Physics
Scientific paper
Mar 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976ieees..13...42m&link_type=abstract
IEEE Spectrum, vol. 13, Mar. 1976, p. 42-47.
Physics
Extraterrestrial Life, Extraterrestrial Radio Waves, Interstellar Communication, Phased Arrays, Signal Detection, Data Processing, Fast Fourier Transformations, Feasibility Analysis, H Lines, Intelligence, Microwave Spectra, Universe
Scientific paper
The Search for Extraterrestrial Intelligence project aimed at determining the feasibility of searching for signals from co-intelligences is discussed. A phased array of paraboloidal dishes, each 100 m in diameter, would be used to detect 1 to 2 GHz signals. This frequency band is considered most favorable since it contains the hydrogen line at 1.420 GHz and the strong hydroxyl line at 1.667. Since the phase of the incoming signal is unknown, a square-law detector will be used to search for sine waves. The selection of pointing directions is considered, and the possible types of data processing for the system are discussed. A digital fast Fourier transform processor and correlator with a time-bandwidth product of 2 million is under development in connection with the project.
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