#!/usr/bin/env python
# pylint: disable=E1103
from typing import cast
import scipy.constants
from ..util.conversion import linear2dBm
[docs]def calc_thermal_noise_power_dBm(T: float, delta_f: float) -> float:
"""
Calculate the thermal noise power (in dBm) for the given room temperature
`T` (in Cº) and bandwidth `delta_f` (in Hz).
Parameters
----------
T : float
Room temperature in Cesium degrees.
delta_f : float
Bandwidth in Hz.
Returns
-------
noise_var : float
The noise power.
"""
# Boltzmann constant
B = cast(float, scipy.constants.Boltzmann)
K = T + 273.0
noise_power = B * K * delta_f
noise_power_dBm = linear2dBm(noise_power)
return noise_power_dBm