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CA2069979A1 - Method of generating a reference function for a pulse compression of frequency; phase and/or amplitude-modulated signals - Google Patents

Method of generating a reference function for a pulse compression of frequency; phase and/or amplitude-modulated signals

Info

Publication number
CA2069979A1
CA2069979A1 CA2069979A CA2069979A CA2069979A1 CA 2069979 A1 CA2069979 A1 CA 2069979A1 CA 2069979 A CA2069979 A CA 2069979A CA 2069979 A CA2069979 A CA 2069979A CA 2069979 A1 CA2069979 A1 CA 2069979A1
Authority
CA
Canada
Prior art keywords
signal
generating
generated
amplitude
frequency
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA2069979A
Other languages
French (fr)
Other versions
CA2069979C (en
Inventor
Alberto Moreira
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Deutsches Zentrum fuer Luft und Raumfahrt eV
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2069979A1 publication Critical patent/CA2069979A1/en
Application granted granted Critical
Publication of CA2069979C publication Critical patent/CA2069979C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
    • G01S13/90—Radar or analogous systems specially adapted for specific applications for mapping or imaging using synthetic aperture techniques, e.g. synthetic aperture radar [SAR] techniques
    • 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
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/08—Systems for measuring distance only
    • G01S13/10—Systems for measuring distance only using transmission of interrupted, pulse modulated waves
    • G01S13/26—Systems for measuring distance only using transmission of interrupted, pulse modulated waves wherein the transmitted pulses use a frequency- or phase-modulated carrier wave
    • G01S13/28—Systems for measuring distance only using transmission of interrupted, pulse modulated waves wherein the transmitted pulses use a frequency- or phase-modulated carrier wave with time compression of received pulses

Landscapes

  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

In a method of generating a reference function for pulse compression of frequency, phase and/or amplitude-modulated signals, a reference signal (ho(t)) corresponding to a conjugated complex function of an error-free frequency-modulated signal (so(t)) and a signal (sf(t)) containing phase and amplitude errors are generated in two following FFT units by a Fourier transformation in the form of signals (Ho, Sf) present at the outputs thereof.
Thereupon, the signal (¦Ho¦2) is generated from the output signal (Ho) of the one FFT unit by means of an intensity-forming unit and the signal (1/Sf) is generated from the output signal (Sf) of the other FFT unit by means of a reciprocal-forming unit and said two signals (¦Ho¦2, 1/Ff) are multiplied together in a following multiplying member;
finally, the output signal (Hi) of the multiplying member is subjected in an IFFT unit to an inverse transformation for generating the reference function (hi(t)) in the time domain.

For performing a pulse compression in the time domain a pulse response (fo(t)) corresponding to the function (sin(x)/x) is then formed from the signal (sf(t)) and the generated reference function (hi(t)) in a convolution unit (3).
CA002069979A 1991-05-31 1992-05-29 Method of generating a reference function for a pulse compression of frequency; phase and/or amplitude-modulated signals Expired - Fee Related CA2069979C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4117849.1 1991-05-31
DE4117849A DE4117849C2 (en) 1991-05-31 1991-05-31 Method for generating a reference function for pulse compression of frequency, phase and / or amplitude modulated signals

Publications (2)

Publication Number Publication Date
CA2069979A1 true CA2069979A1 (en) 1992-12-01
CA2069979C CA2069979C (en) 1996-10-01

Family

ID=6432877

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002069979A Expired - Fee Related CA2069979C (en) 1991-05-31 1992-05-29 Method of generating a reference function for a pulse compression of frequency; phase and/or amplitude-modulated signals

Country Status (3)

Country Link
CA (1) CA2069979C (en)
DE (1) DE4117849C2 (en)
IT (1) IT1259396B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108267723A (en) * 2017-01-04 2018-07-10 南京智慧魔方电子科技有限公司 The offline online amplitude and phase error correction method of continental rise short distance K-band radar
EP3617745A4 (en) * 2017-06-08 2020-06-17 Mitsubishi Electric Corporation Radar device

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4240225C2 (en) * 1991-05-31 1995-09-07 Deutsche Forsch Luft Raumfahrt Method for generating a correction function for eliminating phase and amplitude errors of a compressed signal
US7245250B1 (en) * 2005-08-16 2007-07-17 Itt Manufacturing Enterprises, Inc. Synthetic aperture radar image compression
US10444354B2 (en) 2011-10-26 2019-10-15 Flir Systems, Inc. Sonar data enhancement systems and methods
CN204495995U (en) 2011-10-26 2015-07-22 菲力尔系统公司 Broadband sonar transmitter, broadband sonar and sonar
CN204495996U (en) 2011-10-26 2015-07-22 菲力尔系统公司 broadband sonar receiver

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4379295A (en) * 1981-02-03 1983-04-05 The United States Of America As Represented By The Secretary Of The Navy Low sidelobe pulse compressor
NL8702342A (en) * 1987-10-01 1989-05-01 Hollandse Signaalapparaten Bv FM-CW RADAR DEVICE.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108267723A (en) * 2017-01-04 2018-07-10 南京智慧魔方电子科技有限公司 The offline online amplitude and phase error correction method of continental rise short distance K-band radar
EP3617745A4 (en) * 2017-06-08 2020-06-17 Mitsubishi Electric Corporation Radar device

Also Published As

Publication number Publication date
CA2069979C (en) 1996-10-01
DE4117849C2 (en) 1994-05-05
IT1259396B (en) 1996-03-13
ITTO920465A1 (en) 1993-11-29
DE4117849A1 (en) 1992-12-03
ITTO920465A0 (en) 1992-05-29

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