AN ADAPTIVE PROCESSING STRUCTURE FOR INTEGRATED ACTIVE-PASSIVE SONARS DEPLOYING CYLINDRICAL ARRAYS

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Authors
  1. Dhanantwari, A.C.
  2. Stergiopoulos, S.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
The paper details the development and implementation of an adaptive processing structure for integrated active-passive SONARs deploying cylindrical arrays. The main concept includes decomposition of the computationally intensive multidimensional beamformer into two simple modules, which are line and circular array beamformers. Thus, the multidimensional beamforming process can now be divided into coherent sub-processes which lead to efficient implementation in real-time sonar systems. This new approach makes the implementation of adaptive schemes in multidimensional sensor arrays practically achievable. The proposed adaptive processing concept has been implemented in an integrated active-passive real-time sonar deploying a cylindrical array. Real data results demonstrate the superior performance of the adaptive beamformers over the conventional beamformer in suppressing the reverberation and cluttering effects in active sonar applications. Moreover, for passive sonar applications, the adaptive processing provides substantially improved angular resolution. These performance improvements for cylindrical array SONARs are of particular importance in mine hunting operations.
Keywords
Adaptive processing;Circular arrays;Beam steering
Report Number
DCIEM-98-P-10 — Paper
Date of publication
20 Jun 1998
Number of Pages
4
DSTKIM No
99-00198
CANDIS No
510023
Format(s):
Hardcopy;Document Image stored on Optical Disk

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