Accession Number : ADD010991

Title :   Single-Sideband Acoustic Telemetry.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Gordon,A ; Watson,S J ; Cowen,S J ; Mackelburg,G ; Castile,B D

Report Date : 29 Nov 1983

Pagination or Media Count : 5

Abstract : An apparatus and method of transmitting and receiving information underwater assure improved performance characteristics. Modulating a carrier and appropriately filtering it allows the transmission of only single sideband signals or a carrier along with single sideband signals to increase the range at reduced power consumption levels. Demodulating incoming signals can be done synchronously (when the carrier is present) or asynchronously (only single sideband signals) to extract the information. When a number of carriers are modulated and, simultaneously, are transmitted and received, the system's reliability is enhanced. (Author)

Descriptors :   *Patents, *Telemeter systems, *Single sideband communications, *Underwater communications, Acoustic communications, Signal processing, Electroacoustic transducers, Transmitter receivers, Two way transmission, Power levels, Clocks, Microphones, Local oscillators

Subject Categories : Acoustics
      Telemetry
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE