Main Content

systemp

Receiver system-noise temperature

Syntax

STEMP = systemp(NF)
STEMP = systemp(NF,REFTEMP)

Description

STEMP = systemp(NF) calculates the effective system-noise temperature, STEMP, in kelvin, based on the noise figure, NF. The reference temperature is 290 K.

STEMP = systemp(NF,REFTEMP) specifies the reference temperature.

Input Arguments

NF

Noise figure in decibels. The noise figure is the ratio of the actual output noise power in a receiver to the noise power output of an ideal receiver.

REFTEMP

Reference temperature in kelvin, specified as a nonnegative scalar. The output of an ideal receiver has a white noise power spectral density that is approximately the Boltzmann constant times the reference temperature in kelvin.

Default: 290

Output Arguments

STEMP

Effective system-noise temperature in kelvin. The effective system-noise temperature is REFTEMP*10^(NF/10).

Examples

collapse all

Calculate the system noise temperature of a receiver with a 300 K reference temperature and a 5 dB noise figure.

T = systemp(5,300)
T = 948.6833

References

[1] Skolnik, M. Introduction to Radar Systems. New York: McGraw-Hill, 1980.

Extended Capabilities

Introduced in R2011a