KR950004792A - 디지탈 복조 장치 및 디지탈 복조방법 - Google Patents
디지탈 복조 장치 및 디지탈 복조방법 Download PDFInfo
- Publication number
- KR950004792A KR950004792A KR1019940018621A KR19940018621A KR950004792A KR 950004792 A KR950004792 A KR 950004792A KR 1019940018621 A KR1019940018621 A KR 1019940018621A KR 19940018621 A KR19940018621 A KR 19940018621A KR 950004792 A KR950004792 A KR 950004792A
- Authority
- KR
- South Korea
- Prior art keywords
- signal
- demodulation
- orthogonal frequency
- clock
- carrier
- 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.)
- Abandoned
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/04—Frequency-transposition arrangements
- H04J1/05—Frequency-transposition arrangements using digital techniques
-
- 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
- H04L27/2662—Symbol 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
- H04L27/2657—Carrier 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
- H04L27/26—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
- H04L27/2676—Blind, i.e. without using known symbols
- H04L27/2679—Decision-aided
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
Description
Claims (5)
- 직교 주파수 다중신호를 복조하는 장치로서 복조수단 및 클록재생수단을 구비하고, 상기한 복조수단은 이 직교 주파수 다중신호를 수신하고 복조하여 복조신호로 만들고, 상기 클록제어수단은, 이 클록재생수단이 재생하여 이 직교 주파수 다중신호의 복조 처리에 사용되는 클록신호및 상기 복조신호내의 직교 주파수 다중신호에 포함되는 소정의 반송파 신호에 대응하는 복조신호의 신호 성분의 위상차에 의거해서 클록신호의 주파수를 제어하는 것을 특징으로 하는 디지탈 복조장치.
- 제1항에 있어서, 상기 복조수단은 상기 직교 주파수 변조신호를 거쳐 대역 신호로 변환하기 위한 재생 반송파 신호를 재생하는 반송파 신호재생수단을 더 구비하고, 이 반송파 신호재생수단은 상기 복조신호안의 ; 상기 클록신호의 재생에 사용되는 신호 성분에 대응하는 반송파 신호 이외의 소정의 반송파 신호에 대응하는 복조신호의 신호 성분 및 이 재생반송파 신호와의 위상차에 의거해서 이 반송파 신호의 주파수를 제어하는 것을 특징으로 하는 디지탈 복조장치.
- 제 1항 또는 제2항에 있어서, 상기 위상차 검출은 코스타스 연산에 의해 행해지는 것을 특징으로 하는 디지탈 복조장치.
- 제 2항 또는 제 3항에 있어서, 상기 클록신호 및 재상 반송파의 재생에 사용되는 복조신호의 신호성분은 각각 이 직교 주파수 다중신호의 다른 반송파 신호에 대응하는 것임을 특징으로 하는 디지탈 복조장치.
- 직교 주파수 다중신호의 소정의 반송파 신호에 대응하는 이 직교 주파수 다중신호의 복조신호에 의거해서 이 직교 주파수 다중신호의 복조처리에 사용되는 클록신호를 재생하는 것을 특징으로 하는 디지탈 복조방법※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP93-186097 | 1993-07-28 | ||
| JP5186097A JPH0746218A (ja) | 1993-07-28 | 1993-07-28 | ディジタル復調装置 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR950004792A true KR950004792A (ko) | 1995-02-18 |
Family
ID=16182320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019940018621A Abandoned KR950004792A (ko) | 1993-07-28 | 1994-07-27 | 디지탈 복조 장치 및 디지탈 복조방법 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US5506836A (ko) |
| JP (1) | JPH0746218A (ko) |
| KR (1) | KR950004792A (ko) |
Families Citing this family (38)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE500986C2 (sv) * | 1993-07-20 | 1994-10-17 | Telia Ab | Förfarande och anordning för synkronisering i digitalt transmissionssystem av typen OFDM |
| US5675572A (en) * | 1993-07-28 | 1997-10-07 | Sony Corporation | Orthogonal frequency division multiplex modulation apparatus and orthogonal frequency division multiplex demodulation apparatus |
| JPH07250115A (ja) * | 1994-03-09 | 1995-09-26 | Toshiba Corp | デジタルデータ受信装置 |
| US5761190A (en) * | 1995-02-20 | 1998-06-02 | Pioneer Electronic Corporation | OFDM broadcast wave receiver |
| JP3130752B2 (ja) * | 1995-02-24 | 2001-01-31 | 株式会社東芝 | Ofdm伝送受信方式及び送受信装置 |
| JPH09307526A (ja) * | 1996-05-17 | 1997-11-28 | Mitsubishi Electric Corp | デジタル放送受信機 |
| US5732113A (en) * | 1996-06-20 | 1998-03-24 | Stanford University | Timing and frequency synchronization of OFDM signals |
| JP3289610B2 (ja) * | 1996-07-31 | 2002-06-10 | 日本ビクター株式会社 | Ofdm復調装置及びその方法 |
| CA2183140C (en) * | 1996-08-12 | 2001-11-20 | Telecommunications Research Laboratories | Ofdm timing and frequency recovery system |
| JP4130994B2 (ja) * | 1996-09-02 | 2008-08-13 | エステー マイクロエレクトロニクス ナームローゼ ベンノートシャップ | 多重搬送波伝送システムにおける、あるいはそれに関する改良 |
| FR2754125B1 (fr) * | 1996-09-30 | 2004-07-09 | Sc Reprosol | Dispositif et procede d'egalisation vectorielle d'un signal ofdm |
| SE9703629L (sv) * | 1997-03-03 | 1998-09-04 | Telia Ab | Förbättringar av, eller med avseende på, synkronisering |
| JP3726857B2 (ja) * | 1997-05-02 | 2005-12-14 | ソニー株式会社 | 受信装置および受信方法 |
| JP3797397B2 (ja) * | 1997-05-02 | 2006-07-19 | ソニー株式会社 | 受信装置および受信方法 |
| USRE43703E1 (en) * | 1997-09-04 | 2012-10-02 | Sony Deutschland Gmbh | Transmission system for OFDM-signals with optimized synchronization |
| DE19738780A1 (de) | 1997-09-04 | 1999-03-11 | Thomson Brandt Gmbh | Verfahren und Schaltungsanordnung zur Korrektur von Phasen- und/oder Frequenzfehlern digitaler Multicarrier-Signale |
| EP1713225B1 (en) * | 1997-09-04 | 2008-09-24 | Sony Deutschland Gmbh | Transmission system for OFDM-signals with optimised synchronisation |
| US6064645A (en) * | 1997-12-22 | 2000-05-16 | Trw Inc. | Bulk filtering and demodulation of independent FDMA sources |
| JP3084363B2 (ja) * | 1997-12-26 | 2000-09-04 | 株式会社ケンウッド | キャリア再生回路 |
| US6611493B1 (en) * | 1998-01-27 | 2003-08-26 | Hitachi Denshi Kabushiki Kaisha | Communication, transmission and receiving method and apparatus using orthogonal frequency division multiplexing modulation system |
| US6111919A (en) * | 1999-01-20 | 2000-08-29 | Intellon Corporation | Synchronization of OFDM signals |
| FR2788907B1 (fr) * | 1999-01-27 | 2001-04-13 | St Microelectronics Sa | Generation d'intervalle de garde dans une transmission en modulation dmt |
| US6539063B1 (en) | 1999-02-18 | 2003-03-25 | Ibiquity Digital Corporation | System and method for recovering symbol timing offset and carrier frequency error in an OFDM digital audio broadcast system |
| FR2790344B1 (fr) * | 1999-02-26 | 2001-05-18 | St Microelectronics Sa | Demodulateur cofdm avec compensation de deplacement de fenetre d'analyse fft |
| JP2000269917A (ja) * | 1999-03-12 | 2000-09-29 | Sony Corp | 送信装置および方法、並びに提供媒体 |
| US6074086A (en) * | 1999-04-26 | 2000-06-13 | Intellon Corporation | Synchronization of OFDM signals with improved windowing |
| US6269132B1 (en) | 1999-04-26 | 2001-07-31 | Intellon Corporation | Windowing function for maintaining orthogonality of channels in the reception of OFDM symbols |
| US6505037B1 (en) * | 1999-06-29 | 2003-01-07 | Sharp Laboratories Of America, Inc. | Data unit detection including antenna diversity |
| US6859504B1 (en) | 1999-06-29 | 2005-02-22 | Sharp Laboratories Of America, Inc. | Rapid settling automatic gain control with minimal signal distortion |
| FR2799597B1 (fr) * | 1999-10-08 | 2004-02-20 | Mitsubishi Electric Inf Tech | Procede de transmission de donnees sur porteuses multiples d'un emetteur a un recepteur et recepteur prevu pour la mise en oeuvre dudit procede |
| US6587526B1 (en) | 1999-10-12 | 2003-07-01 | Lucent Technologies Inc. | Apparatus and method for timing synchronization in OFDM-based wireless systems |
| US6631143B1 (en) * | 1999-11-12 | 2003-10-07 | Lucent Technologies Inc. | Methods and apparatus for frame synchronization in a digital audio broadcasting system |
| US6643343B1 (en) * | 2000-07-21 | 2003-11-04 | At&T Corp. | Timing recovery for DMT-based DSL modems |
| JP2002290367A (ja) * | 2001-03-26 | 2002-10-04 | Hitachi Kokusai Electric Inc | 帯域分割復調方法及びofdm受信機 |
| US7061854B2 (en) * | 2001-10-15 | 2006-06-13 | Nortel Networks Limited | Efficient OFDM communications with interference immunity |
| TWI302066B (en) * | 2006-04-26 | 2008-10-11 | Ind Tech Res Inst | Frequency acquisition and tracking circuit |
| JP2008310198A (ja) * | 2007-06-18 | 2008-12-25 | Konica Minolta Business Technologies Inc | 画像形成装置 |
| US20110110314A1 (en) * | 2009-11-09 | 2011-05-12 | Telefonaktiebolaget Lm Ericsson (Publ) | Multi-domain network coding |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5191576A (en) * | 1988-11-18 | 1993-03-02 | L'Etat Francais and Telediffusion de France S.A. | Method for broadcasting of digital data, notably for radio broadcasting at high throughput rate towards mobile receivers, with time frequency interlacing and analog synchronization |
| FR2658017B1 (fr) * | 1990-02-06 | 1992-06-05 | France Etat | Procede de diffusion de donnees numeriques, notamment pour la radiodiffusion a haut debit vers des mobiles, a entrelacement temps-frequence et aide a l'acquisition de la commande automatique de frequence, et recepteur correspondant. |
| JP2904986B2 (ja) * | 1992-01-31 | 1999-06-14 | 日本放送協会 | 直交周波数分割多重ディジタル信号送信装置および受信装置 |
-
1993
- 1993-07-28 JP JP5186097A patent/JPH0746218A/ja active Pending
-
1994
- 1994-07-27 KR KR1019940018621A patent/KR950004792A/ko not_active Abandoned
- 1994-07-27 US US08/281,169 patent/US5506836A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US5506836A (en) | 1996-04-09 |
| JPH0746218A (ja) | 1995-02-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PA0109 | Patent application |
Patent event code: PA01091R01D Comment text: Patent Application Patent event date: 19940727 |
|
| PG1501 | Laying open of application | ||
| A201 | Request for examination | ||
| PA0201 | Request for examination |
Patent event code: PA02012R01D Patent event date: 19990407 Comment text: Request for Examination of Application Patent event code: PA02011R01I Patent event date: 19940727 Comment text: Patent Application |
|
| E902 | Notification of reason for refusal | ||
| PE0902 | Notice of grounds for rejection |
Comment text: Notification of reason for refusal Patent event date: 20010627 Patent event code: PE09021S01D |
|
| E701 | Decision to grant or registration of patent right | ||
| PE0701 | Decision of registration |
Patent event code: PE07011S01D Comment text: Decision to Grant Registration Patent event date: 20020118 |
|
| NORF | Unpaid initial registration fee | ||
| PC1904 | Unpaid initial registration fee |