Multi-channel, covert, non-line-of-sight UV communication

Details Multi-channel, covert, non-line-of-sight UV communication Multi-channel, covert, non-line-of-sight UV communication

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994navy.reptr....g&link_type=abstract

Patent Department of the Navy, Washington, DC.

Other

Mercury Isotopes, Multichannel Communication, Ultraviolet Radiation, Ultraviolet Spectra, Frequencies, Line Of Sight, Luminaires, Patents

Scientific paper

A system enables omnidirectional non-line-of-sight simultaneous communications in a number of frequency separated channels in the ultraviolet spectrum. A plurality of discharge lamps each has at least a single different isotope of mercury for each omnidirectionally radiating a discrete line in the ultraviolet spectrum. Each of the discrete lines in the ultraviolet spectrum is modulated by an on-off sequence generator so that modulated discrete lines transmit communications to a number of receivers randomly disposed in a non-line-of-sight relationship to the discharge lamps. Absorption filters at each receiver contain a quenching gas and all the other isotopes of mercury except the one which generated the modulated discrete line of interest.

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