GB1445572A - Code signal receiver circuits - Google Patents

Code signal receiver circuits

Info

Publication number
GB1445572A
GB1445572A GB5632272A GB5632272A GB1445572A GB 1445572 A GB1445572 A GB 1445572A GB 5632272 A GB5632272 A GB 5632272A GB 5632272 A GB5632272 A GB 5632272A GB 1445572 A GB1445572 A GB 1445572A
Authority
GB
United Kingdom
Prior art keywords
phase
mixer
delay
output
fuze
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.)
Expired
Application number
GB5632272A
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.)
UK Secretary of State for Defence
Original Assignee
UK Secretary of State for Defence
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 UK Secretary of State for Defence filed Critical UK Secretary of State for Defence
Priority to GB5632272A priority Critical patent/GB1445572A/en
Publication of GB1445572A publication Critical patent/GB1445572A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation
    • H04L27/2331—Demodulator circuits; Receiver circuits using non-coherent demodulation wherein the received signal is demodulated using one or more delayed versions of itself
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C13/00—Proximity fuzes; Fuzes for remote detonation
    • F42C13/04—Proximity fuzes; Fuzes for remote detonation operated by radio waves
    • F42C13/042—Proximity fuzes; Fuzes for remote detonation operated by radio waves based on distance determination by coded radar 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
    • 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
    • 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
    • G01S13/30—Systems for measuring distance only using transmission of interrupted, pulse modulated waves using more than one pulse per radar period

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

1445572 Radar proximity fuze DEFENCE SECRETARY OF STATE FOR 22 Nov 1973 [6 Dec 1972] 56322/72 Heading F3A [Also in Division H4] A receiver for detecting signals which are phase-modulated according to a digital code sequence includes a decoder for applying a sequence of phase shifts, complementary to those given by the code sequence, to received signals. As applied to a radar proximity fuze, the same code generator is utilized for the transmitter and the decoder, a suitable delay in the line to the latter affording detection at a particular range. A bi-phase code as in Specification 1,432,541 is used in the embodiments. In one embodiment a bi-phase code generator 3 feeds a microwave transmitter and, via rangedelay 6, to a balanced mixer 2, with a target at the range corresponding to delay 6 the output of the mixer is a series of pulses of constant phase at ZF. A one-bit delay 7 is introduced into one path from the mixer to a phase-detector 6. If the inputs thereto are in phase the output is a D.C. voltage of one polarity and are applied to an integrator 9, and thence to a low-pass filter 10 (for rejecting out-of-range target signals) and a threshold circuit 11 to trigger a fuze. An alternative embodiment utilizes surface-wave delay lines between the output of mixer 2 and the upper junction of mixer 2 and delay 7, Fig. 2 (not shown), and is useful when the wanted signal is buried in noise.
GB5632272A 1972-12-06 1972-12-06 Code signal receiver circuits Expired GB1445572A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5632272A GB1445572A (en) 1972-12-06 1972-12-06 Code signal receiver circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5632272A GB1445572A (en) 1972-12-06 1972-12-06 Code signal receiver circuits

Publications (1)

Publication Number Publication Date
GB1445572A true GB1445572A (en) 1976-08-11

Family

ID=10476337

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5632272A Expired GB1445572A (en) 1972-12-06 1972-12-06 Code signal receiver circuits

Country Status (1)

Country Link
GB (1) GB1445572A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2455288A1 (en) * 1979-04-25 1980-11-21 Materiel Telephonique Military radar with anti-jamming and anti-location circuit - uses phase coded signals with amplitude varied as function of target distance
WO1988004061A1 (en) * 1986-11-17 1988-06-02 Hughes Aircraft Company Method and system for radar compatible data communication
US5115247A (en) * 1988-02-16 1992-05-19 Honeywell Inc. Frequency modulated, phase coded radar
EP1496371A1 (en) * 2003-07-07 2005-01-12 Mitsubishi Electric Information Technology Centre Europe B.V. Generation of packets of waveforms

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2455288A1 (en) * 1979-04-25 1980-11-21 Materiel Telephonique Military radar with anti-jamming and anti-location circuit - uses phase coded signals with amplitude varied as function of target distance
WO1988004061A1 (en) * 1986-11-17 1988-06-02 Hughes Aircraft Company Method and system for radar compatible data communication
US5115247A (en) * 1988-02-16 1992-05-19 Honeywell Inc. Frequency modulated, phase coded radar
EP1496371A1 (en) * 2003-07-07 2005-01-12 Mitsubishi Electric Information Technology Centre Europe B.V. Generation of packets of waveforms

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee