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
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/en

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)
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 (en)
JP (2) JP2001501419A (en)
KR (1) KR100791824B1 (en)
CN (1) CN1140068C (en)
AU (1) AU719962B2 (en)
CA (1) CA2267169A1 (en)
TW (1) TW448646B (en)
WO (1) WO1998015071A1 (en)
ZA (1) ZA978516B (en)

Families Citing this family (15)

* 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 (en) * 2000-12-27 2003-10-10 한국전자통신연구원 Compensation Method of the Doppler Shift Frequency in the Non-Geostationary Satellite Orbit Mobile Satellite Communication System
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 (en) * 2006-05-03 2007-11-15 Siemens Aktiengesellschaft Method for frequency tuning in a transmitter and a receiver in a mobile communication terminal to compensate for the influence of the doppler effect, and mobile communication terminal
TWI385933B (en) * 2008-06-20 2013-02-11 Hon Hai Prec Ind Co Ltd Compensation circuit for intermediate frequency signal loss
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 (en) * 2011-04-25 2011-07-27 中国科学院自动化研究所 Wireless communication star network system with code division multiple access (CDMA) inward link and realization method thereof
EP2928096B1 (en) 2012-11-30 2020-03-04 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 (en) * 2016-09-27 2019-12-13 北京无线电计量测试研究所 Modulation system and method for satellite time comparison equivalent bandwidth synthesis signal
FR3058531B1 (en) * 2016-11-08 2019-08-09 Sigfox METHOD FOR TRANSMITTING A SIGNAL BY A TRANSMITTING DEVICE TO A NON-GEOSYNCHRONOUS SATELLITE
CN110545136B (en) * 2019-07-31 2021-11-23 上海众睿通信科技有限公司 Method for estimating and compensating uplink carrier frequency offset of low-orbit satellite multi-carrier communication system
CN110798422B (en) * 2019-11-25 2022-01-07 成都天奥集团有限公司 Low earth orbit satellite multi-carrier communication system downlink sampling frequency offset estimation and compensation method

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 (en) * 1986-03-15 1987-09-21 Nec Corp Synchronization control system
EP0337269B1 (en) * 1988-04-14 1994-03-30 ANT Nachrichtentechnik GmbH Method and arrangement for reducing frequency-deviations in a mobile satellite communication
JP3033176B2 (en) * 1990-10-19 2000-04-17 日本電気株式会社 AFC device for satellite communication earth station
FR2681995B1 (en) * 1991-10-01 1993-12-10 Alcatel Espace METHOD FOR FALLING TRAFFIC IN A LOW ORBIT SATELLITE COMMUNICATION SYSTEM FOR TERMINALS AND COMMUNICATION SYSTEM IMPLEMENTING SUCH A METHOD.
JPH06244763A (en) * 1993-02-19 1994-09-02 Matsushita Electric Ind Co Ltd Satellite communication equipment
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
CA2267169A1 (en) 1998-04-09
KR100791824B1 (en) 2008-01-04
CN1238866A (en) 1999-12-15
AU4654397A (en) 1998-04-24
TW448646B (en) 2001-08-01
AU719962B2 (en) 2000-05-18
WO1998015071A1 (en) 1998-04-09
JP2009201143A (en) 2009-09-03
EP0929949A1 (en) 1999-07-21
KR20000049034A (en) 2000-07-25
CN1140068C (en) 2004-02-25
JP2001501419A (en) 2001-01-30

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