SE512623C2 - Förfarande och anordning i ett telekommunikationsproblem - Google Patents
Förfarande och anordning i ett telekommunikationsproblemInfo
- Publication number
- SE512623C2 SE512623C2 SE9704011A SE9704011A SE512623C2 SE 512623 C2 SE512623 C2 SE 512623C2 SE 9704011 A SE9704011 A SE 9704011A SE 9704011 A SE9704011 A SE 9704011A SE 512623 C2 SE512623 C2 SE 512623C2
- Authority
- SE
- Sweden
- Prior art keywords
- cartesian
- phase
- signals
- approximation
- equation
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C3/00—Angle modulation
- H03C3/02—Details
- H03C3/08—Modifications of modulator to linearise modulation, e.g. by feedback, and clearly applicable to more than one type of modulator
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/16—Multiple-frequency-changing
- H03D7/165—Multiple-frequency-changing at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature
- H03D7/166—Multiple-frequency-changing at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature using two or more quadrature frequency translation stages
- H03D7/168—Multiple-frequency-changing at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature using two or more quadrature frequency translation stages using a feedback loop containing mixers or demodulators
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
- H03F1/3223—Modifications of amplifiers to reduce non-linear distortion using feed-forward
- H03F1/3229—Modifications of amplifiers to reduce non-linear distortion using feed-forward using a loop for error extraction and another loop for error subtraction
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
- H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
- H03F1/3247—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits using feedback acting on predistortion circuits
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
- H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
- H03F1/3282—Acting on the phase and the amplitude of the input signal
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
- H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
- H03F1/3294—Acting on the real and imaginary components of the input signal
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
- H03F1/345—Negative-feedback-circuit arrangements with or without positive feedback using hybrid or directional couplers
-
- 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
- H04L27/367—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator using predistortion
- H04L27/368—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator using predistortion adaptive predistortion
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/57—Separate feedback of real and complex signals being present
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2201/00—Indexing scheme relating to details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements covered by H03F1/00
- H03F2201/32—Indexing scheme relating to modifications of amplifiers to reduce non-linear distortion
- H03F2201/3231—Adaptive predistortion using phase feedback from the output of the main amplifier
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Feedback Control In General (AREA)
- Amplifiers (AREA)
- Control Of Temperature (AREA)
- Centrifugal Separators (AREA)
- Control Of Ac Motors In General (AREA)
- Mobile Radio Communication Systems (AREA)
Priority Applications (12)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9704011A SE512623C2 (sv) | 1997-11-03 | 1997-11-03 | Förfarande och anordning i ett telekommunikationsproblem |
EEP200000280A EE04573B1 (et) | 1997-11-03 | 1998-11-03 | Meetod telekommunikatsioonissteemis Descartes`i kontrollssteemi kontrollahelas faasinihke kompenseerimiseks, arvutiprogrammitoode kasutamiseks koos Descartes`i kontrollssteemiga, faasiseadistaja Descartes`i kontrollssteemis ja Descartes`i kontrol |
AU10583/99A AU749268B2 (en) | 1997-11-03 | 1998-11-03 | Method and device in a telecommunication system |
DE69831874T DE69831874T2 (de) | 1997-11-03 | 1998-11-03 | Verfahren und vorrichtung in einem telkommunikationssystem |
JP2000519507A JP4016372B2 (ja) | 1997-11-03 | 1998-11-03 | 電気通信システムにおける方法及び装置 |
ARP980105521A AR017547A1 (es) | 1997-11-03 | 1998-11-03 | Un medio de control para una disposicion de control cartesiano de senales cartesianas de entrada y senales cartesianas de realimentacion detelecomunicaciones, un ajustador de fase para dicho medio de control, una disposicion de control cartesiano que incorpora dicho medio de control, y un metodopara |
KR1020007004811A KR100665455B1 (ko) | 1997-11-03 | 1998-11-03 | 전기통신 시스템에 있어서의 방법 및 장치 |
US09/184,973 US6351677B1 (en) | 1997-11-03 | 1998-11-03 | Method and device in a telecommunication system |
EP98953135A EP1027769B1 (en) | 1997-11-03 | 1998-11-03 | Method and device in a telecommunication system |
TW087118263A TW427054B (en) | 1997-11-03 | 1998-11-03 | Method and device in a telecommunication system |
CNB988128896A CN1168201C (zh) | 1997-11-03 | 1998-11-03 | 电信系统中的方法及装置 |
PCT/SE1998/001991 WO1999023756A1 (en) | 1997-11-03 | 1998-11-03 | Method and device in a telecommunication system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9704011A SE512623C2 (sv) | 1997-11-03 | 1997-11-03 | Förfarande och anordning i ett telekommunikationsproblem |
Publications (3)
Publication Number | Publication Date |
---|---|
SE9704011D0 SE9704011D0 (sv) | 1997-11-03 |
SE9704011L SE9704011L (sv) | 1999-05-04 |
SE512623C2 true SE512623C2 (sv) | 2000-04-10 |
Family
ID=20408840
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE9704011A SE512623C2 (sv) | 1997-11-03 | 1997-11-03 | Förfarande och anordning i ett telekommunikationsproblem |
Country Status (12)
Country | Link |
---|---|
US (1) | US6351677B1 (es) |
EP (1) | EP1027769B1 (es) |
JP (1) | JP4016372B2 (es) |
KR (1) | KR100665455B1 (es) |
CN (1) | CN1168201C (es) |
AR (1) | AR017547A1 (es) |
AU (1) | AU749268B2 (es) |
DE (1) | DE69831874T2 (es) |
EE (1) | EE04573B1 (es) |
SE (1) | SE512623C2 (es) |
TW (1) | TW427054B (es) |
WO (1) | WO1999023756A1 (es) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2352570B (en) | 1999-07-28 | 2003-12-24 | Wireless Systems Int Ltd | Distortion reduction |
SE519596C2 (sv) * | 1999-10-29 | 2003-03-18 | Ericsson Telefon Ab L M | Metod och apparat för att styra fasen i en lineariserad elektronisk förstärkare |
JP2002009557A (ja) * | 2000-06-21 | 2002-01-11 | Matsushita Electric Ind Co Ltd | 線形補償増幅装置 |
US6934341B2 (en) | 2000-08-29 | 2005-08-23 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for plurality signal generation |
US20030112896A1 (en) * | 2001-07-11 | 2003-06-19 | Raghavan Sreen A. | Multi-channel communications transceiver |
US7295623B2 (en) * | 2001-07-11 | 2007-11-13 | Vativ Technologies, Inc. | High-speed communications transceiver |
US7236757B2 (en) * | 2001-07-11 | 2007-06-26 | Vativ Technologies, Inc. | High-speed multi-channel communications transceiver with inter-channel interference filter |
EP1361655A1 (en) * | 2002-05-07 | 2003-11-12 | Semiconductor Ideas to The Market (ItoM) BV | Mirror suppression circuit in a quadrature demodulator |
US7010278B2 (en) * | 2002-10-25 | 2006-03-07 | Freescale Semiconductor, Inc. | Sideband suppression method and apparatus for quadrature modulator using magnitude measurements |
NZ524630A (en) * | 2003-03-07 | 2005-10-28 | Tait Electronics Ltd | Phase & envelope generation in an EER system |
DE10316559A1 (de) * | 2003-04-10 | 2004-11-18 | Rohde & Schwarz Ftk Gmbh | Rückkopplungslinearisierte Sendereinrichtung |
US7388904B2 (en) * | 2003-06-03 | 2008-06-17 | Vativ Technologies, Inc. | Near-end, far-end and echo cancellers in a multi-channel transceiver system |
US20050200408A1 (en) * | 2004-03-15 | 2005-09-15 | Benjamin James A. | Method and apparatus for feed forward linearization of wideband RF amplifiers |
US7382834B2 (en) * | 2004-05-06 | 2008-06-03 | Beceem Communications Inc. | Phase rotation estimation |
US7113037B2 (en) * | 2004-07-14 | 2006-09-26 | Raytheon Company | Performing remote power amplifier linearization |
DE102005002207A1 (de) * | 2004-11-26 | 2006-06-01 | Rohde & Schwarz Gmbh & Co. Kg | Verfahren und System zur Ermittlung der Amplitude und/oder Phase des Ausgangssignals eines Übertragungsgliedes in Abhängigkeit der Amplitude des Eingangsignals |
DE102005037880A1 (de) * | 2005-05-19 | 2006-11-23 | Rohde & Schwarz Gmbh & Co. Kg | Verfahren und System zur Ermittlung der Amplitude und/oder Phase des Ausgangssignals eines Übertragungsgliedes in Abhängigkeit der Amplitude des Eingangssignals |
JP4299819B2 (ja) * | 2005-08-17 | 2009-07-22 | 富士通株式会社 | 歪補償装置及び歪補償方法 |
US20070160168A1 (en) | 2006-01-11 | 2007-07-12 | Beukema Troy J | Apparatus and method for signal phase control in an integrated radio circuit |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4885551A (en) * | 1988-10-31 | 1989-12-05 | American Telephone And Telegraph Company At&T Bell Laboratories | Feed forward linear amplifier |
US4943783A (en) * | 1989-07-31 | 1990-07-24 | Nippon Telegraph And Telephone Corporation | Feed forward distortion correction circuit |
GB2238197A (en) | 1989-11-16 | 1991-05-22 | Motorola Inc | Feed-forward amplifier with amplitude and phase pre-correction |
US5134718A (en) | 1990-10-31 | 1992-07-28 | Motorola, Inc. | Fast phase shift adjusting method and device for linear transmitter |
GB9209982D0 (en) * | 1992-05-08 | 1992-06-24 | British Tech Group | Method and apparatus for amplifying modulating and demodulating |
SE470455B (sv) * | 1992-08-24 | 1994-04-11 | Ericsson Telefon Ab L M | Anordning för kompensering av fasvridningen i återkopplingsslingan vid en kartesiskt återkopplad effektförstärkare |
US5420536A (en) | 1993-03-16 | 1995-05-30 | Victoria University Of Technology | Linearized power amplifier |
GB9320078D0 (en) * | 1993-09-29 | 1993-11-17 | Linear Modulation Tech | Cartesian amplifier power control and related applications |
GB2293935B (en) | 1994-10-03 | 1999-07-14 | Linear Modulation Tech | Automatic calibration of carrier suppression and loop phase in a cartesian amplifier |
JP2967699B2 (ja) | 1995-03-06 | 1999-10-25 | 日本電気株式会社 | 送信装置 |
US5650758A (en) * | 1995-11-28 | 1997-07-22 | Radio Frequency Systems, Inc. | Pipelined digital predistorter for a wideband amplifier |
US5862460A (en) * | 1996-09-13 | 1999-01-19 | Motorola, Inc. | Power control circuit for a radio frequency transmitter |
-
1997
- 1997-11-03 SE SE9704011A patent/SE512623C2/sv not_active IP Right Cessation
-
1998
- 1998-11-03 AR ARP980105521A patent/AR017547A1/es unknown
- 1998-11-03 CN CNB988128896A patent/CN1168201C/zh not_active Expired - Fee Related
- 1998-11-03 KR KR1020007004811A patent/KR100665455B1/ko not_active IP Right Cessation
- 1998-11-03 DE DE69831874T patent/DE69831874T2/de not_active Expired - Lifetime
- 1998-11-03 WO PCT/SE1998/001991 patent/WO1999023756A1/en active IP Right Grant
- 1998-11-03 TW TW087118263A patent/TW427054B/zh not_active IP Right Cessation
- 1998-11-03 AU AU10583/99A patent/AU749268B2/en not_active Ceased
- 1998-11-03 US US09/184,973 patent/US6351677B1/en not_active Expired - Lifetime
- 1998-11-03 EE EEP200000280A patent/EE04573B1/xx not_active IP Right Cessation
- 1998-11-03 JP JP2000519507A patent/JP4016372B2/ja not_active Expired - Lifetime
- 1998-11-03 EP EP98953135A patent/EP1027769B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
AR017547A1 (es) | 2001-09-12 |
WO1999023756A1 (en) | 1999-05-14 |
EE200000280A (et) | 2001-08-15 |
KR20010031746A (ko) | 2001-04-16 |
JP4016372B2 (ja) | 2007-12-05 |
EP1027769B1 (en) | 2005-10-12 |
CN1168201C (zh) | 2004-09-22 |
KR100665455B1 (ko) | 2007-01-04 |
TW427054B (en) | 2001-03-21 |
DE69831874D1 (de) | 2006-02-23 |
DE69831874T2 (de) | 2006-07-27 |
SE9704011D0 (sv) | 1997-11-03 |
AU749268B2 (en) | 2002-06-20 |
AU1058399A (en) | 1999-05-24 |
EE04573B1 (et) | 2005-12-15 |
CN1285974A (zh) | 2001-02-28 |
EP1027769A1 (en) | 2000-08-16 |
JP2001522188A (ja) | 2001-11-13 |
US6351677B1 (en) | 2002-02-26 |
SE9704011L (sv) | 1999-05-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NUG | Patent has lapsed |