发明名称 |
REVERBERATION FILTER, ACTIVE SONAR DEVICE, REVERBERATION REMOVING METHOD, AND REVERBERATION REMOVING PROGRAM |
摘要 |
<P>PROBLEM TO BE SOLVED: To provide a reverberation filter and the like that can accurately remove reverberation from a reflection wave. <P>SOLUTION: The reverberation filter 10 includes reflection wave detection means 101 for detecting whether a level L of the reflection wave exceeds a level threshold Lth; duration measurement means 102 for measuring a duration T in which the level L of the reflection wave continues to exceed the level threshold Lth when the reflection wave detection means 101 detects that the level L of the reflection wave exceeds the level threshold Lth; and target echo determining means 103 for detecting whether the duration T measured by the duration measurement means 102 exceeds a duration threshold Tth, determines that a reflection wave in which the duration T exceeds the duration threshold Tth is a reverberation, and determines that a reflection wave in which the duration T does not exceed the duration threshold Tth is a target echo. <P>COPYRIGHT: (C)2012,JPO&INPIT |
申请公布号 |
JP2012173224(A) |
申请公布日期 |
2012.09.10 |
申请号 |
JP20110037702 |
申请日期 |
2011.02.23 |
申请人 |
NEC CORP |
发明人 |
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分类号 |
G01S7/527;G01S7/536;G01S15/10 |
主分类号 |
G01S7/527 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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