ZA978516B - Method and apparatus for precorrecting timing and frequency in communication systems. - Google Patents

Method and apparatus for precorrecting timing and frequency in communication systems.

Info

Publication number
ZA978516B
ZA978516B ZA9708516A ZA978516A ZA978516B ZA 978516 B ZA978516 B ZA 978516B ZA 9708516 A ZA9708516 A ZA 9708516A ZA 978516 A ZA978516 A ZA 978516A ZA 978516 B ZA978516 B ZA 978516B
Authority
ZA
South Africa
Prior art keywords
precorrecting
timing
frequency
communication systems
systems
Prior art date
Application number
ZA9708516A
Other languages
English (en)
Inventor
Steven A Kremm
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 ZA978516B publication Critical patent/ZA978516B/xx

Links

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)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
ZA9708516A 1996-09-30 1997-09-22 Method and apparatus for precorrecting timing and frequency in communication systems. ZA978516B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US72349096A 1996-09-30 1996-09-30

Publications (1)

Publication Number Publication Date
ZA978516B true ZA978516B (en) 1998-06-10

Family

ID=24906496

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA9708516A ZA978516B (en) 1996-09-30 1997-09-22 Method and apparatus for precorrecting timing and frequency in communication systems.

Country Status (9)

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

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
US9735842B2 (en) 2012-11-30 2017-08-15 Lg Electronics Inc. Method and apparatus for relieving doppler broadening in wireless access system that supports super high frequency band
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
CN111224909B (zh) * 2019-11-22 2024-09-27 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

Family Cites Families (11)

* 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
JPS62214739A (ja) * 1986-03-15 1987-09-21 Nec Corp 同期制御方式
DE58907319D1 (de) * 1988-04-14 1994-05-05 Ant Nachrichtentech Verfahren und Anordnung zum Reduzieren von Frequenzablagen beim Mobilfunk über Satellit.
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
US5742908A (en) * 1994-09-14 1998-04-21 Ericsson Inc. Frequency error correction in a satellite-mobile communications 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

Also Published As

Publication number Publication date
KR20000049034A (ko) 2000-07-25
TW448646B (en) 2001-08-01
EP0929949A1 (en) 1999-07-21
AU4654397A (en) 1998-04-24
KR100791824B1 (ko) 2008-01-04
CN1238866A (zh) 1999-12-15
JP2001501419A (ja) 2001-01-30
WO1998015071A1 (en) 1998-04-09
JP2009201143A (ja) 2009-09-03
AU719962B2 (en) 2000-05-18
CN1140068C (zh) 2004-02-25
CA2267169A1 (en) 1998-04-09

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