An experiment protocol for a search for radio signals of extraterrestrial intelligent origin in the presence of man-made radio frequency sources

Details An experiment protocol for a search for radio signals of extraterrestrial intelligent origin in the presence of man-made radio frequency sources An experiment protocol for a search for radio signals of extraterrestrial intelligent origin in the presence of man-made radio frequency sources

Sep 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977prag.iafcq....e&link_type=abstract

International Astronautical Federation, International Astronautical Congress, 28th, Prague, Czechoslovakia, Sept. 25-Oct. 1, 197

Mathematics

Probability

Extraterrestrial Life, Interstellar Communication, Radio Astronomy, Radio Frequency Interference, Error Correcting Devices, Probability Theory, Radio Signals, Signal Analysis, Sky Surveys (Astronomy), Systems Engineering

Scientific paper

Some aspects of signal extraction in a microwave search for evidence of extraterrestrial intelligence are examined. Parametric relations are summarized which are applicable to a microwave search of constrained duration that employs FFT spectrum-analyzer receivers, with sensitivity enhancement by spectrum accumulation and detection by a threshold criterion. Three types of natural and man-made false alarms are identified, the probability of false alarm in a single data channel is computed, and the implications of false alarms for a constant-beamwidth sky survey are considered. It is shown that the key to an efficient search is the prompt and unambiguous elimination of false alarms. An experimental protocol is suggested which eliminates spurious signals primarily through procedural techniques involving antenna repointing, delayed repeated observations, and storage of particular historical parameters for suspect signals.

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