Accession Number:

ADD020221

Title:

System for Undersea Digital Acoustic Communications

Descriptive Note:

Patent Application, Filed 11 Jul 2005

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s):

Report Date:

2005-07-11

Pagination or Media Count:

29.0

Abstract:

An undersea communications system in which a message is converted to a redundant fixed-length data packet and transmitted acoustically as a quadrature phase-keyed signal In a frequency band with a continuous pilot signal at a frequency closely adjacent to the frequency band. A receiver uses the received continuous pilot signal to Doppler compensate the incoming quadrature phase keyed signal by estimating any Doppler distortion in the received pilot signal. The resultant redundant signals are then robustly processed coherently and jointly by the adaptive decision feedback equalizer and decoder to provide the original transmitted data.

Subject Categories:

  • Acoustics
  • Non-Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE