Coherent Path Beamformer for High Performance Modems
Abstract
LONG-TERM GOALS. Our long term goal is to develop an adaptive beamformer "front-end" that can be used with most commercial 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 under water 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. OBJECTIVES. Our Scientific objectives in this effort are to conduct at-sea acoustic transmission experiments at frequencies of 240 kHz, 100 kHz, 50 kHz, and 25 kHz using large (64 elements) vertical acoustic receiver arrays 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 diversity methods. These results are being used to develop a low cost single channel modem and an optimal hardware/software CPB system to be constructed and tested at-sea on AUV's.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 1997
- Accession Number
- ADA634264
Entities
People
- Lester R. Leblanc
Organizations
- Florida Atlantic University