Open AccessDiscrimination Between Broadband Underwater Target Echo and Reverberation Based on Signal Spectral Flatness Feature
Author(s) -
Chen Yunfei,
Li Sheng,
Jia Bing,
Zhang Yang,
Wang Zhenshan,
Li Guijuan
Publication year - 2019
Publication title -
chinese journal of electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.267
H-Index - 25
eISSN - 2075-5597
pISSN - 1022-4653
DOI - 10.1049/cje.2019.03.018
Subject(s) - reverberation , broadband , echo (communications protocol) , flatness (cosmology) , underwater , acoustics , feature (linguistics) , signal (programming language) , computer science , speech recognition , physics , geology , telecommunications , computer network , oceanography , cosmology , quantum mechanics , programming language , linguistics , philosophy
Reverberation is the major interference of active detection, discrimination between target echo and reverberation is difficult when the reverberation is very strong. For the distinguishing of underwater target echo with strong interference, the modulation feature of echo and reverberation spectrum are characterized by signal spectral flatness measure, and the relationship between signal spectral flatness and target physical properties are theoretically formed. A method of discrimination between broadband underwater target echo and reverberation that based on signal spectral flatness characteristics difference is proposed and studied. Sea experiment results of complex underwater target broadband acoustic scattering have shown that signal spectral flatness characteristics of underwater target broadband echo and reverberation have obvious differences. Target echo and reverberation can be well distinguished using the proposed method.