Accession Number:

ADA574796

Title:

Ocean Variability Effects on Underwater Acoustic Communications

Descriptive Note:

Annual rept.

Corporate Author:

DELAWARE UNIV NEWARK COLL OF MARINE AND EARTH STUDIES

Personal Author(s):

Report Date:

2012-09-30

Pagination or Media Count:

7.0

Abstract:

This proposed research seeks to identify, explain, and ultimately predict, the factors that significantly alter the operational effectiveness of underwater acoustic communications through experimental work and theoretical analysis. The long-term goal is to develop reliable, high rate transceivers customized for coherent underwater acoustic communications. The research objective is to investigate the relationship between environmental fluctuations and the performance of coherent underwater acoustic communications at high frequencies 8-50 kHz through experimental research and data analysis. High rate communication methods are to be developed based on the understanding of acoustic propagation physics in dynamic shallow water environments. The acoustic channel is regarded as one of the most challenging environments for data communication. Often cited difficulties include extended multipath, fast temporal fluctuations, and large Doppler spread 1. These characteristics are challenging not only to receiver design, but also to channel modeling efforts. During the past year, we have dealt with both aspects, communication receiver design for high data rates and channel modeling for predicting modem performance in the dynamic ocean environment, based on our experimental data collected in shallow water regions in Kauai Island, HI.

Subject Categories:

  • Hydrology, Limnology and Potamology
  • Acoustics
  • Non-Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE