THE EXTRAPOLATION OF SPATIALLY-LIMITED SIGNALS FOR APPLICATION IN SONAR ARRAY PROCESSING

Authors
  1. El-Masry, E.I.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);Technical Univ of Nova Scotia, Halifax NS (CAN) Dept of Electrical Engineering
Abstract
Line arrays of equally spaced sensors play a major role in detecting and localizing acoustic sources present in the ocean. The effectiveness of a line array is limited by its physical length. As a consequence, for arrays of limited length, system performance is degraded at low frequencies. The report presents the results of an analytical and experimental study of a signal extrapolation algorithm, which is used in order to improve the beamformer's performance. Conceptually, in the spatial domain, the limited array length is considered in the same manner as a finite segment of data in the time domain. The extrapolation procedure is derived for low-pass and bandpass data, in the spatial domain, and is then combined with the beamforming concept to achieve improved resolution.
Report Number
DREA-CR-87-426 — Contractor Report
Date of publication
15 Apr 1987
Number of Pages
68
DSTKIM No
87-02526
CANDIS No
51337
Format(s):
Hardcopy;Originator's fiche received by DSIS

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