_white_Gaussian_noise?oldid=1051832268&ns=0
Wikipage page ID	202097 (xsd:integer)
page length (characters) of wiki page	14647 (xsd:nonNegativeInteger)
Wikipage revision ID	1051832268 (xsd:integer)
Link from a Wikipage to another Wikipage	Ground bounce Noisy-channel coding theorem Nonlinear system Normal distribution Probability theory Asymptotic equipartition property Bandwidth (signal processing) Black-body radiation White noise Wideband Central limit theorem Frequency Noise (electronics) Differential entropy Dispersion (optics) Jitter Mutual information Channel capacity Phasor Communication channel Hertz Spectral density Sphere packing Visible spectrum Gaussian process Independent and identically distributed random variables Fading Fano's inequality Information theory Interference (communication) Johnson–Nyquist noise Satellite Typical set Variance Watt Rayleigh distribution Shot noise Signal-to-noise ratio Time series models
has abstract	Additive white Gaussian noise (AWGN) is a basic noise model used in information theory to mimic the effect of many random processes that occur in nature. The modifiers denote specific characteristics: * Additive because it is added to any noise that might be intrinsic to the information system. * White refers to the idea that it has uniform power across the frequency band for the information system. It is an analogy to the color white which has uniform emissions at all frequencies in the visible spectrum. * Gaussian because it has a normal distribution in the time domain with an average time domain value of zero. Wideband noise comes from many natural noise sources, such as the thermal vibrations of atoms in conductors (referred to as thermal noise or Johnson–Nyquist noise), shot noise, black-body radiation from the earth and other warm objects, and from celestial sources such as the Sun. The central limit theorem of probability theory indicates that the summation of many random processes will tend to have distribution called Gaussian or Normal. AWGN is often used as a channel model in which the only impairment to communication is a linear addition of wideband or white noise with a constant spectral density (expressed as watts per hertz of bandwidth) and a Gaussian distribution of amplitude. The model does not account for fading, frequency selectivity, interference, nonlinearity or dispersion. However, it produces simple and tractable mathematical models which are useful for gaining insight into the underlying behavior of a system before these other phenomena are considered. The AWGN channel is a good model for many satellite and deep space communication links. It is not a good model for most terrestrial links because of multipath, terrain blocking, interference, etc. However, for terrestrial path modeling, AWGN is commonly used to simulate background noise of the channel under study, in addition to multipath, terrain blocking, interference, ground clutter and self interference that modern radio systems encounter in terrestrial operation. (en)
foaf:isPrimaryTopicOf	http://en.wikipedia.org/wiki/Additive_white_Gaussian_noise
is Wikipage redirect of	Additive White Gaussian Noise Additive white gaussian noise Additive Gaussian white noise Additive noise AWGN Gaussian channel
is Link from a Wikipage to another Wikipage of	List of statistics articles List of things named after Carl Friedrich Gauss Location parameter Macrodiversity Noise (electronics) Noise (signal processing) Noise temperature Noisy-channel coding theorem Non-orthogonal frequency-division multiplexing Nonlinear filter Normal distribution Aaron D. Wyner Additive White Gaussian Noise Additive white gaussian noise Anscombe transform Autoencoder BCJR algorithm Bit error rate Glossary of electrical and electronics engineering Channel capacity DVB-S2 Linear–quadratic–Gaussian control Coding gain Communication channel Constant false alarm rate Gaussian noise Index of physics articles (A) Information theory Kosambi–Karhunen–Loève theorem Estimation theory Matched filter Maximal-ratio combining

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