Receiver noise power
Compute Receiver Noise Power with Specified Temperature
Calculate the noise power of a receiver having a noise bandwidth of 10 kHz, a noise figure of 1 dB, and a reference temperature of 300 K.
npower = noisepow(10e3,1,300)
npower = 5.2144e-17
NBW — Noise bandwidth of the receiver
Noise bandwidth of the receiver in hertz, specified as a positive scalar. For a superheterodyne receiver, the noise bandwidth is approximately equal to the bandwidth of the intermediate frequency stages .
NF — Noise figure
Noise figure in decibels, specified as a nonnegative scalar. The noise figure is a dimensionless quantity that indicates how much a receiver deviates from an ideal receiver in terms of internal noise. An ideal receiver only produces the expected thermal noise power for a given noise bandwidth and temperature. A noise figure of 1 (0 dB) indicates that the noise power of a receiver equals the noise power of an ideal receiver. Because an actual receiver cannot exhibit a noise power value less than an ideal receiver, the noise figure is always greater than or equal to 1 (0 dB).
REFTEMP — Reference temperature
Reference temperature in kelvins, specified as a nonnegative scalar. This argument specifies the temperature of the receiver. Typical values range from 290 to 300 kelvins.
NPOWER — Noise power
Noise power in watts, returned as a nonnegative scalar. The internal noise power contribution of the receiver to the signal-to-noise ratio.
 Skolnik, M. Introduction to Radar Systems. New York: McGraw-Hill, 1980.
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Usage notes and limitations:
Does not support variable-size inputs.
Introduced in R2011a