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Anything related to signal theory, i.e. the branch of applied mathematics and engineering studying the properties of signals and the mathematical tools used to manipulate them.

6 votes

Is it possible to receive information if the received power is below the noise floor?

As a practical adjunct to Marcus Müller's excellent answer... Ham radio has a number of digital modes suitable for successful signal reception below the noise floor. These numbers have a caveat, whi …
Eric Towers's user avatar