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Thermal and Quantum Noise Abstracf-One purpose of &is article is to develop the theory of black body-radiation, thermal noise, and quantum noise from a few basic physical principles. A second purpose is to show how these resalts apply to certain areas such as antenna theory and ideal receivers. It is hoped that having this related material collected and presented in the language of the electronics engineer will be of tutorial value.

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The Search for Extraterrestrial Intelligence (SETI), now being planned at NASA, will require a prodigious amount of highly concurrent signal processing to be done in real time by special-purpose hardware.