CA2004258A1 - Systeme de communication par satellite amrt fonctionnnant en modes d'ouverture large ou etroite pour recevoir des salves de durees diverses - Google Patents

Systeme de communication par satellite amrt fonctionnnant en modes d'ouverture large ou etroite pour recevoir des salves de durees diverses

Info

Publication number
CA2004258A1
CA2004258A1 CA2004258A CA2004258A CA2004258A1 CA 2004258 A1 CA2004258 A1 CA 2004258A1 CA 2004258 A CA2004258 A CA 2004258A CA 2004258 A CA2004258 A CA 2004258A CA 2004258 A1 CA2004258 A1 CA 2004258A1
Authority
CA
Canada
Prior art keywords
counter
reset
clock
communications system
central station
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
CA2004258A
Other languages
English (en)
Other versions
CA2004258C (fr
Inventor
Hizuru Nawata
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.)
NEC Corp
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2004258A1 publication Critical patent/CA2004258A1/fr
Application granted granted Critical
Publication of CA2004258C publication Critical patent/CA2004258C/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H04B7/212—Time-division multiple access [TDMA]
    • H04B7/2125—Synchronisation

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Relay Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Time-Division Multiplex Systems (AREA)
CA002004258A 1988-12-01 1989-11-30 Systeme de communication par satellite amrt fonctionnnant en modes d'ouverture large ou etroite pour recevoir des salves de durees diverses Expired - Lifetime CA2004258C (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP30523288 1988-12-01
JP63-305232 1988-12-01

Publications (2)

Publication Number Publication Date
CA2004258A1 true CA2004258A1 (fr) 1990-06-01
CA2004258C CA2004258C (fr) 1994-08-02

Family

ID=17942622

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002004258A Expired - Lifetime CA2004258C (fr) 1988-12-01 1989-11-30 Systeme de communication par satellite amrt fonctionnnant en modes d'ouverture large ou etroite pour recevoir des salves de durees diverses

Country Status (6)

Country Link
US (1) US5072445A (fr)
EP (1) EP0371500B1 (fr)
JP (1) JPH02256329A (fr)
AU (1) AU623201B2 (fr)
CA (1) CA2004258C (fr)
DE (1) DE68921705T2 (fr)

Families Citing this family (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2723691B2 (ja) * 1991-04-30 1998-03-09 日本電気株式会社 可変タイミング信号発生回路
GB9117645D0 (en) * 1991-08-15 1991-10-02 Motorola Ltd Improvements in or relating to digital communication systems
JP2799476B2 (ja) * 1992-04-13 1998-09-17 富士通株式会社 受信アパーチャ制御方式
JPH0738606B2 (ja) * 1992-10-30 1995-04-26 日本電気株式会社 衛星通信方式
DE4316225C2 (de) * 1993-05-14 2000-06-08 Deutsche Telekom Ag Verfahren und Anordnung zur störungsfreien empfangsseitigen Taktrückgewinnung für Digitalsignale mit konstanter Bitrate
JPH0828754B2 (ja) * 1993-06-30 1996-03-21 日本電気株式会社 フレーム同期方式
FI106824B (fi) * 1993-07-05 2001-04-12 Nokia Networks Oy Tukiasema
JPH0795142A (ja) * 1993-09-20 1995-04-07 Fujitsu Ltd スター型ネットワーク用親局端局装置
US5586150A (en) * 1993-11-24 1996-12-17 Rajupandaram K. Balasubramaniam Method and apparatus for symbol synchronization in multi-level digital FM radio
ES2078179B1 (es) * 1993-12-31 1997-10-16 Alcaltel Standard Electrica S Metodo y dispositivo de sincronizacion automatica de rafagas de datos.
CA2440667A1 (fr) 1994-06-02 1995-12-14 Krista S. Jacobsen Procede et appareil de coordination de communications multi-point a point dans un systeme de transmission de donnees multitonalites
US5625651A (en) * 1994-06-02 1997-04-29 Amati Communications, Inc. Discrete multi-tone data transmission system using an overhead bus for synchronizing multiple remote units
US5644573A (en) * 1995-01-20 1997-07-01 Amati Communications Corporation Methods for coordinating upstream discrete multi-tone data transmissions
AU738026B2 (en) * 1994-06-02 2001-09-06 Amati Communications Corporation Method and apparatus for coordinating multi-point-to-point communications in a multi-tone data transmission system
US5930679A (en) * 1994-10-03 1999-07-27 Motorola, Inc. Satellite-based ring alert apparatus and method of use
US5659545A (en) * 1994-11-15 1997-08-19 Motorola, Inc. Apparatus for mobile unit acquisition in a satellite communication system and method therefor
EP0740431B1 (fr) * 1995-04-28 2005-09-14 Alcatel Procédé d'administration AMRT, station centrale, station terminale et réseau réalisant ce procédé
US6356555B1 (en) 1995-08-25 2002-03-12 Terayon Communications Systems, Inc. Apparatus and method for digital data transmission using orthogonal codes
US6665308B1 (en) 1995-08-25 2003-12-16 Terayon Communication Systems, Inc. Apparatus and method for equalization in distributed digital data transmission systems
US6307868B1 (en) 1995-08-25 2001-10-23 Terayon Communication Systems, Inc. Apparatus and method for SCDMA digital data transmission using orthogonal codes and a head end modem with no tracking loops
US5805583A (en) * 1995-08-25 1998-09-08 Terayon Communication Systems Process for communicating multiple channels of digital data in distributed systems using synchronous code division multiple access
US5761255A (en) * 1995-11-30 1998-06-02 The Boeing Company Edge-synchronized clock recovery unit
US5757784A (en) * 1996-01-04 1998-05-26 Orion Atlantic, L.P. Usage-based billing system for full mesh multimedia satellite network
US5812545A (en) * 1996-01-04 1998-09-22 Orion Atlantic, L.P. Full mesh satellite-based multimedia networking system
JPH09298521A (ja) * 1996-05-08 1997-11-18 Nec Eng Ltd 無線中継制御方法及び無線通信中継制御方式
FI101438B1 (fi) * 1996-05-21 1998-06-15 Nokia Mobile Phones Ltd Signaalin haku eräässä satelliittipuhelinjärjestelmässä
US5784411A (en) * 1996-05-22 1998-07-21 Motorola, Inc. Method and system for processing signals for use in a wireless communication system
US5726983A (en) * 1996-08-09 1998-03-10 Motorola, Inc. Communication device with variable frame processing time
AU6987896A (en) * 1996-09-06 1998-03-26 Brigitta Wagner Wireless communications system using beam direction multiplexing
JP3335530B2 (ja) * 1996-09-25 2002-10-21 松下電器産業株式会社 既知パタン検出装置
US6539003B1 (en) 1997-10-20 2003-03-25 Viasat, Inc. Method for acquisition and synchronization of terminals in a satellite/wireless TDMA system
AU1083799A (en) * 1997-10-20 1999-05-10 Comsat Corporation Method and system for transport of frame relay traffic over satellite/wireless networks
US6937623B2 (en) * 1997-10-22 2005-08-30 Texas Instruments Incorporated Method and apparatus for coordinating multi-point to point communications in a multi-tone data transmission system
US6298048B1 (en) * 1998-04-29 2001-10-02 Hughes Electronics Corporation TDMA system timer for maintaining timing to multiple satellite simultaneously
US6674730B1 (en) * 1998-08-04 2004-01-06 Tachyon, Inc. Method of and apparatus for time synchronization in a communication system
US20020167918A1 (en) * 1998-12-24 2002-11-14 Brewer Charles R. Real-time satellite communication system using separate control and data transmission paths
US6208626B1 (en) 1998-12-24 2001-03-27 Charles R. Brewer Real-time satellite communication system using separate control and data transmission paths
CN1541463A (zh) * 2001-02-06 2004-10-27 ���﹫˾ 用于解调器的状态控制器的系统和方法
US8121050B2 (en) * 2010-04-08 2012-02-21 Exelis Inc. Maintaining time of day synchronization
EP4118765A1 (fr) 2020-04-06 2023-01-18 ViaSat Inc. Détection de rafales sur plusieurs étages pour systèmes de communication

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3789142A (en) * 1971-03-26 1974-01-29 Communications Satellite Corp Frame synchronization technique for satellite on-board switching systems
JPS61170150A (ja) * 1985-01-24 1986-07-31 Nec Corp 時分割多元接続方式における基準局の従局制御装置
JPS62214739A (ja) * 1986-03-15 1987-09-21 Nec Corp 同期制御方式
DE3729586A1 (de) * 1987-09-04 1989-03-16 Ant Nachrichtentech Verfahren zum ausgleichen von durch den doppler-effekt hervorgerufenen laufzeit-verschiebungen der bursts in einem tdma-rahmen sowie anordnung
JPH0828704B2 (ja) * 1988-09-07 1996-03-21 国際電信電話株式会社 ユニークワード検出方式

Also Published As

Publication number Publication date
JPH02256329A (ja) 1990-10-17
EP0371500A2 (fr) 1990-06-06
DE68921705D1 (de) 1995-04-20
AU623201B2 (en) 1992-05-07
AU4579489A (en) 1990-06-07
DE68921705T2 (de) 1995-07-27
EP0371500A3 (fr) 1991-10-02
JPH0580181B2 (fr) 1993-11-08
US5072445A (en) 1991-12-10
CA2004258C (fr) 1994-08-02
EP0371500B1 (fr) 1995-03-15

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry