IMPLEMENTATION OF ADAPTIVE AND SYNTHETIC-APERTURE PROCESSING SCHEMES IN INTEGRATED ACTIVE-PASSIVE SONAR SYSTEMS

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Authors
  1. Stergiopoulos, S.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
Progress in the implementation of state-of-the-art signal-processing schemes in sonar systems is limited mainly by the moderate advancements made in sonar computing architectures and the lack of operational evaluation of the advanced processing schemes. Until recently, matrix-based processing techniques, such as adaptive and synthetic-aperture processing, could not be efficiently implemented in the current type of sonar systems, even though it is widely believed that they have advantages that can address the requirements associated with the difficult operaitonal problems that next-generation sonars will have to solve. Interestingly, adaptive and synthetic-aperture techniques may be viewed by other disciplines as conventional schemes. For the sonar technology discipline, however, they are considered as advanced schemes because of the very limited progress that has been made in their implementation in sonar systems. This paper is intended to address isues of implementation of advanced processing schemes in sonar systems and also to serve as a brief overview to the principles and applications of advanced sonar signal processing. The main development reported in this paper deals with the definition of a generic beam-forming structure that allows the implementation of nonconventional signal-processing techniques in integrated active-passive sonar systems. TRUNCATED
Keywords
Beam steering;Covariance matrices;Delay estimation;FIR digital filters;Fourier transforms;Frequency domain analysis;Frequency estimation;Maximum Likelihood Estimation (MLE)
Report Number
DCIEM-97-P-44 — Reprint
Date of publication
01 Feb 1998
Number of Pages
40
Reprinted from
Proceedings of the IEEE, vol 86, no 2, 1998, p 361-396
DSTKIM No
99-00194
CANDIS No
510020
Format(s):
Hardcopy;Document Image stored on Optical Disk

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