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communications in-noise

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  • Noise measurement — is carried out in various fields. In acoustics, it can be for the purpose of measuring environmental noise, or part of a test procedure using white noise, or some other specialised form of test signal. In electronics it relates to the sensitivity …   Wikipedia

  • Noise figure — (NF) is a measure of degradation of the signal to noise ratio (SNR), caused by components in a radio frequency (RF) signal chain. The noise figure is defined as the ratio of the output noise power of a device to the portion thereof attributable… …   Wikipedia

  • Noise temperature — In electronics, noise temperature is one way of expressing the level of available noise power introduced by a component or source. The power spectral density of the noise is expressed in terms of the temperature (in kelvins) that would produce… …   Wikipedia

  • Noise (radio) — In radio reception, noise is the superposition of white noise (also called static ) and other disturbing influences on the signal, caused either by thermal noise and other electronic noise from receiver input circuits or by interference from… …   Wikipedia

  • Communications Act of 1934 — The Communications Act of 1934 is a United States federal law, enacted as Public Law Number 416, Act of June 19, 1934, ch. 652, 48 Stat. 1064, by the 73rd Congress, signed by President Franklin D. Roosevelt, codified as Chapter 5 of Title 47 of… …   Wikipedia

  • Noise (electronics) — Electronic noise [1] is a random fluctuation in an electrical signal, a characteristic of all electronic circuits. Noise generated by electronic devices varies greatly, as it can be produced by several different effects. Thermal noise is… …   Wikipedia

  • Noise floor — This article is about physics term. For the Bright Eyes album, see Noise Floor (Rarities: 1998 2005). In signal theory, the noise floor is the measure of the signal created from the sum of all the noise sources and unwanted signals within a… …   Wikipedia

  • Noise spectral density — In communications, noise spectral density No is the noise power per unit of bandwidth; that is, it is the power spectral density of the noise. It has dimension of power/frequency (see dimensional analysis), whose SI coherent unit is watts per… …   Wikipedia

  • Noise-canceling microphone — A noise canceling microphone is a microphone designed to filter out ambient noise from the desired sound, especially useful in noisy environments. Contents 1 Technical detail 2 Alternative technologies 3 Applications …   Wikipedia

  • noise — /noyz/, n., v., noised, noising. n. 1. sound, esp. of a loud, harsh, or confused kind: deafening noises. 2. a sound of any kind: to hear a noise at the door. 3. loud shouting, outcry, or clamor. 4. a nonharmonious or discordant group of sounds. 5 …   Universalium

  • Noise margin — In electrical engineering, noise margin is the amount by which a signal exceeds the minimum amount for proper operation. It is commonly used in at least two contexts: In communications system engineering, noise margin is the ratio by which the… …   Wikipedia

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