SNR


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SNR

Abbrev. for supernova remnant.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006

SNR

(electronics)
(astronomy)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

SNR

This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

signal-to-noise ratio

The ratio of the power or volume (amplitude) of a signal to the amount of disturbance (the noise) mixed in with it. Measured in decibels, signal-to-noise ratio (SNR, S/N) measures the clarity of the signal in a circuit or a wired or wireless transmission channel. See interference-to-noise ratio.

The Larger the Number, the Better
The greater the ratio (the larger number), the less noise and more easily it can be filtered out. The lowest number is an SNR of 0, which means that noise and signal levels are the same. Although signals contain non-random intelligence and can be isolated and separated, with a 0 SNR, it is more difficult to isolate the signal in real time and might be better handled in a batch process offline.

As a Metaphor (Quality vs. Junk)
The terms "signal" and "noise" are also commonly used to refer to meaningful content (signal) versus useless content (noise). For example, in a search engine result, signal refers to relevant results compared to the noise, which is information of little value. The terms can be applied to any quantity of material that is valuable versus that which is not.
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References in periodicals archive ?
SNR [[gamma].sub.ri] of signal [Y.sub.ri] (t) in the ith relay is
Judge Everett said Barton snr's strategy to make Mrs Willey dependant on him included "poisoning" her against loved ones and close friends.
Judge Everett said this was "completely false", yet Barton snr repeated it to Mrs Willey, who believed him and sacked the gardener.
Richardson Snr, of Gilmerton, Edinburgh, was jailed for 18 months after pleading guilty to having PS1320 of cocaine in his van in Edinburgh last March.
The improved SNR of the normal and abnormal LSSs is particularly achieved at the [L.sub.j] range of 64-1024 and 512-2048, respectively, at the determined [[mu].sub.n].
Similarly, there is also abundant literature on SNR estimation based on the preamble [5].
The new Sonis range of Helmet Mounted Ear Defenders easy attach and detach from the universal slot of JSP Helmets and through rigorous testing JSP can guarantee that correct SNR's are reached when worn with their EVOlite, EVO 2, EVO3, Global Standard EVO5 Olympus Helmet and Skyworker Helmet.
Figures 7 and 8 show the ROC curves of the four different signal features combined with the K-means clustering algorithm in SNR = -10 and SNR = -12 conditions, respectively.
where [[gamma].sub.0] is the SNR of the received signal at R.
The MR nodes utilize their individual uplink CSI to select the best MR that yields the maximum received SNR. The best MR sends flag packets to the MD, announcing that it is ready to cooperate.