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{{Three other uses|underwater acoustic signal procesing|other uses|Sonar}}
{{Multiple issues|
No matter the [[active sonar]] or [[passive sonar]], when receiving the acoustic signal reflected from the target, the information included in the signal can not be directly collected and used without technical [[signal processing]]. To extract the efficient and useful informations from the mixed signal, some steps should be taken to transfer sonar data from raw acoustic data reception to detection output. Thus, for the active sonar, six steps are needed during the signal processing system.
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