BR9815806A - Método e aparelho para sincronização grosseira de frequência - Google Patents
Método e aparelho para sincronização grosseira de frequênciaInfo
- Publication number
- BR9815806A BR9815806A BR9815806-6A BR9815806A BR9815806A BR 9815806 A BR9815806 A BR 9815806A BR 9815806 A BR9815806 A BR 9815806A BR 9815806 A BR9815806 A BR 9815806A
- Authority
- BR
- Brazil
- Prior art keywords
- deviation
- frequency
- carrier frequency
- envelope
- signal
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/261—Details of reference signals
- H04L27/2613—Structure of the reference signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2657—Carrier synchronisation
- H04L27/2659—Coarse or integer frequency offset determination and synchronisation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2668—Details of algorithms
- H04L27/2673—Details of algorithms characterised by synchronisation parameters
- H04L27/2675—Pilot or known symbols
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
- H04L2027/0024—Carrier regulation at the receiver end
- H04L2027/0026—Correction of carrier offset
- H04L2027/003—Correction of carrier offset at baseband only
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
<B>MéTODO E APARELHO PARA SINCRONIZAçãO GROSSEIRA DE FREQuêNCIA<D> Para realizar uma sincronização grosseira de freq³ência para compensar um desvio de freq³ência de portadora a partir de uma freq³ência de oscilador em um sistema de desmodulação (130) capaz de desmodular um sinal que tenha uma estrutura de quadro, a estrutura de quadro compreendendo pelo menos um símbolo útil (162) e um símbolo de referência (166) que é uma seq³ência modulada por amplitude, primeiramente o sinal é recebido. Em seguida, o sinal recebido é convertido descendentemente. Depois é realizada uma desmodulação de amplitude do sinal convertido descendentemente com a finalidade de gerar um envelope. Este envelope é correlacionado com um padrão predeterminado de referência com a finalidade de determinar o desvio de freq³ência de portadora. Finalmente, a freq³ência de oscilar é controlada com base no desvio de freq³ência de portadora. O símbolo de referência pode compreender duas seq³ências idênticas (300). Neste caso, o envelope obtido pela desmodulação de amplitude tem duas porções que são baseadas nas seq³ências idênticas (300). Uma das porções do envelope está correlacionada com a outra das porções com a finalidade de determinar o desvio de freq³ência de portadora. A freq³ência de oscilador é controlada com base no desvio de freq³ência de portadora determinado.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP1998/002170 WO1999053666A1 (en) | 1998-04-14 | 1998-04-14 | Coarse frequency synchronisation in multicarrier systems |
Publications (1)
Publication Number | Publication Date |
---|---|
BR9815806A true BR9815806A (pt) | 2000-11-28 |
Family
ID=8166939
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR9815806-6A BR9815806A (pt) | 1998-04-14 | 1998-04-14 | Método e aparelho para sincronização grosseira de frequência |
Country Status (19)
Country | Link |
---|---|
US (1) | US6993094B1 (pt) |
EP (1) | EP1072137B1 (pt) |
JP (1) | JP3429747B2 (pt) |
KR (1) | KR100347965B1 (pt) |
CN (1) | CN1112794C (pt) |
AP (1) | AP2000001928A0 (pt) |
AT (1) | ATE207681T1 (pt) |
AU (1) | AU749787B2 (pt) |
BR (1) | BR9815806A (pt) |
CA (1) | CA2328169C (pt) |
DE (1) | DE69802212T2 (pt) |
DK (1) | DK1072137T3 (pt) |
EA (1) | EA002529B1 (pt) |
ES (1) | ES2166161T3 (pt) |
HK (1) | HK1036710A1 (pt) |
PT (1) | PT1072137E (pt) |
TW (1) | TW417370B (pt) |
WO (1) | WO1999053666A1 (pt) |
ZA (1) | ZA983645B (pt) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE9801748L (sv) * | 1998-05-18 | 1999-11-19 | Telia Ab | Förbättringar i eller som hänför sig till telekommunikationsöverföringssystem |
EP1901461A3 (en) * | 1999-10-22 | 2008-05-21 | Nextnet Wireless Inc. | Data packet delivery with a framed downlink and an unframed uplink |
US6760365B2 (en) * | 2001-10-11 | 2004-07-06 | Interdigital Technology Corporation | Acquisition circuit for low chip rate option for mobile telecommunication system |
JP4203008B2 (ja) * | 2002-04-30 | 2008-12-24 | 株式会社アドバンテスト | パターン位置検出装置、方法、プログラムおよび該プログラムを記録した記録媒体 |
US7333573B2 (en) * | 2002-08-23 | 2008-02-19 | Hitachi Kokusai Electric Inc. | Radio communication apparatus and method having automatic frequency control function |
CN1768501A (zh) * | 2003-03-31 | 2006-05-03 | 松下电器产业株式会社 | 频率同步设备和频率同步方法 |
JP2005136555A (ja) * | 2003-10-29 | 2005-05-26 | Advantest Corp | シンボル点推定装置、方法、プログラムおよび記録媒体 |
US7515657B1 (en) * | 2004-03-05 | 2009-04-07 | Marvell International Ltd. | Frequency tracking for OFDM transmission over frequency selective channels |
CN1707980B (zh) * | 2004-06-11 | 2010-12-08 | 联芯科技有限公司 | 收发信机与仪器之间信号同步的方法及系统 |
US7606331B2 (en) * | 2005-05-11 | 2009-10-20 | Nokia Corporation | Frequency offset compensation in radio receiver |
KR100962222B1 (ko) | 2005-09-06 | 2010-06-14 | 니폰덴신뎅와 가부시키가이샤 | 무선 송신 장치와 무선 수신 장치 및 무선 송신 방법과무선 수신 방법 및 무선 통신 시스템과 무선 통신 방법 |
US9608780B2 (en) * | 2008-09-23 | 2017-03-28 | Qualcomm Incorporated | Transmit diversity for SC-FDMA |
JP5337258B2 (ja) | 2010-01-22 | 2013-11-06 | 株式会社東芝 | 無線送受信システム、方法、およびmri装置 |
US20110228822A1 (en) * | 2010-03-16 | 2011-09-22 | Harris Corporation, Corporation Of The State Of Delaware | Spectral smoothing wireless communications device and associated methods |
US9491024B2 (en) * | 2015-02-04 | 2016-11-08 | Hong Kong Applied Science And Technology Research Institute Co., Ltd. | Methods for frequency offset estimation with Zadoff-Chu sequences |
CN111163027B (zh) * | 2019-12-26 | 2022-05-31 | 哈尔滨海能达科技有限公司 | 同步检测方法及装置 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5444697A (en) * | 1993-08-11 | 1995-08-22 | The University Of British Columbia | Method and apparatus for frame synchronization in mobile OFDM data communication |
JP3074103B2 (ja) * | 1993-11-16 | 2000-08-07 | 株式会社東芝 | Ofdm同期復調回路 |
US5594757A (en) * | 1994-07-28 | 1997-01-14 | Motorola, Inc. | Method and apparatus for digital automatic frequency control |
JP3419567B2 (ja) * | 1994-11-08 | 2003-06-23 | アンリツ株式会社 | デジタル信号のシンボル識別点検出回路 |
US5717722A (en) * | 1994-11-08 | 1998-02-10 | Anritsu Corporation | Precision symbol demodulation system for multi-carrier modulation signal |
JP3124717B2 (ja) | 1995-01-10 | 2001-01-15 | 松下電器産業株式会社 | 直交周波数分割多重信号の伝送方法およびその受信装置 |
US5732113A (en) * | 1996-06-20 | 1998-03-24 | Stanford University | Timing and frequency synchronization of OFDM signals |
US6359938B1 (en) * | 1996-10-31 | 2002-03-19 | Discovision Associates | Single chip VLSI implementation of a digital receiver employing orthogonal frequency division multiplexing |
JPH10243033A (ja) * | 1997-02-28 | 1998-09-11 | Oki Electric Ind Co Ltd | 復調装置 |
US6058101A (en) * | 1997-06-11 | 2000-05-02 | Industrial Technology Research Institute | Synchronization method and system for a digital receiver |
US5991289A (en) * | 1997-08-05 | 1999-11-23 | Industrial Technology Research Institute | Synchronization method and apparatus for guard interval-based OFDM signals |
-
1998
- 1998-04-14 JP JP2000544108A patent/JP3429747B2/ja not_active Expired - Fee Related
- 1998-04-14 CA CA002328169A patent/CA2328169C/en not_active Expired - Fee Related
- 1998-04-14 CN CN98814040A patent/CN1112794C/zh not_active Expired - Lifetime
- 1998-04-14 US US09/673,265 patent/US6993094B1/en not_active Expired - Lifetime
- 1998-04-14 BR BR9815806-6A patent/BR9815806A/pt not_active IP Right Cessation
- 1998-04-14 DK DK98920519T patent/DK1072137T3/da active
- 1998-04-14 ES ES98920519T patent/ES2166161T3/es not_active Expired - Lifetime
- 1998-04-14 AT AT98920519T patent/ATE207681T1/de not_active IP Right Cessation
- 1998-04-14 EA EA200001067A patent/EA002529B1/ru not_active IP Right Cessation
- 1998-04-14 KR KR1020007011426A patent/KR100347965B1/ko not_active IP Right Cessation
- 1998-04-14 PT PT98920519T patent/PT1072137E/pt unknown
- 1998-04-14 DE DE69802212T patent/DE69802212T2/de not_active Expired - Fee Related
- 1998-04-14 AP APAP/P/2000/001928A patent/AP2000001928A0/en unknown
- 1998-04-14 AU AU73350/98A patent/AU749787B2/en not_active Ceased
- 1998-04-14 EP EP98920519A patent/EP1072137B1/en not_active Expired - Lifetime
- 1998-04-14 WO PCT/EP1998/002170 patent/WO1999053666A1/en active IP Right Grant
- 1998-04-30 ZA ZA983645A patent/ZA983645B/xx unknown
- 1998-08-05 TW TW087112879A patent/TW417370B/zh not_active IP Right Cessation
-
2001
- 2001-10-31 HK HK01107447A patent/HK1036710A1/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DK1072137T3 (da) | 2002-02-11 |
AP2000001928A0 (en) | 2000-09-30 |
ATE207681T1 (de) | 2001-11-15 |
TW417370B (en) | 2001-01-01 |
DE69802212D1 (de) | 2001-11-29 |
CN1112794C (zh) | 2003-06-25 |
JP3429747B2 (ja) | 2003-07-22 |
PT1072137E (pt) | 2002-04-29 |
WO1999053666A8 (en) | 2000-08-10 |
CN1292963A (zh) | 2001-04-25 |
JP2002511710A (ja) | 2002-04-16 |
US6993094B1 (en) | 2006-01-31 |
CA2328169A1 (en) | 1999-10-21 |
AU7335098A (en) | 1999-11-01 |
EP1072137B1 (en) | 2001-10-24 |
AU749787B2 (en) | 2002-07-04 |
CA2328169C (en) | 2003-08-12 |
DE69802212T2 (de) | 2002-06-27 |
EA002529B1 (ru) | 2002-06-27 |
ES2166161T3 (es) | 2002-04-01 |
EA200001067A1 (ru) | 2001-06-25 |
EP1072137A1 (en) | 2001-01-31 |
WO1999053666A1 (en) | 1999-10-21 |
KR100347965B1 (ko) | 2002-08-09 |
ZA983645B (en) | 1998-11-04 |
KR20010042707A (ko) | 2001-05-25 |
HK1036710A1 (en) | 2002-01-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
B08F | Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette] |
Free format text: REFERENTE A 7,8 E 9A ANUIDADES |
|
B08K | Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette] |
Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 1910 DE 14/08/2007. |