GB1322848A - Electric pulse transmission systems - Google Patents

Electric pulse transmission systems

Info

Publication number
GB1322848A
GB1322848A GB5101171A GB5101171A GB1322848A GB 1322848 A GB1322848 A GB 1322848A GB 5101171 A GB5101171 A GB 5101171A GB 5101171 A GB5101171 A GB 5101171A GB 1322848 A GB1322848 A GB 1322848A
Authority
GB
United Kingdom
Prior art keywords
signal
frequency
local oscillator
transmitter
compression
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
GB5101171A
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of GB1322848A publication Critical patent/GB1322848A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/38—Transmitter circuitry for the transmission of television signals according to analogue transmission standards
    • 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
    • G01S13/282—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 a frequency modulated carrier wave

Landscapes

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

Abstract

1322848 Pulse compression radar SIEMENS AG 3 Nov 1971 [9 Nov 1970] 51011/71 Heading H4D A pulse compression system in which received signals are heterodyned with a locally generated signal whose frequency is modulated according to a predetermined time function before being fed to a frequency dependent delay device. In a radar system transmitted pulses having a frequency-time characteristic 10 are reflected from a target and received as signals 11. These are mixed with a local oscillator signal 12 giving a resultant signal 13. The modulation gradient of signal 13 is independent of the time of reception being the sum or difference of the transmitter and local oscillator gradients (depending on whether the sum or difference frequency mixed signals are utilized). The compression device is thus designed to produce a satisfactory compression for the predetermined frequency spread of signal 13. However the centre frequency of signal 13 depends on its time of arrival and thus the average delay of the compression device is range dependent. This necessitates some compensation in any display device but may be used to separate overlapping pulses. The local oscillator signal may undergo several cycles during each transmitter period and the modulation of the transmitter and local oscillator may be changed during successive periods whilst retaining the same resultant modulation gradient. The modulations may not be linear but their resultant is preferably linear (Fig. 5, not shown).
GB5101171A 1970-11-09 1971-11-03 Electric pulse transmission systems Expired GB1322848A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702054985 DE2054985A1 (en) 1970-11-09 1970-11-09 Electrical transmission system, consisting of a transmitter and a receiver

Publications (1)

Publication Number Publication Date
GB1322848A true GB1322848A (en) 1973-07-11

Family

ID=5787532

Family Applications (2)

Application Number Title Priority Date Filing Date
GB145957A Expired GB821880A (en) 1970-11-09 1957-01-15 Improvements relating to apparatus for in which timing information is conveyed by electrical signals
GB5101171A Expired GB1322848A (en) 1970-11-09 1971-11-03 Electric pulse transmission systems

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB145957A Expired GB821880A (en) 1970-11-09 1957-01-15 Improvements relating to apparatus for in which timing information is conveyed by electrical signals

Country Status (7)

Country Link
BE (1) BE774710A (en)
CH (1) CH528187A (en)
DE (1) DE2054985A1 (en)
FR (1) FR2112538B1 (en)
GB (2) GB821880A (en)
IT (1) IT940454B (en)
NL (1) NL7115399A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2196810A (en) * 1986-08-20 1988-05-05 Marconi Co Ltd Radar receiver
US8390506B2 (en) 2007-09-12 2013-03-05 Robert Bosch Gmbh Motor vehicle FMCW radar having linear frequency ramps of different slopes that are set apart, which are associated with different angular ranges

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL264489A (en) * 1960-05-11
DE1272397B (en) * 1961-05-05 1968-07-11 Gen Electric Radar system with pulse stretching and compression
DE1202356B (en) * 1961-07-22 1965-10-07 Gen Electric Radar method
FR2394814A1 (en) * 1977-06-16 1979-01-12 Telecommunications Sa DEVICE FOR REMOVING VERY CLOSE PARASITIC ECHOES IN OPTICAL PULSE COMPRESSION RADARS

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2196810A (en) * 1986-08-20 1988-05-05 Marconi Co Ltd Radar receiver
US8390506B2 (en) 2007-09-12 2013-03-05 Robert Bosch Gmbh Motor vehicle FMCW radar having linear frequency ramps of different slopes that are set apart, which are associated with different angular ranges

Also Published As

Publication number Publication date
BE774710A (en) 1972-02-14
IT940454B (en) 1973-02-10
GB821880A (en) 1959-10-14
NL7115399A (en) 1972-05-12
FR2112538A1 (en) 1972-06-16
CH528187A (en) 1972-09-15
FR2112538B1 (en) 1977-01-28
DE2054985A1 (en) 1972-05-10

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Legal Events

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