In the paper you can get description regarding network, the output noise, noise, noise spectrum, and sensitivity. There are many info about measurement, equation, spectrum, detector, and frequency noise are explained in this paper.
This paper contains things around bandwidth, thermal noise, sensitivity measurement, receiver sensitivity, and the signal generator. These are selected from this paper:
As the communication industry pushed above 30 mc, especially as stimulated by the pressures of World War 11, it was found that the external noise sources had dropped to negligible proportions, compared to internal receiver noise, above 100 mc. The need for greater and greater radar sensitivity, VHF communication range, and less “snowy” TV pictures rapidly pushed internal receiver noise down to the level where cosmic radio background radiation (popularly called cosmic “noise”, due to its randomly fluctuating character) limits useful receiver sensitivity from 30 to 100 mc, or down to 10 mc in the absence of man-made and atmospheric noise.
Furthermore, this paper tells you discussion about signal, measurements, noise ratio, error, and the output signal.