The sections in this article are
Receiver Noise and Noise Factor
Environmental Noise and Antenna Noise Figure
Applicability of Published Man‐Made Noise Statistics to Contemporary Environments
In this article, important sources of receiver noise are described and the concept of receiver noise factor is developed. The noise factor concept is then extended to cover the entire radio receiving system, including the receiving antenna and environmental noise. This is followed by a description of important environmental noise sources.
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