TW448646B - 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 PDFInfo
- Publication number
- TW448646B TW448646B TW086114248A TW86114248A TW448646B TW 448646 B TW448646 B TW 448646B TW 086114248 A TW086114248 A TW 086114248A TW 86114248 A TW86114248 A TW 86114248A TW 448646 B TW448646 B TW 448646B
- Authority
- TW
- Taiwan
- Prior art keywords
- signal
- satellite
- frequency
- timing
- gateway
- Prior art date
Links
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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)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US72349096A | 1996-09-30 | 1996-09-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| TW448646B true TW448646B (en) | 2001-08-01 |
Family
ID=24906496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW086114248A TW448646B (en) | 1996-09-30 | 1998-03-21 | Method and apparatus for precorrecting timing and frequency in communication systems |
Country Status (9)
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI385933B (zh) * | 2008-06-20 | 2013-02-11 | Hon Hai Prec Ind Co Ltd | 中頻訊號損耗補償電路 |
Families Citing this family (15)
| 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 |
| 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)
| 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 |
-
1997
- 1997-09-22 ZA ZA9708516A patent/ZA978516B/xx unknown
- 1997-09-26 EP EP97945314A patent/EP0929949A1/en not_active Withdrawn
- 1997-09-26 JP JP10516703A patent/JP2001501419A/ja not_active Withdrawn
- 1997-09-26 CA CA002267169A patent/CA2267169A1/en not_active Abandoned
- 1997-09-26 KR KR1019997003102A patent/KR100791824B1/ko not_active Expired - Fee Related
- 1997-09-26 AU AU46543/97A patent/AU719962B2/en not_active Ceased
- 1997-09-26 WO PCT/US1997/017380 patent/WO1998015071A1/en active Application Filing
- 1997-09-26 CN CNB971801703A patent/CN1140068C/zh not_active Expired - Fee Related
-
1998
- 1998-03-21 TW TW086114248A patent/TW448646B/zh not_active IP Right Cessation
-
2009
- 2009-05-07 JP JP2009112965A patent/JP2009201143A/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI385933B (zh) * | 2008-06-20 | 2013-02-11 | Hon Hai Prec Ind Co Ltd | 中頻訊號損耗補償電路 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20000049034A (ko) | 2000-07-25 |
| 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 |
| ZA978516B (en) | 1998-06-10 |
| JP2009201143A (ja) | 2009-09-03 |
| AU719962B2 (en) | 2000-05-18 |
| CN1140068C (zh) | 2004-02-25 |
| CA2267169A1 (en) | 1998-04-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GD4A | Issue of patent certificate for granted invention patent | ||
| MM4A | Annulment or lapse of patent due to non-payment of fees |