GB1445572A - Code signal receiver circuits - Google Patents
Code signal receiver circuitsInfo
- 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
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.
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)
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 |
-
1972
- 1972-12-06 GB GB5632272A patent/GB1445572A/en not_active Expired
Cited By (4)
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 |