Performance Comparison of Arrays of Directional Versus Omnidirectional Sensor’s using Base ’04 Data

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Authors
  1. Theriault, J.A.
  2. Hood, J.
  3. Hazen, D.G.
  4. Beslin, O.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN)
Abstract
Traditional passive-sonar towed-array receivers use a linear set of omnidirectional hydrophones. Beamforming a linear array achieves a reduction in effective background noise and allows the localization of targets within a directional beam. By replacing the omnidirectional hydrophone sensors with “left-right” discerning directional sensors, beamforming can be undertaken with sets of “left” and “right”discerning beams. For an active sonar, this means that targets can be localized without the classic left-right ambiguity. Furthermore, this left-right bearing discrimination has the benefit of reducing reverberation levels. The improvement in sonar performance in a homogenous reverberation environment is significant. In an inhomogeneous reverberation environment where capability may be severely limited by clutter of geological origin, it is even more dramatic. Data collected with the DRDC Atlantic DASM (Directional Acoustic Sensor Module) receive array during the BASE 04 (Broadband Active Sonar Enhancement 2004) sea trial serves to demonstrate the improvement in performance that is achievable with such an array.

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Keywords
Reverberation;Active Sonar;Towed Array
Report Number
DRDC-ATLANTIC-SL-2005-227 — Scientific Literature
Date of publication
12 Jul 2006
Number of Pages
6
DSTKIM No
CA027450
CANDIS No
525555
Format(s):
Electronic Document(PDF)

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