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GB9212120D0 - Radar - Google Patents

Radar

Info

Publication number
GB9212120D0
GB9212120D0 GB9212120A GB9212120A GB9212120D0 GB 9212120 D0 GB9212120 D0 GB 9212120D0 GB 9212120 A GB9212120 A GB 9212120A GB 9212120 A GB9212120 A GB 9212120A GB 9212120 D0 GB9212120 D0 GB 9212120D0
Authority
GB
United Kingdom
Prior art keywords
fft
outputs
estimate
transform
inverse
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
GB9212120A
Other versions
GB2504252A (en
GB2504252B (en
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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom Ltd
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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Priority to GB9212120A priority Critical patent/GB2504252B/en
Publication of GB9212120D0 publication Critical patent/GB9212120D0/en
Anticipated expiration legal-status Critical
Publication of GB2504252A publication Critical patent/GB2504252A/en
Application granted granted Critical
Publication of GB2504252B publication Critical patent/GB2504252B/en
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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/28—Details of pulse systems
    • G01S7/285—Receivers
    • G01S7/292—Extracting wanted echo-signals
    • 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
    • G01S13/50—Systems of measurement based on relative movement of target
    • G01S13/52—Discriminating between fixed and moving objects or between objects moving at different speeds
    • 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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/36—Means for anti-jamming, e.g. ECCM, i.e. electronic counter-counter measures

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)

Abstract

A method of restoring the performance of a radar Doppler filter which has been seriously degraded by sample exclusion, e.g. due to noise corruption, including the steps of performing a first Fast Fourier Transform (FFT) 10 on the available samples, selecting from the FFT outputs a limited number of those outputs which relate to the lowest frequencies in the transform, performing an inverse FFT 18 on the selected outputs from the FFT, deriving from inverse FFT outputs an estimate of the clutter component, weighting this estimate 20, subtracting 14 the weighted estimate from the original data and then re-applying the modified data to the FFT.
GB9212120A 1992-06-08 1992-06-08 Radar Expired - Fee Related GB2504252B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9212120A GB2504252B (en) 1992-06-08 1992-06-08 Radar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9212120A GB2504252B (en) 1992-06-08 1992-06-08 Radar

Publications (3)

Publication Number Publication Date
GB9212120D0 true GB9212120D0 (en) 2010-11-10
GB2504252A GB2504252A (en) 2014-01-29
GB2504252B GB2504252B (en) 2014-07-23

Family

ID=43127833

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9212120A Expired - Fee Related GB2504252B (en) 1992-06-08 1992-06-08 Radar

Country Status (1)

Country Link
GB (1) GB2504252B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8816899B2 (en) * 2012-01-26 2014-08-26 Raytheon Company Enhanced target detection using dispersive vs non-dispersive scatterer signal processing
US11754706B2 (en) 2020-09-17 2023-09-12 Rockwell Collins, Inc. Agile antenna taper based on weather radar feedback
US11835648B2 (en) 2021-03-24 2023-12-05 Rockwell Collins, Inc. Multi-beam multi-function AESA system
US11953617B2 (en) 2021-03-24 2024-04-09 Rockwell Collins, Inc. Multi-panel multi-function AESA system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2752338C2 (en) * 1977-11-23 1983-11-17 Siemens AG, 1000 Berlin und 8000 München Radar receiver
US4679048A (en) * 1985-04-25 1987-07-07 Grumman Aerospace Corporation Adaptive spread spectrum radar
GB2260049B (en) * 1990-08-08 1994-06-08 Thorn Emi Electronics Ltd Improvements in or relating to receivers

Also Published As

Publication number Publication date
GB2504252A (en) 2014-01-29
GB2504252B (en) 2014-07-23

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Legal Events

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

Effective date: 20141023