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Noise power

In telecommunications, the term noise power has the following meanings: The measured total noise in a given bandwidth at the input or output of a device when the signal is not present; the integral of noise spectral density over the bandwidth.The power generated by a random electromagnetic process.Interfering and unwanted power in an electrical device or system.In the acceptance testing of radio transmitters, the supplied to the antennatransmission line by a radio transmitter when loaded with noise having a Gaussian amplitude-vs.-frequency distribution.Thermal noise power can be calculated by multiplying the noise spectral density with the signal bandwidthNp=kBTB,{\displaystyle N_{\text{p}}=k_{\text{B}}TB,} where: kB is the Boltzmann constant ≈ 1.38×10 J⋅K;T is the absolute temperature of the device; andB is the bandwidth.References This article incorporates public domain material from Federal Standard 1037C. General Services Administration.

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