- Source: 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 mean power supplied to the antenna transmission line by a radio transmitter when loaded with noise having a Gaussian amplitude-vs.-frequency distribution.
Noise power can be calculated by multiplying the noise spectral density with the signal bandwidth
N
p
=
k
B
T
B
,
{\displaystyle N_{\text{p}}=k_{\text{B}}TB,}
where
kB = Boltzmann constant ≈ 1.38×10−23 J⋅K−1
T = absolute temperature of the device
B = bandwidth
References
This article incorporates public domain material from Federal Standard 1037C. General Services Administration. Archived from the original on 2022-01-22. (in support of MIL-STD-188).
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