NOISE POWER DENSITY

The noise power in a bandwidth of 1 Hz, i.e. , the noise power per hertz at a point in a noise spectrum. Note: The noise-power density of the internal noise that is contributed by a receiving system to an incoming signal is expressed as the product of Boltzmann's constant , k, and the equivalent noise temperature , T n . Thus, the noise-power density is often expressed simply as k T . Synonym k T . [ From Weik '89 ]