IL179946A0 - Method for detecting targets - Google Patents

Method for detecting targets

Info

Publication number
IL179946A0
IL179946A0 IL179946A IL17994606A IL179946A0 IL 179946 A0 IL179946 A0 IL 179946A0 IL 179946 A IL179946 A IL 179946A IL 17994606 A IL17994606 A IL 17994606A IL 179946 A0 IL179946 A0 IL 179946A0
Authority
IL
Israel
Prior art keywords
signals
entropy
targets
reception
linear transformation
Prior art date
Application number
IL179946A
Original Assignee
Atlas Elektronik Gmbh
Dirk Neumeister Bremen De
Jorg Hurka Oldenburg De
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Atlas Elektronik Gmbh, Dirk Neumeister Bremen De, Jorg Hurka Oldenburg De filed Critical Atlas Elektronik Gmbh
Publication of IL179946A0 publication Critical patent/IL179946A0/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B11/00—Transmission systems employing sonic, ultrasonic or infrasonic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/88—Sonar systems specially adapted for specific applications
    • G01S15/89—Sonar systems specially adapted for specific applications for mapping or imaging
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/66—Sonar tracking systems
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
    • G06F17/10—Complex mathematical operations
    • G06F17/14—Fourier, Walsh or analogous domain transformations, e.g. Laplace, Hilbert, Karhunen-Loeve, transforms
    • G06F17/141—Discrete Fourier transforms

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Remote Sensing (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Mathematical Physics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mathematical Analysis (AREA)
  • Computational Mathematics (AREA)
  • Pure & Applied Mathematics (AREA)
  • Data Mining & Analysis (AREA)
  • Signal Processing (AREA)
  • Mathematical Optimization (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Software Systems (AREA)
  • Databases & Information Systems (AREA)
  • Algebra (AREA)
  • Discrete Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

The invention relates to a method for detecting targets emitting wavelength energy into a medium by means of entropy determination at time segments of electric reception signals of a receiver which is arranged in the medium remote from said target. In order to detect targets which emit particularly broad-band noisy low-energy signals, the time segments of the reception signals undergo linear transformation and the entropy of the reception of the transformed signals is determined and it is possible to infer upon said targets on the basis of modification of entropy in the transformed signals. Fourier analysis and/or wavelet analysis of the reception signals is carried out for linear transformation.
IL179946A 2004-06-17 2006-12-10 Method for detecting targets IL179946A0 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004029368A DE102004029368A1 (en) 2004-06-17 2004-06-17 Method for detecting targets
PCT/EP2005/004440 WO2005125064A1 (en) 2004-06-17 2005-04-26 Method for detecting targets

Publications (1)

Publication Number Publication Date
IL179946A0 true IL179946A0 (en) 2007-05-15

Family

ID=34965153

Family Applications (1)

Application Number Title Priority Date Filing Date
IL179946A IL179946A0 (en) 2004-06-17 2006-12-10 Method for detecting targets

Country Status (8)

Country Link
EP (1) EP1756983B1 (en)
KR (1) KR101099965B1 (en)
AT (1) ATE515843T1 (en)
AU (1) AU2005255537B2 (en)
DE (1) DE102004029368A1 (en)
IL (1) IL179946A0 (en)
NO (1) NO20070285L (en)
WO (1) WO2005125064A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101382259B1 (en) * 2011-05-20 2014-04-08 삼성탈레스 주식회사 Apparatus and method for detecting transition noise using strength of signal and spectrum property
CN110187340B (en) * 2019-06-17 2021-08-17 中国电子科技集团公司信息科学研究院 Entropy-based detection target information characterization method and system
CN110865375B (en) * 2019-11-13 2022-07-05 西北工业大学 Underwater target detection method
CN117250603B (en) * 2023-11-10 2024-01-09 西北工业大学深圳研究院 Multichannel entropy detection method for underwater weak target signal

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5181254A (en) * 1990-12-14 1993-01-19 Westinghouse Electric Corp. Method for automatically identifying targets in sonar images
US5247302A (en) * 1992-06-30 1993-09-21 Iowa State University Research Foundation, Inc. Entropy-based signal receiver
US5392046A (en) * 1993-08-19 1995-02-21 Mallinckrodt Medical, Inc. Entropy based signal, transmission, reception and signal analysis method and apparatus
US5377163A (en) * 1993-11-01 1994-12-27 Simpson; Patrick K. Active broadband acoustic method and apparatus for identifying aquatic life
US5668778A (en) * 1996-07-09 1997-09-16 The United States Of America As Represented By The Secretary Of The Navy Method for detecting acoustic signals from an underwater source
US6397679B1 (en) * 2000-03-30 2002-06-04 Simmonds Precision Products, Inc. Method and apparatus for discriminating ultrasonic echoes using wavelet function processing
JP2003232820A (en) * 2002-02-13 2003-08-22 Oki Electric Ind Co Ltd Frequency analytical method by maximum entropy method

Also Published As

Publication number Publication date
EP1756983B1 (en) 2011-07-06
KR20070031941A (en) 2007-03-20
AU2005255537A1 (en) 2005-12-29
DE102004029368A1 (en) 2006-01-26
EP1756983A1 (en) 2007-02-28
NO20070285L (en) 2007-01-16
WO2005125064A1 (en) 2005-12-29
ATE515843T1 (en) 2011-07-15
AU2005255537B2 (en) 2010-03-04
KR101099965B1 (en) 2011-12-28

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