FR2425776B1 - - Google Patents

Info

Publication number
FR2425776B1
FR2425776B1 FR7813604A FR7813604A FR2425776B1 FR 2425776 B1 FR2425776 B1 FR 2425776B1 FR 7813604 A FR7813604 A FR 7813604A FR 7813604 A FR7813604 A FR 7813604A FR 2425776 B1 FR2425776 B1 FR 2425776B1
Authority
FR
France
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
FR7813604A
Other versions
FR2425776A1 (fr
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.)
Sercel SAS
Original Assignee
Sercel SAS
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 Sercel SAS filed Critical Sercel SAS
Priority to FR7813604A priority Critical patent/FR2425776A1/fr
Priority to US06/037,068 priority patent/US4334314A/en
Publication of FR2425776A1 publication Critical patent/FR2425776A1/fr
Application granted granted Critical
Publication of FR2425776B1 publication Critical patent/FR2425776B1/fr
Granted 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
    • G01S7/42—Diversity systems specially adapted for radar
    • 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
    • G01S13/87—Combinations of radar systems, e.g. primary radar and secondary radar
    • G01S13/876—Combination of several spaced transponders or reflectors of known location for determining the position of a receiver
    • 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
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/14—Determining absolute distances from a plurality of spaced points of known location
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
    • H04B7/0822—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection according to predefined selection scheme
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/0842—Weighted combining
    • H04B7/0848—Joint weighting
    • H04B7/0854—Joint weighting using error minimizing algorithms, e.g. minimum mean squared error [MMSE], "cross-correlation" or matrix inversion

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Mathematical Physics (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Radio Transmission System (AREA)
FR7813604A 1978-05-09 1978-05-09 Transmission radio-electrique d'un repere temporel, notamment pour mesures de distances transhorizon Granted FR2425776A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR7813604A FR2425776A1 (fr) 1978-05-09 1978-05-09 Transmission radio-electrique d'un repere temporel, notamment pour mesures de distances transhorizon
US06/037,068 US4334314A (en) 1978-05-09 1979-05-03 Transmission of time referenced radio waves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7813604A FR2425776A1 (fr) 1978-05-09 1978-05-09 Transmission radio-electrique d'un repere temporel, notamment pour mesures de distances transhorizon

Publications (2)

Publication Number Publication Date
FR2425776A1 FR2425776A1 (fr) 1979-12-07
FR2425776B1 true FR2425776B1 (fr) 1980-09-26

Family

ID=9208003

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7813604A Granted FR2425776A1 (fr) 1978-05-09 1978-05-09 Transmission radio-electrique d'un repere temporel, notamment pour mesures de distances transhorizon

Country Status (2)

Country Link
US (1) US4334314A (fr)
FR (1) FR2425776A1 (fr)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4423419A (en) * 1980-10-20 1983-12-27 Megapulse Incorporated Pulsed, pseudo random position fixing radio navigation method and system and the like
JPS58111784A (ja) * 1981-12-25 1983-07-02 Nec Corp 時刻の遠隔較正方式
FR2519768B1 (fr) * 1982-01-11 1985-12-13 Rech Const Electro Et Procede et equipement de radionavigation mixte avec distances et pseudo-distances
WO1995018977A1 (fr) * 1994-01-03 1995-07-13 Trimble Navigation Reseau de corrections differentielles gps utilisant des signaux de phase de code
US5477458A (en) * 1994-01-03 1995-12-19 Trimble Navigation Limited Network for carrier phase differential GPS corrections
US6191724B1 (en) * 1999-01-28 2001-02-20 Mcewan Thomas E. Short pulse microwave transceiver
US6799116B2 (en) 2000-12-15 2004-09-28 Trimble Navigation Limited GPS correction methods, apparatus and signals
US7969311B2 (en) 2005-12-15 2011-06-28 Invisitrack, Inc. Multi-path mitigation in rangefinding and tracking objects using reduced attenuation RF technology
US9699607B2 (en) 2005-12-15 2017-07-04 Polte Corporation Multi-path mitigation in rangefinding and tracking objects using reduced attenuation RF technology
US10834531B2 (en) 2005-12-15 2020-11-10 Polte Corporation Multi-path mitigation in rangefinding and tracking objects using reduced attenuation RF technology
US10281557B2 (en) 2005-12-15 2019-05-07 Polte Corporation Partially synchronized multilateration/trilateration method and system for positional finding using RF
US10091616B2 (en) 2005-12-15 2018-10-02 Polte Corporation Angle of arrival (AOA) positioning method and system for positional finding and tracking objects using reduced attenuation RF technology
US9913244B2 (en) 2005-12-15 2018-03-06 Polte Corporation Partially synchronized multilateration or trilateration method and system for positional finding using RF
US7561048B2 (en) * 2005-12-15 2009-07-14 Invisitrack, Inc. Methods and system for reduced attenuation in tracking objects using RF technology
US9288623B2 (en) 2005-12-15 2016-03-15 Invisitrack, Inc. Multi-path mitigation in rangefinding and tracking objects using reduced attenuation RF technology
US9813867B2 (en) 2005-12-15 2017-11-07 Polte Corporation Angle of arrival (AOA) positioning method and system for positional finding and tracking objects using reduced attenuation RF technology
JP5029060B2 (ja) * 2007-02-23 2012-09-19 日本電気株式会社 合成開口レーダおよび合成開口レーダ画像再生処理方法
US7602336B2 (en) * 2007-06-11 2009-10-13 The Aerospace Corporation Coherently combining antennas
WO2013020122A2 (fr) 2011-08-03 2013-02-07 Felix Markhovsky Propagation multitrajet dans des objets de télémétrie et de suivi utilisant une technologie rf à atténuation réduite
US11125850B2 (en) 2011-08-03 2021-09-21 Polte Corporation Systems and methods for determining a timing offset of emitter antennas in a wireless network
US11835639B2 (en) 2011-08-03 2023-12-05 Qualcomm Technologies, Inc. Partially synchronized multilateration or trilateration method and system for positional finding using RF
US10845453B2 (en) 2012-08-03 2020-11-24 Polte Corporation Network architecture and methods for location services
US10863313B2 (en) 2014-08-01 2020-12-08 Polte Corporation Network architecture and methods for location services
US10440512B2 (en) 2012-08-03 2019-10-08 Polte Corporation Angle of arrival (AOA) positioning method and system for positional finding and tracking objects using reduced attenuation RF technology
GB2522217A (en) * 2014-01-16 2015-07-22 Parcelhome Ltd Electronic lock apparatus, method and system
GB2522892A (en) * 2014-02-08 2015-08-12 Nimble Devices Oy Method and system for determining spatial position of receiving device
US11255945B2 (en) 2018-03-27 2022-02-22 Polte Corporation Multi-path mitigation in tracking objects using compressed RF data

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1071159B (fr) 1957-12-19
US3750178A (en) * 1959-05-22 1973-07-31 Itt Radio location detection system
US3213370A (en) * 1961-03-13 1965-10-19 Ibm Signal selecting system with switching at the interstice between data increments
US3348152A (en) * 1964-03-23 1967-10-17 Jr Charles R Laughlin Diversity receiving system with diversity phase-lock
US3555427A (en) * 1968-02-01 1971-01-12 Raytheon Co Digital diversity reception system
US3646443A (en) * 1968-10-01 1972-02-29 Raytheon Co Multiaperture receiving and transmitting system
US3604004A (en) * 1969-02-10 1971-09-07 Edward M Buyer Dual frequency radio apparatus for data transmission and direction finding
US3863257A (en) * 1972-06-27 1975-01-28 Us Air Force Passive ranging by time difference multi-path
US3783385A (en) * 1972-11-28 1974-01-01 Itt Digital diversity combiner
JPS5147313A (fr) * 1974-10-21 1976-04-22 Nippon Telegraph & Telephone
US4101893A (en) * 1977-08-05 1978-07-18 The United States Of America As Represented By The Secretary Of The Navy Aircraft landing aid for zero-zero visibility landings
US4166275A (en) * 1977-08-18 1979-08-28 Digital Marine Electronics Corporation Loran receiver system

Also Published As

Publication number Publication date
FR2425776A1 (fr) 1979-12-07
US4334314A (en) 1982-06-08

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