CA2406757A1 - Systeme et procede de reduction de puissance de crete dans des systemes de communications a spectre etale - Google Patents
Systeme et procede de reduction de puissance de crete dans des systemes de communications a spectre etale Download PDFInfo
- Publication number
- CA2406757A1 CA2406757A1 CA002406757A CA2406757A CA2406757A1 CA 2406757 A1 CA2406757 A1 CA 2406757A1 CA 002406757 A CA002406757 A CA 002406757A CA 2406757 A CA2406757 A CA 2406757A CA 2406757 A1 CA2406757 A1 CA 2406757A1
- Authority
- CA
- Canada
- Prior art keywords
- filter
- peak reduction
- spread spectrum
- input symbols
- signal
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/10—Code generation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03343—Arrangements at the transmitter end
-
- 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
- H04L27/2614—Peak power aspects
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/36—Modulator circuits; Transmitter circuits
- H04L27/366—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
- H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
- H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
- H04B2201/70706—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation with means for reducing the peak-to-average power ratio
-
- 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
- H04L27/2614—Peak power aspects
- H04L27/2621—Reduction thereof using phase offsets between subcarriers
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Mobile Radio Communication Systems (AREA)
- Transmitters (AREA)
Abstract
L'invention concerne un système et un procédé permettant de réduire une crête de signal dans un système de communications à spectre étalé du type comprenant un filtre destiné à limiter une largeur de bande de symboles de signaux émis à partir dudit système. Une unité de réduction (122) de crête de signal est placée devant le filtre (126) qui comprend un prédicteur de filtre (146) prédisant l'effet dudit filtre sur les symboles de sortie à l'aide de valeurs de coefficients de filtre correspondant à une fonction de réponse d'impulsion de filtre. Des symboles d'entrée prévus de façon à amener le signal de sortie à dépasser une valeur de crête prédéterminée sont réglés. L'invention concerne également plusieurs exemples d'algorithmes appropriés pour calculer la réduction de crête nécessaire à appliquer aux symboles d'entrée. L'unité de réduction de crête fournit des symboles réglés au filtre destinés à être traités et émis en sortie par le système de communications.
Applications Claiming Priority (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US19851600P | 2000-04-19 | 2000-04-19 | |
US60/198,516 | 2000-04-19 | ||
US21289200P | 2000-06-20 | 2000-06-20 | |
US60/212,892 | 2000-06-20 | ||
US09/746,167 | 2000-12-22 | ||
US09/746,167 US6449302B2 (en) | 2000-04-19 | 2000-12-22 | System and method for peak power reduction in spread spectrum communications systems |
PCT/US2001/006317 WO2001082547A1 (fr) | 2000-04-19 | 2001-02-28 | Systeme et procede de reduction de puissance de crete dans des systemes de communications a spectre etale |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2406757A1 true CA2406757A1 (fr) | 2001-11-01 |
CA2406757C CA2406757C (fr) | 2004-03-23 |
Family
ID=27393889
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002406757A Expired - Fee Related CA2406757C (fr) | 2000-04-19 | 2001-02-28 | Systeme et procede de reduction de puissance de crete dans des systemes de communications a spectre etale |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1281262A4 (fr) |
KR (1) | KR100466057B1 (fr) |
CN (1) | CN1284345C (fr) |
AU (1) | AU2001241825A1 (fr) |
CA (1) | CA2406757C (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4287225B2 (ja) * | 2003-09-18 | 2009-07-01 | 株式会社日立国際電気 | 送信機 |
JP4871813B2 (ja) * | 2007-08-28 | 2012-02-08 | 株式会社日立製作所 | 無線通信装置、無線通信方法及びピーク抑圧方法 |
GB2483290B (en) * | 2010-09-03 | 2015-07-22 | Nvidia Technology Uk Ltd | Transmitting a signal from a power amplifier |
EP2940866B1 (fr) | 2014-04-30 | 2021-12-08 | Nxp B.V. | Circuit de commutation RF |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5418813A (en) * | 1993-12-06 | 1995-05-23 | Motorola, Inc. | Method and apparatus for creating a composite waveform |
US6049535A (en) * | 1996-06-27 | 2000-04-11 | Interdigital Technology Corporation | Code division multiple access (CDMA) communication system |
JP3311950B2 (ja) * | 1996-12-19 | 2002-08-05 | 富士通株式会社 | 符号多重無線装置 |
JP3462388B2 (ja) * | 1998-04-28 | 2003-11-05 | 松下電器産業株式会社 | 無線通信装置 |
-
2001
- 2001-02-28 KR KR10-2002-7014082A patent/KR100466057B1/ko not_active IP Right Cessation
- 2001-02-28 AU AU2001241825A patent/AU2001241825A1/en not_active Abandoned
- 2001-02-28 EP EP01913130A patent/EP1281262A4/fr not_active Withdrawn
- 2001-02-28 CN CNB018082831A patent/CN1284345C/zh not_active Expired - Fee Related
- 2001-02-28 CA CA002406757A patent/CA2406757C/fr not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CA2406757C (fr) | 2004-03-23 |
EP1281262A4 (fr) | 2008-09-10 |
KR20020089512A (ko) | 2002-11-29 |
EP1281262A1 (fr) | 2003-02-05 |
CN1284345C (zh) | 2006-11-08 |
AU2001241825A1 (en) | 2001-11-07 |
CN1425242A (zh) | 2003-06-18 |
KR100466057B1 (ko) | 2005-01-13 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2001099293A3 (fr) | Systeme et procede de reduction de puissance de crete dans les systemes de communications a porteuses multiples | |
MY130207A (en) | Method and apparatus for power estimation in a communication system. | |
KR950007328A (ko) | 직접 시퀸스 코드분할 다중 액세스 통신 시스템 및 그 시스템용 수신기 | |
WO2004036811A3 (fr) | Procede et dispositif de suppression d'interferences par inversion matricielle efficace dans un systeme a acces multiple par code de repartition a sequence directe | |
HUP0301050A2 (hu) | Integrált biztonsági és kommunikációs rendszer, valamint eljárás biztonságos kommunikációs vonallal | |
MY124192A (en) | Variable bandwidth spread spectrum device | |
CA2452349A1 (fr) | Systeme et procede de post-filtrage de reduction de puissance de crete dans des systemes de communications a ondes porteuses multiples | |
EP0729254A3 (fr) | Procédé et circuits d'égalisation à espacement fractionné | |
TW332280B (en) | Apparatus for compressing a digital input signal | |
AU4320197A (en) | Frequency-voltage conversion circuit, delay amount judgement circuit, system having frequency-voltage conversion circuit, method of adjusting input/output characterictics of frequency-voltage conversion circuit, and apparatus for automatically adjusting input/output | |
MXPA03006667A (es) | Metodo y dispositivo de reduccion de ruido. | |
ATE329439T1 (de) | Vorverzerrung zur korrektur von nichtlinearitäten sowie von gruppenlaufzeit bei satellitenkommunikation | |
IL155629A0 (en) | Method and apparatus for reducing transmission power in a high data rate system | |
WO2004095760A3 (fr) | Systemes et procedes de traitement de donnees audio utilisant des frequences de surechantillonnage elevees | |
AU2001252567A1 (en) | Matched filter and receiver for mobile radio communication system | |
CA2406757A1 (fr) | Systeme et procede de reduction de puissance de crete dans des systemes de communications a spectre etale | |
CA2220507A1 (fr) | Systeme de transmission de donnees possedant un rapport de puissance bas de valeur de crete/valeur moyenne se basant sur la distorsion de signaux apparaissant frequemment | |
TW355892B (en) | An apparatus and a method for a telecommunication system | |
WO1997016027A3 (fr) | Systeme et procede de codage d'un signal video ultrasonore | |
JPS6393233A (ja) | スペクトル拡散通信システム | |
JP3702829B2 (ja) | ピークファクタ低減装置 | |
WO2003039060A3 (fr) | Appareil et procede destines a generer un seuil d'eminceur adaptatif pour donnees binaires | |
TW200420011A (en) | Insertion sorter | |
WO2004040789A3 (fr) | Recepteur de filtre en cascade destine a des systemes de communication a acces multiples par repartition de code a sequence continue (ds-cdma) | |
EP1265374A3 (fr) | Procédé et dispositif de traitement de signal dans un récepteur de radiocommunication à étalement de spectre |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |
Effective date: 20190228 |
|
MKLA | Lapsed |
Effective date: 20190228 |