Accession Number : ADD007867

Title :   Surface Acoustic Signal Defader.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Medwin,Herman

Report Date : 26 Aug 1980

Pagination or Media Count : 7

Abstract : A surface acoustic signal defader for optimizing the signal received from underwater sound scattered from the ocean surface. The bandwidth of the underwater sound source is monitored and the frequency of maximum signal strength frequency fades a predetermined amount, reception is switched to the signal of maximum anti-correlation. This process is continuous such that when the new frequency fades the anti-correlation process will determine the optimum frequency for the new fading condition, thus resulting in optimum reception of surface scattered underwater sound.

Descriptors :   *Patents, *Signal processing, *Receivers, *Acoustic signals, Reception, Underwater sound, Optimization, Inventions, Processing, Monitors, Ocean surface, Frequency, Acoustic scattering, Sound generators, Fading(Electromagnetic waves)

Subject Categories : Electrical and Electronic Equipment
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE