Effects of Acoustic Multipath Interactions on Source Range and Bearing Estimation for a Focused Line Array
Abstract
A computer simulation technique was developed to investigate the effects of acoustic multipath interactions on source range and bearing estimation for a focused line array. To simulate the multipath environment, the Generic Sonar Model (Weinberg, NUSC TD 5971, 19 December 1981) was used to modify source signals and emulate oceanic transmissions to individual sensors. Characteristics of a narrowband frequency domain focused beamformer were implemented incorporating wavefront curvature techniques and a maximum- likelihood estimator. Simulations for sparsely populated colinear arrays were conducted at several frequencies for differing sound speed profiles, bottom loss conditions, and source/receiver configurations. The beamformer output was used to obtain relative array pressure response and analyzed to obtain source range and bearing estimation errors. For a given environmental case the results indicate no bearing and relatively small range errors for a source located at broadside for the simulated range and frequency parameters.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 24, 1985
- Accession Number
- ADA172911
Entities
People
- Joseph M. Monti
- Paul D. Koenigs
Organizations
- Naval Underwater Systems Center