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http://dx.doi.org/10.7776/ASK.2019.38.3.290

Target detection method of the narrow-band continuous-wave active sonar based on basis-group beamspace-domain nonnegative matrix factorization for a reverberant environment  

Lee, Seokjin (School of Electronics Engineering, Kyungpook National University)
Abstract
The proposed algorithm deals with a detection problem of target echo for narrow-band continuous-wave active sonar in the underwater environment in this paper. In the active sonar systems, ping signal emitted for target detection produces a signal that consists of multiple reflections by many scatterers around, which is called reverberation. The proposed algorithm aims to detect the low-Doppler target echo in the reverberant environment. The proposed algorithm estimates the bearing, frequency, and temporal bases based on beamspace-domain multichannel nonnegative matrix factorization. In particular, the bases are divided into two basis groups - the reverberation group and the echo group, then the basis groups are estimated independently. In order to evaluate the proposed algorithm, a simulation with synthesized reverberation was performed. The results show that the proposed algorithm has enhanced performance than the conventional algorithms.
Keywords
Active sonar; Target detection; Reverberation; Continuous-wave; Multichannel nonnegative matrix factorization;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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