NO20064593L - Sekundaer dekoding av radiomeldinger. - Google Patents

Sekundaer dekoding av radiomeldinger.

Info

Publication number
NO20064593L
NO20064593L NO20064593A NO20064593A NO20064593L NO 20064593 L NO20064593 L NO 20064593L NO 20064593 A NO20064593 A NO 20064593A NO 20064593 A NO20064593 A NO 20064593A NO 20064593 L NO20064593 L NO 20064593L
Authority
NO
Norway
Prior art keywords
bit
weighting function
sum
amplitude
bit period
Prior art date
Application number
NO20064593A
Other languages
English (en)
Other versions
NO340709B1 (no
Inventor
Martin Stevens
Quenton Jones
Original Assignee
Raytheon Systems 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 Raytheon Systems Ltd filed Critical Raytheon Systems Ltd
Publication of NO20064593L publication Critical patent/NO20064593L/no
Publication of NO340709B1 publication Critical patent/NO340709B1/no

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
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/76—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted
    • G01S13/765—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted with exchange of information between interrogator and responder
    • 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
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/76—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted
    • G01S13/78—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted discriminating between different kinds of targets, e.g. IFF-radar, i.e. identification of friend or foe
    • G01S13/781—Secondary Surveillance Radar [SSR] in general
    • G01S13/782—Secondary Surveillance Radar [SSR] in general using multimoding or selective addressing
    • 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
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/76—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted
    • G01S13/78—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted discriminating between different kinds of targets, e.g. IFF-radar, i.e. identification of friend or foe
    • G01S13/781—Secondary Surveillance Radar [SSR] in general
    • G01S13/784—Coders or decoders therefor; Degarbling systems; Defruiting systems
    • 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
    • G01S7/2813—Means providing a modification of the radiation pattern for cancelling noise, clutter or interfering signals, e.g. side lobe suppression, side lobe blanking, null-steering arrays
    • 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
    • G01S7/2921—Extracting wanted echo-signals based on data belonging to one 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)
  • Radar Systems Or Details Thereof (AREA)
  • Radio Transmission System (AREA)
  • Radio Relay Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Details Of Aerials (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)

Abstract

Fremgangsmåte og anordning for bestemmelse av en verdi for hver bit i et radarrespons-sekundpulstog samplet med en bitrate som er større enn en sampling pr. bit. Det mottatte signal samples gjentatte ganger over en bit-periode. En skalafaktor for en vektingsfunksjon defineres basert på de amplitudenivåer som detekteres fra responsinnledningen. Vektingsfunksjonen har en maksimal positiv verdi ved den forventedebit-amplitude for den første halvdel av bit-perioden og avtar mot null ved høyere amplituder slik at derved virkningen til meget store samplinger vil bli neglisjerbar. For lavere amplituder går vektingen mot null ved terskelnivået og blir økende negativ helt til null-amplitude. I den andre halvdelen av bit-periode veksles fortegnet i vektingsfunksjonen sammenlignet med den første halvdel. Amplitudesamplingene som tas under bit-perioden blir så hver enkelt anvendt i vektingsfunksjonen, og summen av vektingsfunksjonen for samplingene som er tatt i bit-perioden, beregnes. Er summen positiv, så betegnes biten som en "1". Er summen negativ, så betegnes biten som en "0". Størrelsen til summen kan benyttes som en indikasjon på kvaliteten av bit-avgjørelsen.
NO20064593A 2004-03-08 2006-10-09 Dekoding av sekundærradarmeldinger. NO340709B1 (no)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0405175A GB2412027B (en) 2004-03-08 2004-03-08 Secondary radar message decoding
PCT/GB2005/000865 WO2005085898A1 (en) 2004-03-08 2005-03-08 Secondary radar message decoding

Publications (2)

Publication Number Publication Date
NO20064593L true NO20064593L (no) 2006-12-08
NO340709B1 NO340709B1 (no) 2017-06-06

Family

ID=32088917

Family Applications (2)

Application Number Title Priority Date Filing Date
NO20064593A NO340709B1 (no) 2004-03-08 2006-10-09 Dekoding av sekundærradarmeldinger.
NO20170605A NO341769B1 (no) 2004-03-08 2017-04-10 Dekoding av sekundærradarmeldinger

Family Applications After (1)

Application Number Title Priority Date Filing Date
NO20170605A NO341769B1 (no) 2004-03-08 2017-04-10 Dekoding av sekundærradarmeldinger

Country Status (12)

Country Link
US (1) US7719459B2 (no)
EP (2) EP2146223B1 (no)
AT (1) ATE495465T1 (no)
AU (2) AU2005218248B2 (no)
CA (2) CA2561774C (no)
DE (1) DE602005025856D1 (no)
DK (2) DK1730548T3 (no)
ES (2) ES2436297T3 (no)
GB (1) GB2412027B (no)
NO (2) NO340709B1 (no)
PL (2) PL1730548T3 (no)
WO (1) WO2005085898A1 (no)

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Also Published As

Publication number Publication date
NO20170605A1 (no) 2017-04-10
AU2010207758B2 (en) 2012-02-16
GB2412027A (en) 2005-09-14
CA2791233C (en) 2015-10-27
CA2791233A1 (en) 2005-09-15
ATE495465T1 (de) 2011-01-15
AU2005218248A1 (en) 2005-09-15
EP2146223A2 (en) 2010-01-20
AU2010207758A1 (en) 2010-09-02
US7719459B2 (en) 2010-05-18
EP1730548B1 (en) 2011-01-12
DK2146223T3 (da) 2013-11-25
AU2005218248B2 (en) 2010-08-26
DK1730548T3 (da) 2011-04-04
DE602005025856D1 (de) 2011-02-24
CA2561774C (en) 2013-04-30
EP1730548A1 (en) 2006-12-13
PL1730548T3 (pl) 2011-05-31
PL2146223T3 (pl) 2014-01-31
CA2561774A1 (en) 2005-09-15
WO2005085898A1 (en) 2005-09-15
EP2146223A3 (en) 2010-02-24
ES2436297T3 (es) 2013-12-30
US20060197700A1 (en) 2006-09-07
EP2146223B1 (en) 2013-08-21
NO341769B1 (no) 2018-01-15
GB2412027B (en) 2007-04-11
ES2356921T3 (es) 2011-04-14
GB0405175D0 (en) 2004-04-07
NO340709B1 (no) 2017-06-06

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