JPS56124070A - Signal forming device - Google Patents

Signal forming device

Info

Publication number
JPS56124070A
JPS56124070A JP2770780A JP2770780A JPS56124070A JP S56124070 A JPS56124070 A JP S56124070A JP 2770780 A JP2770780 A JP 2770780A JP 2770780 A JP2770780 A JP 2770780A JP S56124070 A JPS56124070 A JP S56124070A
Authority
JP
Japan
Prior art keywords
code
barker code
bit
radar
duty ratio
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
JP2770780A
Other languages
Japanese (ja)
Other versions
JPS6247261B2 (en
Inventor
Michihiro Sawada
Akira Okamoto
Masaaki Yasui
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.)
Mitsubishi Electric Corp
Technical Research and Development Institute of Japan Defence Agency
Original Assignee
Mitsubishi Electric Corp
Technical Research and Development Institute of Japan Defence Agency
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 Mitsubishi Electric Corp, Technical Research and Development Institute of Japan Defence Agency filed Critical Mitsubishi Electric Corp
Priority to JP2770780A priority Critical patent/JPS56124070A/en
Publication of JPS56124070A publication Critical patent/JPS56124070A/en
Publication of JPS6247261B2 publication Critical patent/JPS6247261B2/ja
Granted 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
    • G01S13/02—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
    • G01S13/284—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 using coded pulses
    • G01S13/288—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 using coded pulses phase modulated

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

PURPOSE:To provide a response signal of high-duty ratio as high compression gain against a barker code-used system for a radar, etc. by forming a synthesized signal with a barker code deviated by a prearranged bit. CONSTITUTION:If a 5-bit barker code 100 is processed by mans of a delay circuit 121 to 124, a positive polarity converter 131, 133 to 135, a negative polarity converter 132, etc., the code 100 is compressed by means of a synthesizer 140 to an amplitude five times as much as the original code. In addition, if this compressed code is synthesized deviated by two bits, the duty ratio of an output wave form is high such as 50%, etc. Consequently, in an enermy and friend response system using a barker code under a two-dimensional radar, etc., the number of barker code bits of a target radar is analyzed, generating a barker code from a carrier generation circuit 200 in accordance with said bit number. Then the bit number in accordance with a barker code bit number is controlled at a modulator 201 by means of a modulation control circuit 202. As a result, it is possible to transmit to a target radar a response signal at high compression ratio and high duty ratio.
JP2770780A 1980-03-05 1980-03-05 Signal forming device Granted JPS56124070A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2770780A JPS56124070A (en) 1980-03-05 1980-03-05 Signal forming device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2770780A JPS56124070A (en) 1980-03-05 1980-03-05 Signal forming device

Publications (2)

Publication Number Publication Date
JPS56124070A true JPS56124070A (en) 1981-09-29
JPS6247261B2 JPS6247261B2 (en) 1987-10-07

Family

ID=12228458

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2770780A Granted JPS56124070A (en) 1980-03-05 1980-03-05 Signal forming device

Country Status (1)

Country Link
JP (1) JPS56124070A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6355187U (en) * 1986-09-30 1988-04-13
JP2005321359A (en) * 2004-05-11 2005-11-17 Mitsubishi Electric Corp Code modulation pulse compression system and code modulation pulse compression method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6355187U (en) * 1986-09-30 1988-04-13
JP2005321359A (en) * 2004-05-11 2005-11-17 Mitsubishi Electric Corp Code modulation pulse compression system and code modulation pulse compression method
JP4549730B2 (en) * 2004-05-11 2010-09-22 三菱電機株式会社 Code modulation pulse compression method and code modulation pulse compression method

Also Published As

Publication number Publication date
JPS6247261B2 (en) 1987-10-07

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