Dependence of wireless channel capacity on the system operating temperature
The system temperature would directly affect the thermal noise power, which in turn would affect the signal-to-noise ratio and hence your capacity. As a starting point, you can use the following expression to calculate the thermal noise power
$$
\begin{align}
N &amp;= K_{b} T B F \\[5pt] 
N &amp;- \text{Noise power (W)} \\
K_{b} &amp;- \text{Boltzmann's constant} = 1.3807 \times 10^{-23} ~\text{JK}^{-1} \\
T &amp;- \text{System temperature (K)} \\
B &amp;- \text{Bandwidth (Hz)} \\
F &amp;- \text{Noise figure}
\end{align}$$
where all the terms are in scalar form (not in dB). Naturally, there could be additional noise effects apart from the thermal noise power.