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FR2418984A1 - RELAY STATION FOR SATELLITE TELECOMMUNICATIONS - Google Patents

RELAY STATION FOR SATELLITE TELECOMMUNICATIONS

Info

Publication number
FR2418984A1
FR2418984A1 FR7905557A FR7905557A FR2418984A1 FR 2418984 A1 FR2418984 A1 FR 2418984A1 FR 7905557 A FR7905557 A FR 7905557A FR 7905557 A FR7905557 A FR 7905557A FR 2418984 A1 FR2418984 A1 FR 2418984A1
Authority
FR
France
Prior art keywords
signal
relay station
output signal
satellite
satellite telecommunications
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
FR7905557A
Other languages
French (fr)
Other versions
FR2418984B1 (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.)
NTT Inc
Original Assignee
Nippon Telegraph and Telephone Corp
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
Priority claimed from JP2358678A external-priority patent/JPS54116860A/en
Priority claimed from JP7864678A external-priority patent/JPS5836862B2/en
Priority claimed from JP7864778A external-priority patent/JPS556912A/en
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Publication of FR2418984A1 publication Critical patent/FR2418984A1/en
Application granted granted Critical
Publication of FR2418984B1 publication Critical patent/FR2418984B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/204—Multiple access
    • H04B7/2046—SS-TDMA, TDMA satellite switching

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Relay Systems (AREA)

Abstract

L'invention concerne une station-relais de satellite utilisant le mode d'accès multiple par répartition dans le temps selon la technique de balayage de faisceau. Plusieurs antennes A1 à AN sont associées à des stations terrestres correspondantes S(1) à S(N) et comportent un faisceau ponctuel étroit à directivité accusée. Tous les paquets de liaison montante sont combinés simplement, et un signal sur voie unique est obtenu. Ce signal est alors divisé en plusieurs signaux par un diviseur 8 après conversion de fréquence. Chaque signal est traité par un déphaseur variable 5, dont le signal de sortie est appliqué à un amplificateur de puissance 6. Un coupleur directif 9 à 2N pôles (N en entrée et N en sortie) est connecté par chacune de ses entrées aux sorties d'amplificateurs de puissance correspondants. Chaque signal de sortie du coupleur produit un paquet de liaison descendante et est connecté à l'antenne d'émission correspondante, dont le faisceau directif ne couvre qu'une seule station terrestre. Application aux télécommunications par satellite.The invention relates to a satellite relay station using the time division multiple access mode according to the beam scanning technique. Several antennas A1 to AN are associated with corresponding earth stations S (1) to S (N) and comprise a narrow point beam with marked directivity. All uplink packets are simply combined, and a single channel signal is obtained. This signal is then divided into several signals by a divider 8 after frequency conversion. Each signal is processed by a variable phase shifter 5, the output signal of which is applied to a power amplifier 6. A directional coupler 9 with 2N poles (N at input and N at output) is connected by each of its inputs to the outputs d 'corresponding power amplifiers. Each coupler output signal produces a downlink packet and is connected to the corresponding transmit antenna, whose directional beam covers only one earth station. Application to satellite telecommunications.

FR7905557A 1978-03-03 1979-03-02 RELAY STATION FOR SATELLITE TELECOMMUNICATIONS Granted FR2418984A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2358678A JPS54116860A (en) 1978-03-03 1978-03-03 Variable power distributor
JP7864678A JPS5836862B2 (en) 1978-06-30 1978-06-30 satellite relay equipment
JP7864778A JPS556912A (en) 1978-06-30 1978-06-30 Satellite repeating system

Publications (2)

Publication Number Publication Date
FR2418984A1 true FR2418984A1 (en) 1979-09-28
FR2418984B1 FR2418984B1 (en) 1982-11-26

Family

ID=27284326

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7905557A Granted FR2418984A1 (en) 1978-03-03 1979-03-02 RELAY STATION FOR SATELLITE TELECOMMUNICATIONS

Country Status (2)

Country Link
DE (1) DE2908031C2 (en)
FR (1) FR2418984A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986003081A1 (en) * 1984-11-13 1986-05-22 Hughes Aircraft Company Two-hop collocated satellite communications system
WO1997018650A1 (en) * 1995-11-15 1997-05-22 Ericsson Inc. High-penetration transmission method for a radiocommunication system
US6314081B1 (en) 1996-01-18 2001-11-06 Ericsson Inc. High power short message service using dedicated carrier frequency

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4301533A (en) * 1979-11-27 1981-11-17 Bell Telephone Laboratories, Incorporated Technique for increasing the rain margin of a TDMA satellite communication system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2129898A1 (en) * 1971-03-19 1972-11-03 Thomson Csf

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2129898A1 (en) * 1971-03-19 1972-11-03 Thomson Csf

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986003081A1 (en) * 1984-11-13 1986-05-22 Hughes Aircraft Company Two-hop collocated satellite communications system
WO1997018650A1 (en) * 1995-11-15 1997-05-22 Ericsson Inc. High-penetration transmission method for a radiocommunication system
US6046990A (en) * 1995-11-15 2000-04-04 Ericsson, Inc. High-penetration transmission method for a radiocommunication system
US6314081B1 (en) 1996-01-18 2001-11-06 Ericsson Inc. High power short message service using dedicated carrier frequency

Also Published As

Publication number Publication date
DE2908031C2 (en) 1982-08-19
FR2418984B1 (en) 1982-11-26
DE2908031A1 (en) 1979-09-06

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse