Title
Wideband Synthetic Aperture Sonar Backprojection with Maximization of Wave Number Domain Support
Author
Synnes, S.A.V.
Hunter, A.J.
Hansen, R.E.
Sabo, T.O.
Callow, H.J.
van Vossen, R.
Austeng, A.
Publication year
2017
Abstract
Wideband and widebeam synthetic aperture sonar (SAS) can provide information on the frequency- and aspect dependent scattering in a scene. We suggest an approach to predict the quality of the sensor data over the available frequencies and aspect angles. We relate the typical spatial domain quality metrics to their wave number domain (WD) counterpart, and use these to map the data quality in WD. Because SAS arrays often are undersampled along-track, we pay particular attention to data degradation from aliasing. We use the proposed approach to examine how three SAS image formation algorithms based on time domain backprojection (TDBP) access data of different quality from wideband SAS systems. We illustrate the results with predictions for a generic SAS design and demonstrate the findings on two experimental systems. We observe that the maximum support of high-quality data is achieved through BP onto a high-resolution grid followed by WD filtering.
Subject
Along-track ambiguity
backprojection (BP) algorithm
grating lobes
synthetic aperture sonar (SAS)
wideband sonar
Sonar
Synthetic apertures
Data degradation
Dependent scatterings
Experimental system
High quality data
High-resolution grids
Quality metrics
Wave number domain
Synthetic aperture sonar
TS - Technical Sciences
AS - Acoustics & Sonar
Observation, Weapon & Protection Systems
To reference this document use:
http://resolver.tudelft.nl/uuid:881ee093-8c69-456f-9087-2334d00418f7
TNO identifier
954830
Publisher
Institute of Electrical and Electronics Engineers Inc.
ISSN
0364-9059
Source
IEEE Journal of Oceanic Engineering, 42 (42), 880-891
Document type
article