Computer Science
Scientific paper
Nov 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jbis...33..391c&link_type=abstract
British Interplanetary Society, Journal (Interstellar Studies), vol. 33, Nov. 1980, p. 391-395.
Computer Science
1
Bandwidth, Extraterrestrial Communication, Microwave Transmission, Project Seti, Signal To Noise Ratios, Spread Spectrum Transmission, Broadband, Channel Capacity, Focusing, Interstellar Radiation, Multichannel Communication, Pulse Compression, Wave Dispersion
Scientific paper
The present interest in the search for narrow-band signals in connection with SETI as well as its reasons and implications are considered. As an alternative, and considering the advantages of spread spectrum techniques in terms of higher communications capacity, the use of a wide-band transmission strategy is examined. The effects of dispersion by the interstellar medium and its use for focusing of wide-band signals is quantified in terms of the enhanced channel capacity. It is shown that the enhanced signal-to-noise ratios obtainable with the focused wide-band signals effectively compensate for the time search problem (equivalent to the frequency search problem for narrow-band signals).
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