DE60128747D1 - Koheränte Synchronisation von Kodevielfachzugriffssignalen - Google Patents

Koheränte Synchronisation von Kodevielfachzugriffssignalen

Info

Publication number
DE60128747D1
DE60128747D1 DE60128747T DE60128747T DE60128747D1 DE 60128747 D1 DE60128747 D1 DE 60128747D1 DE 60128747 T DE60128747 T DE 60128747T DE 60128747 T DE60128747 T DE 60128747T DE 60128747 D1 DE60128747 D1 DE 60128747D1
Authority
DE
Germany
Prior art keywords
multiple access
division multiple
code division
access signals
coherent synchronization
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.)
Expired - Lifetime
Application number
DE60128747T
Other languages
English (en)
Other versions
DE60128747T2 (de
Inventor
Donald C D Chang
Kar W Yung
David C Cheng
Frank A Hagen
Ming U Chang
John I Novak Iii
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.)
DirecTV Group Inc
Original Assignee
Hughes Electronics 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
Application filed by Hughes Electronics Corp filed Critical Hughes Electronics Corp
Application granted granted Critical
Publication of DE60128747D1 publication Critical patent/DE60128747D1/de
Publication of DE60128747T2 publication Critical patent/DE60128747T2/de
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
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
    • H04B7/18532—Arrangements for managing transmission, i.e. for transporting data or a signalling message
    • H04B7/18534—Arrangements for managing transmission, i.e. for transporting data or a signalling message for enhancing link reliablility, e.g. satellites diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/7097—Direct sequence modulation interference
    • H04B2201/709709—Methods of preventing interference

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Radio Relay Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
DE60128747T 2000-04-17 2001-04-12 Kohärente Synchronisation von Kodevielfachzugriffssignalen Expired - Lifetime DE60128747T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/550,505 US6963548B1 (en) 2000-04-17 2000-04-17 Coherent synchronization of code division multiple access signals
US550505 2000-04-17

Publications (2)

Publication Number Publication Date
DE60128747D1 true DE60128747D1 (de) 2007-07-19
DE60128747T2 DE60128747T2 (de) 2008-01-31

Family

ID=24197440

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60128747T Expired - Lifetime DE60128747T2 (de) 2000-04-17 2001-04-12 Kohärente Synchronisation von Kodevielfachzugriffssignalen

Country Status (3)

Country Link
US (1) US6963548B1 (de)
EP (1) EP1148662B1 (de)
DE (1) DE60128747T2 (de)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6785553B2 (en) 1998-12-10 2004-08-31 The Directv Group, Inc. Position location of multiple transponding platforms and users using two-way ranging as a calibration reference for GPS
US6337980B1 (en) 1999-03-18 2002-01-08 Hughes Electronics Corporation Multiple satellite mobile communications method and apparatus for hand-held terminals
US6920309B1 (en) 1999-03-18 2005-07-19 The Directv Group, Inc. User positioning technique for multi-platform communication system
US6990314B1 (en) 1999-03-18 2006-01-24 The Directv Group, Inc. Multi-node point-to-point satellite communication system employing multiple geo satellites
US7027769B1 (en) 2000-03-31 2006-04-11 The Directv Group, Inc. GEO stationary communications system with minimal delay
US6756937B1 (en) 2000-06-06 2004-06-29 The Directv Group, Inc. Stratospheric platforms based mobile communications architecture
US7200360B1 (en) 2000-06-15 2007-04-03 The Directv Group, Inc. Communication system as a secondary platform with frequency reuse
US6829479B1 (en) 2000-07-14 2004-12-07 The Directv Group. Inc. Fixed wireless back haul for mobile communications using stratospheric platforms
US7317916B1 (en) 2000-09-14 2008-01-08 The Directv Group, Inc. Stratospheric-based communication system for mobile users using additional phased array elements for interference rejection
US6763242B1 (en) 2000-09-14 2004-07-13 The Directv Group, Inc. Resource assignment system and method for determining the same
US7809403B2 (en) 2001-01-19 2010-10-05 The Directv Group, Inc. Stratospheric platforms communication system using adaptive antennas
US7187949B2 (en) 2001-01-19 2007-03-06 The Directv Group, Inc. Multiple basestation communication system having adaptive antennas
US8396513B2 (en) 2001-01-19 2013-03-12 The Directv Group, Inc. Communication system for mobile users using adaptive antenna
US7068616B2 (en) * 2001-02-05 2006-06-27 The Directv Group, Inc. Multiple dynamic connectivity for satellite communications systems
CA2532080A1 (en) * 2003-07-11 2005-01-27 Qualcomm Incorporated Dynamic shared forward link channel for a wireless communication system
US20050095982A1 (en) * 2003-11-05 2005-05-05 Blanchard Scott D. MSS user equipment and methods for synchronizing MSS user equipment
US20050288012A1 (en) * 2004-06-23 2005-12-29 William Morgan Timing compensation method and means for a terrestrial wireless communication system having satelite backhaul link
US7519253B2 (en) 2005-11-18 2009-04-14 Omni Sciences, Inc. Broadband or mid-infrared fiber light sources
US8331888B2 (en) * 2006-05-31 2012-12-11 The Boeing Company Remote programmable reference
US8107875B2 (en) 2006-09-26 2012-01-31 Viasat, Inc. Placement of gateways near service beams
US8538323B2 (en) 2006-09-26 2013-09-17 Viasat, Inc. Satellite architecture
EP2645597B2 (de) 2006-09-26 2024-03-06 ViaSat, Inc. Verbesserte Spotbeam-Satellitensysteme
US20090298423A1 (en) * 2006-10-03 2009-12-03 Viasat, Inc. Piggy-Back Satellite Payload
US8218474B2 (en) * 2008-11-18 2012-07-10 Socovar S.E.C. Bandwidth allocation in satellite communication networks

Family Cites Families (92)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3384891A (en) 1965-02-11 1968-05-21 Gen Electric Method and system for long distance navigation and communication
DE1591517B1 (de) 1967-07-21 1971-08-05 Siemens Ag Funk-Ortungsverfahren durch Laufzeitmessung zu Fahrzeugen mit Transpondern ueber Erdsatelliten
US3593138A (en) * 1968-07-31 1971-07-13 Nasa Satellite interlace synchronization system
US3611435A (en) * 1969-03-24 1971-10-05 Itt Satellite communication system
US3742498A (en) * 1970-05-06 1973-06-26 Itt Synchronization and position location system
US3982075A (en) * 1974-09-09 1976-09-21 The Post Office Synchronization system for time division multiple access relay communications system
JPS5197316A (en) * 1975-02-24 1976-08-26 Eiseitsushinniokeru shuhasudokihoshiki
US4161734A (en) 1977-10-17 1979-07-17 General Electric Company Position surveillance using one active ranging satellite and time of arrival of a signal from an independent satellite
US4161730A (en) 1977-10-17 1979-07-17 General Electric Company Radio determination using satellites transmitting timing signals with correction by active range measurement
US4359733A (en) 1980-09-23 1982-11-16 Neill Gerard K O Satellite-based vehicle position determining system
DE3301613A1 (de) 1983-01-19 1984-07-19 Standard Elektrik Lorenz Ag, 7000 Stuttgart Positionsbestimmungssystem
IT1161466B (it) * 1983-01-21 1987-03-18 Cselt Centro Studi Lab Telecom Apparecchiatura in banda base per stazioni di terra di un sistema di trasmissione via satellite con accesso a divisione di tempo
US4819227A (en) 1986-08-14 1989-04-04 Hughes Aircraft Company Satellite communications system employing frequency reuse
US5006855A (en) 1986-08-20 1991-04-09 The Mitre Corporation Ranging and processing system for mobile surveillance and data link
US4901307A (en) * 1986-10-17 1990-02-13 Qualcomm, Inc. Spread spectrum multiple access communication system using satellite or terrestrial repeaters
JPS63253278A (ja) 1987-04-10 1988-10-20 Sony Corp 衛星を用いた測位方法
US4979170A (en) 1988-01-19 1990-12-18 Qualcomm, Inc. Alternating sequential half duplex communication system
JP2615753B2 (ja) * 1988-02-10 1997-06-04 日本電気株式会社 自動位相調整方式
GB2215932A (en) 1988-03-26 1989-09-27 Gec Traffic Automation Radio position finding system
US5109390A (en) * 1989-11-07 1992-04-28 Qualcomm Incorporated Diversity receiver in a cdma cellular telephone system
US5126748A (en) 1989-12-05 1992-06-30 Qualcomm Incorporated Dual satellite navigation system and method
US4994809A (en) 1990-03-07 1991-02-19 Hughes Aircraft Company Polystatic correlating radar
JP2979582B2 (ja) 1990-05-23 1999-11-15 ソニー株式会社 伝送システム
US5506864A (en) 1990-12-05 1996-04-09 Interdigital Technology Corporation CDMA communications and geolocation system and method
US5218619A (en) 1990-12-17 1993-06-08 Ericsson Ge Mobile Communications Holding, Inc. CDMA subtractive demodulation
US5077562A (en) 1990-12-24 1991-12-31 Hughes Aircraft Company Digital beam-forming technique using temporary noise injection
EP0496007B1 (de) 1991-01-21 1996-07-10 Nec Corporation Spreizpaketkommunikationssystem
FR2681199B1 (fr) 1991-09-11 1993-12-03 Agence Spatiale Europeenne Procede et dispositif pour multiplexer des signaux de donnees.
US5365447A (en) 1991-09-20 1994-11-15 Dennis Arthur R GPS and satelite navigation system
US6067442A (en) 1991-10-10 2000-05-23 Globalstar L.P. Satellite communications system having distributed user assignment and resource assignment with terrestrial gateways
CA2091962A1 (en) * 1992-03-31 1993-10-01 Mark L. Witsaman Clock synchronization system
US5485485A (en) 1992-04-10 1996-01-16 Cd Radio Inc. Radio frequency broadcasting systems and methods using two low-cost geosynchronous satellites and hemispherical coverage antennas
US5278863A (en) 1992-04-10 1994-01-11 Cd Radio Incorporated Radio frequency broadcasting systems and methods using two low-cost geosynchronous satellites
US5550809A (en) 1992-04-10 1996-08-27 Ericsson Ge Mobile Communications, Inc. Multiple access coding using bent sequences for mobile radio communications
US5233626A (en) * 1992-05-11 1993-08-03 Space Systems/Loral Inc. Repeater diversity spread spectrum communication system
GB2271248B (en) * 1992-10-05 1997-04-02 Motorola Inc Simulcast transmission system
US5361398A (en) * 1993-01-29 1994-11-01 Motorola, Inc. Method and apparatus for transmission path delay measurements using adaptive demodulation
DE4303355A1 (de) * 1993-02-05 1994-08-11 Philips Patentverwaltung Funksystem
US5379320A (en) 1993-03-11 1995-01-03 Southern California Edison Company Hitless ultra small aperture terminal satellite communication network
US5510797A (en) * 1993-04-15 1996-04-23 Trimble Navigation Limited Provision of SPS timing signals
JP3296822B2 (ja) * 1993-06-14 2002-07-02 テレフオンアクチーボラゲツト エル エム エリクソン Ｃｄｍａシステムのダウンリンクにおける伝送の時間調整
US5423059A (en) 1993-07-29 1995-06-06 Motorola Inc. Method for enhancing signal quality in a simulcast communication system
US5444450A (en) 1993-08-11 1995-08-22 Motorola, Inc. Radio telecommunications system and method with adaptive location determination convergence
US6020845A (en) 1993-11-19 2000-02-01 Stanford Telecommunications, Inc. Satellite for increasing the utility of satellite communication systems
US5572216A (en) 1993-11-19 1996-11-05 Stanford Telecommunications, Inc. System for increasing the utility of satellite communication systems
DE4343765C2 (de) 1993-12-21 2003-11-13 Detecon Gmbh Steuerungssystem für die Funkversorgung in einem zellularen, digitalen Mobilkommunikationssystem
US5619503A (en) 1994-01-11 1997-04-08 Ericsson Inc. Cellular/satellite communications system with improved frequency re-use
JP2677191B2 (ja) * 1994-03-15 1997-11-17 日本電気株式会社 Ｃｄｍａ通信方式
US5589834A (en) 1994-04-22 1996-12-31 Stanford Telecommunications, Inc. Cost effective geosynchronous mobile satellite communication system
US5859874A (en) 1994-05-09 1999-01-12 Globalstar L.P. Multipath communication system optimizer
US5625640A (en) * 1994-09-16 1997-04-29 Hughes Electronics Apparatus for and method of broadcast satellite network return-link signal transmission
US5691974A (en) 1995-01-04 1997-11-25 Qualcomm Incorporated Method and apparatus for using full spectrum transmitted power in a spread spectrum communication system for tracking individual recipient phase, time and energy
US5608722A (en) * 1995-04-03 1997-03-04 Qualcomm Incorporated Multi-user communication system architecture with distributed receivers
US5592471A (en) 1995-04-21 1997-01-07 Cd Radio Inc. Mobile radio receivers using time diversity to avoid service outages in multichannel broadcast transmission systems
US5508708A (en) 1995-05-08 1996-04-16 Motorola, Inc. Method and apparatus for location finding in a CDMA system
JP2661589B2 (ja) 1995-05-22 1997-10-08 日本電気株式会社 Ｇｐｓによるダイナミックキューイング方式
US5696766A (en) * 1995-06-02 1997-12-09 Dsc Communications Corporation Apparatus and method of synchronizing a transmitter in a subscriber terminal of a wireless telecommunications system
AU700251B2 (en) 1995-06-06 1998-12-24 Globalstar L.P. Satellite repeater diversity resource management system
FR2737627B1 (fr) 1995-08-02 1997-10-03 Europ Agence Spatiale Systeme de transmission de signaux radioelectriques via un satellite de communication geostationnaire, notamment pour des communications avec des terminaux mobiles portables
US5612701A (en) 1995-09-18 1997-03-18 Motorola, Inc. Adaptive beam pointing method and apparatus for a communication system
US5644572A (en) 1995-10-03 1997-07-01 Motorola, Inc. Method and apparatus for approximating propagation delay for use in transmission compensation to orbiting satellites
GB2339099B (en) 1995-10-24 2000-05-31 Inmarsat Ltd Satellite radiodetermination
GB2307621B (en) 1995-11-21 1997-12-03 At & T Corp Cdma air interface for radio local loop system
US5907813A (en) 1995-11-30 1999-05-25 Qualcomm Incorporated Signal acquisition in a wireless communication system by transmitting repeated access probes from a terminal to a hub
US5909460A (en) 1995-12-07 1999-06-01 Ericsson, Inc. Efficient apparatus for simultaneous modulation and digital beamforming for an antenna array
US5812961A (en) 1995-12-28 1998-09-22 Trimble Navigation Limited Method and reciever using a low earth orbiting satellite signal to augment the global positioning system
US5878034A (en) 1996-05-29 1999-03-02 Lockheed Martin Corporation Spacecraft TDMA communications system with synchronization by spread spectrum overlay channel
JPH1013918A (ja) * 1996-06-19 1998-01-16 Toshiba Corp 符号分割多元接続方式を採用した移動通信システムとその無線通信装置
US5890067A (en) 1996-06-26 1999-03-30 Bnr Inc. Multi-beam antenna arrays for base stations in which the channel follows the mobile unit
US5864579A (en) 1996-07-25 1999-01-26 Cd Radio Inc. Digital radio satellite and terrestrial ubiquitous broadcasting system using spread spectrum modulation
US5945948A (en) 1996-09-03 1999-08-31 Motorola, Inc. Method and apparatus for location finding in a communication system
US5920284A (en) 1996-09-30 1999-07-06 Qualcomm Incorporated Ambiguity resolution for ambiguous position solutions using satellite beams
US5909470A (en) * 1996-10-11 1999-06-01 Arraycomm, Inc. Method and apparatus for decision directed demodulation using antenna arrays and spatial processing
GB2318482B (en) 1996-10-16 2001-06-13 Ico Services Ltd Communication system
US5856804A (en) 1996-10-30 1999-01-05 Motorola, Inc. Method and intelligent digital beam forming system with improved signal quality communications
US5844521A (en) 1996-12-02 1998-12-01 Trw Inc. Geolocation method and apparatus for satellite based telecommunications system
US5956619A (en) 1996-12-12 1999-09-21 Globalstar L.P. Satellite controlled power control for personal communication user terminals
US6151308A (en) 1996-12-30 2000-11-21 Motorola, Inc. Elevated communication hub and method of operation therefor
US5949766A (en) 1996-12-30 1999-09-07 Motorola, Inc. Ground device for communicating with an elevated communication hub and method of operation thereof
US6377208B2 (en) 1997-02-21 2002-04-23 Hughes Electronics Corporation Method and system for determining a position of a transceiver unit utilizing two-way ranging in a polystatic satellite configuration
US5969674A (en) 1997-02-21 1999-10-19 Von Der Embse; Urban A. Method and system for determining a position of a target vehicle utilizing two-way ranging
US5903549A (en) 1997-02-21 1999-05-11 Hughes Electronics Corporation Ground based beam forming utilizing synchronized code division multiplexing
EP0860708B1 (de) 1997-02-21 2005-07-27 Hughes Electronics Corporation Verfahren und Vorrichtung zur Ortsbestimmung für Sende-Empfanganlage mittels Zweiweg-Entfernungsbestimmung in einer polystatischen Satellitenkonfiguration mit Bodenradar
US5943331A (en) * 1997-02-28 1999-08-24 Interdigital Technology Corporation Orthogonal code synchronization system and method for spread spectrum CDMA communications
US5918157A (en) 1997-03-18 1999-06-29 Globalstar L.P. Satellite communications system having distributed user assignment and resource assignment with terrestrial gateways
US5790070A (en) 1997-05-05 1998-08-04 Motorola, Inc. Network and method for controlling steerable beams
US6138012A (en) 1997-08-04 2000-10-24 Motorola, Inc. Method and apparatus for reducing signal blocking in a satellite communication system
US6028884A (en) 1997-10-14 2000-02-22 Qualcomm Incorporated Method and apparatus for measuring nonlinear effects in a communication system
US5966371A (en) 1997-10-17 1999-10-12 At&T Corp. Method and system for reducing interbeam interference and multipath fading in bent-pipe satellite communications systems
US5982337A (en) 1998-02-20 1999-11-09 Marconi Aerospace Systems Inc. Cellular antennas for stratosphere coverage of multi-band annular earth pattern
US6615024B1 (en) * 1998-05-01 2003-09-02 Arraycomm, Inc. Method and apparatus for determining signatures for calibrating a communication station having an antenna array
US6337980B1 (en) 1999-03-18 2002-01-08 Hughes Electronics Corporation Multiple satellite mobile communications method and apparatus for hand-held terminals

Also Published As

Publication number Publication date
DE60128747T2 (de) 2008-01-31
EP1148662A2 (de) 2001-10-24
US6963548B1 (en) 2005-11-08
EP1148662A3 (de) 2002-04-17
EP1148662B1 (de) 2007-06-06

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