Coherent Path Beamformer Front End for High Performance Acoustic Modems
Abstract
Our long term goal is to develop an adaptive beamformer "front-end" that can be used with equalization modems to provide high data rate performance (>200 k baud) suitable for transmission of video information from AUV's. As a second but equally important long term goal, based on experimental data, we will contribute to a better understanding of environmental acoustics related to information transmission underwater. We will use this knowledge to develop a test model for evaluating underwater acoustic modem and other shallow water sonar system performance. In consort with this goal, will develop a low cost reliable single channel modem for AUV applications. Our Scientific objectives in this effort are to conduct at-sea acoustic transmission experiments at frequencies of 50 kHz and 25 kHz using a 64 element vertical receiver array and a 32 by 32 Mills Cross array to measure and characterize the underwater acoustic channel. We are using this experimental data to evaluate the performance of the Coherent Path Beamformer under various environmental conditions and to compare the CPB to equalization methods. These results are being used to develop a low cost, high speed beamformer modem for use with AUV's.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 1998
- Accession Number
- ADA569316
Entities
People
- Lester R. Leblanc
Organizations
- Florida Atlantic University