AU719962B2 - Method and apparatus for precorrecting timing and frequency in communication systems - Google Patents

Method and apparatus for precorrecting timing and frequency in communication systems Download PDF

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Publication number
AU719962B2
AU719962B2 AU46543/97A AU4654397A AU719962B2 AU 719962 B2 AU719962 B2 AU 719962B2 AU 46543/97 A AU46543/97 A AU 46543/97A AU 4654397 A AU4654397 A AU 4654397A AU 719962 B2 AU719962 B2 AU 719962B2
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AU
Australia
Prior art keywords
signal
satellite
frequency
gateway
user terminal
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.)
Ceased
Application number
AU46543/97A
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English (en)
Other versions
AU4654397A (en
Inventor
Steven A. Kremm
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.)
Qualcomm Inc
Original Assignee
Qualcomm Inc
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 Qualcomm Inc filed Critical Qualcomm Inc
Publication of AU4654397A publication Critical patent/AU4654397A/en
Application granted granted Critical
Publication of AU719962B2 publication Critical patent/AU719962B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/01—Reducing phase shift
    • 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
    • H04B7/1851—Systems using a satellite or space-based relay
    • H04B7/18513—Transmission in a satellite or space-based system
    • 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)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Radio Relay Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
AU46543/97A 1996-09-30 1997-09-26 Method and apparatus for precorrecting timing and frequency in communication systems Ceased AU719962B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US72349096A 1996-09-30 1996-09-30
US723490 1996-09-30
PCT/US1997/017380 WO1998015071A1 (en) 1996-09-30 1997-09-26 Method and apparatus for precorrecting timing and frequency in communication systems

Publications (2)

Publication Number Publication Date
AU4654397A AU4654397A (en) 1998-04-24
AU719962B2 true AU719962B2 (en) 2000-05-18

Family

ID=24906496

Family Applications (1)

Application Number Title Priority Date Filing Date
AU46543/97A Ceased AU719962B2 (en) 1996-09-30 1997-09-26 Method and apparatus for precorrecting timing and frequency in communication systems

Country Status (9)

Country Link
EP (1) EP0929949A1 (ko)
JP (2) JP2001501419A (ko)
KR (1) KR100791824B1 (ko)
CN (1) CN1140068C (ko)
AU (1) AU719962B2 (ko)
CA (1) CA2267169A1 (ko)
TW (1) TW448646B (ko)
WO (1) WO1998015071A1 (ko)
ZA (1) ZA978516B (ko)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6381225B1 (en) * 1998-08-27 2002-04-30 Qualcomm Incorporated System and method for resolving frequency and timing uncertainty in access transmissions in a spread spectrum communication system
KR100401123B1 (ko) * 2000-12-27 2003-10-10 한국전자통신연구원 비 정지궤도 이동통신 시스템에서의 도플러 천이 주파수보상 방법
US7330524B2 (en) * 2004-12-30 2008-02-12 Atheros Communications, Inc. Joint synchronization and impairments estimation using known data patterns
US7991362B2 (en) * 2005-07-20 2011-08-02 Qualcomm Incorporated Methods and apparatus for supporting timing and/or frequency corrections in a wireless communications system
US8798638B2 (en) 2005-07-20 2014-08-05 Qualcomm Incorporated Methods and apparatus for providing base station position information and using position information to support timing and/or frequency corrections
WO2007128248A1 (de) * 2006-05-03 2007-11-15 Siemens Aktiengesellschaft Verfahren zur frequenzabstimmung eines senders und eines empfängers eines mobilen kommunikationsendgerätes zur kompensation des einflusses des dopplereffektes und mobiles kommunikationendgerät
TWI385933B (zh) * 2008-06-20 2013-02-11 Hon Hai Prec Ind Co Ltd 中頻訊號損耗補償電路
US8116419B2 (en) * 2008-07-14 2012-02-14 Alcatel Lucent Methods and apparatuses for estimating time delay and frequency offset in single frequency networks
CN102136849A (zh) * 2011-04-25 2011-07-27 中国科学院自动化研究所 入向链路码分多址的星形无线通信网络系统及实现方法
KR20150092090A (ko) * 2012-11-30 2015-08-12 엘지전자 주식회사 초고주파 대역을 지원하는 무선 접속 시스템에서 도플러 확산 완화 방법 및 장치
US9900856B2 (en) * 2015-03-20 2018-02-20 Qualcomm Incorporated Method and apparatus for time or frequency synchronization in non-geosynchronous satellite communication systems
CN106572045B (zh) * 2016-09-27 2019-12-13 北京无线电计量测试研究所 一种卫星时间比对等效带宽合成信号的调制系统与方法
FR3058531B1 (fr) * 2016-11-08 2019-08-09 Sigfox Procede de transmission d’un signal par un dispositif emetteur vers un satellite non geosynchrone
CN110545136B (zh) * 2019-07-31 2021-11-23 上海众睿通信科技有限公司 低轨卫星多载波通信系统上行链路载波频偏估计与补偿方法
CN111224909A (zh) * 2019-11-22 2020-06-02 辰芯科技有限公司 一种频率补偿方法、装置、用户终端和存储介质
CN110798422B (zh) * 2019-11-25 2022-01-07 成都天奥集团有限公司 低轨卫星多载波通信系统下行链路采样频偏估计与补偿方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3864634A (en) * 1973-10-01 1975-02-04 Us Navy Doppler correction circuit
EP0337269A2 (de) * 1988-04-14 1989-10-18 ANT Nachrichtentechnik GmbH Verfahren und Anordnung zum Reduzieren von Frequenzablagen beim Mobilfunk über Satellit
WO1996008882A1 (en) * 1994-09-14 1996-03-21 Ericsson Inc. Frequency error correction in a satellite-mobile communications system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62214739A (ja) * 1986-03-15 1987-09-21 Nec Corp 同期制御方式
JP3033176B2 (ja) * 1990-10-19 2000-04-17 日本電気株式会社 衛星通信地球局用ａｆｃ装置
FR2681995B1 (fr) * 1991-10-01 1993-12-10 Alcatel Espace Procede de basculement du trafic dans un systeme de communications par satellites en orbite basse a destination de terminaux et systeme de communications mettant en óoeuvre un tel procede.
JPH06244763A (ja) * 1993-02-19 1994-09-02 Matsushita Electric Ind Co Ltd 衛星通信装置
US5666648A (en) 1993-11-09 1997-09-09 Leo One Ip, L.L.C. Polar relay system for satellite communication
US5463400A (en) * 1994-06-30 1995-10-31 Motorola, Inc. Method and apparatus for synchronizing to a multi-beam satellite TDMA communication system
US5566354A (en) 1994-09-26 1996-10-15 Sehloemer; Jerry R. System and method for channel assignment in a satellite telephone 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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3864634A (en) * 1973-10-01 1975-02-04 Us Navy Doppler correction circuit
EP0337269A2 (de) * 1988-04-14 1989-10-18 ANT Nachrichtentechnik GmbH Verfahren und Anordnung zum Reduzieren von Frequenzablagen beim Mobilfunk über Satellit
WO1996008882A1 (en) * 1994-09-14 1996-03-21 Ericsson Inc. Frequency error correction in a satellite-mobile communications system

Also Published As

Publication number Publication date
TW448646B (en) 2001-08-01
ZA978516B (en) 1998-06-10
JP2009201143A (ja) 2009-09-03
WO1998015071A1 (en) 1998-04-09
JP2001501419A (ja) 2001-01-30
CN1140068C (zh) 2004-02-25
CA2267169A1 (en) 1998-04-09
KR100791824B1 (ko) 2008-01-04
KR20000049034A (ko) 2000-07-25
CN1238866A (zh) 1999-12-15
AU4654397A (en) 1998-04-24
EP0929949A1 (en) 1999-07-21

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