CA2406757C - 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
- CA2406757C CA2406757C CA002406757A CA2406757A CA2406757C CA 2406757 C CA2406757 C CA 2406757C CA 002406757 A CA002406757 A CA 002406757A CA 2406757 A CA2406757 A CA 2406757A CA 2406757 C CA2406757 C CA 2406757C
- Authority
- CA
- Canada
- Prior art keywords
- filter
- symbol
- peak reduction
- spread spectrum
- set out
- 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.)
- Expired - Fee Related
Links
- 230000009467 reduction Effects 0.000 title claims abstract description 219
- 238000001228 spectrum Methods 0.000 title claims abstract description 102
- 238000004891 communication Methods 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000012545 processing Methods 0.000 claims abstract description 64
- 238000005316 response function Methods 0.000 claims abstract description 52
- 230000000694 effects Effects 0.000 claims abstract description 18
- 238000005070 sampling Methods 0.000 claims description 41
- 238000001914 filtration Methods 0.000 claims description 28
- 238000004364 calculation method Methods 0.000 claims description 18
- 230000010267 cellular communication Effects 0.000 claims description 10
- 230000003111 delayed effect Effects 0.000 claims description 10
- 230000007480 spreading Effects 0.000 claims description 8
- 238000003892 spreading Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 4
- 241000272470 Circus Species 0.000 claims description 2
- 230000001360 synchronised effect Effects 0.000 claims 1
- 239000013598 vector Substances 0.000 description 41
- 230000001413 cellular effect Effects 0.000 description 32
- 238000012937 correction Methods 0.000 description 14
- 238000013459 approach Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 10
- 238000011946 reduction process Methods 0.000 description 10
- 230000001629 suppression Effects 0.000 description 10
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- 230000004044 response Effects 0.000 description 8
- 230000003595 spectral effect Effects 0.000 description 7
- 230000001364 causal effect Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000003321 amplification Effects 0.000 description 5
- 238000003199 nucleic acid amplification method Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 3
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 3
- 102100028701 General vesicular transport factor p115 Human genes 0.000 description 2
- 101000767151 Homo sapiens General vesicular transport factor p115 Proteins 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/10—Code generation
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- 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
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
- H04W52/36—Transmission power control [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 CA2406757A1 (fr) | 2001-11-01 |
| CA2406757C true 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 CA CA002406757A patent/CA2406757C/fr not_active Expired - Fee Related
- 2001-02-28 AU AU2001241825A patent/AU2001241825A1/en not_active Abandoned
- 2001-02-28 CN CNB018082831A patent/CN1284345C/zh not_active Expired - Fee Related
- 2001-02-28 KR KR10-2002-7014082A patent/KR100466057B1/ko not_active IP Right Cessation
- 2001-02-28 EP EP01913130A patent/EP1281262A4/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| CA2406757A1 (fr) | 2001-11-01 |
| CN1425242A (zh) | 2003-06-18 |
| EP1281262A4 (fr) | 2008-09-10 |
| EP1281262A1 (fr) | 2003-02-05 |
| AU2001241825A1 (en) | 2001-11-07 |
| KR100466057B1 (ko) | 2005-01-13 |
| KR20020089512A (ko) | 2002-11-29 |
| CN1284345C (zh) | 2006-11-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20190228 |
|
| MKLA | Lapsed |
Effective date: 20190228 |