Extraction and Analysis of Fine Spectrum Features of Underwater Objects

Yang, Yang; Chengzhen, Zhang; Ding, Yuanming

doi:10.1109/cac51589.2020.9327047

Cited by 1 publication

(1 citation statement)

References 3 publications

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“…Because the human auditory system has great advantages in listening to sound and objects, the human auditory model is constructed by using Gammatone filter to extract auditory time-frequency features and auditory spectrum features, discuss the separability of active sonar buried target echo and seabed reverberation under these features, and select features with good separation to construct feature space, The radial basis function kernel support vector machine is used for classification and recognition. We draw the following test conclusions: the characteristics of the two kinds of signals have good clustering and can obtain high recognition accuracy, which shows that this method can effectively distinguish target echo and reverberation 6,10 .…”

Section: Extraction Of Auditory Time-frequency Features and Auditory ...mentioning

confidence: 86%

Overview of underwater target feature extraction methods

li¹,

hou²,

wang³

et al. 2022

6th International Conference on Mechatronics and Intelligent Robotics (ICMIR2022)

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Target of underwater environments classification and distinguish using active sonar is very complex signal processing work, therefore, many research institutions in the world study the classification and recognition methods of underwater small targets using active sonar.The recognition methods of static underwater small targets can be roughly divided into imaging method and echo method. The imaging method is based on high-frequency narrow beam to obtain the acoustic image of the target and its shadow while suppressing the reverberation interference, so as to realize the classification and recognition of the target. Imaging sonar has high working frequency, limited sonar range, and can not effectively identify false targets with similar geometry. Bright spot model and resonance scattering theory are important theoretical basis of target echo method. The two theories agree that the echo is the result of the interaction between the incident signal and the underwater target, which must contain the characteristics of the target, so it is feasible to detect the target by analyzing the characteristics of the echo signal. However, in the actual underwater target detection process, due to the weak target echo signal, complex seabed environment and target geometry, uncertain sound propagation conditions and so on, the target recognition based on echo method still has great challenges 1,11, .

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Section: Extraction Of Auditory Time-frequency Features and Auditory ...mentioning

confidence: 86%