BR9901015A - Método para controle adaptativo de dispositivos de linearização de amplificador. - Google Patents
Método para controle adaptativo de dispositivos de linearização de amplificador.Info
- Publication number
- BR9901015A BR9901015A BR9901015-1A BR9901015A BR9901015A BR 9901015 A BR9901015 A BR 9901015A BR 9901015 A BR9901015 A BR 9901015A BR 9901015 A BR9901015 A BR 9901015A
- Authority
- BR
- Brazil
- Prior art keywords
- adaptive control
- amplifiers
- amplifier
- linearized
- intermodulation products
- 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
- H03F1/32—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
- 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
- H04B1/62—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 for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
<B>MéTODO PARA CONTROLE ADAPTATIVO DE DISPOSITIVOS DE LINEARIZAçãO DE AMPLIFICADOR<D>. A presente invenção é um método para linearização de amplificadores através da medição dos produtos de intermodulação na saída do amplificador linearizado usando intermodulação na saída do amplificador linearizado usando hardware adicional mínimo sem os problemas de desempenho associados ao tom-piloto. Em uma modalidade, os amplificadores são linearizados adaptativamente usando rádios de monitoração de desempenho. Especificamente, os rádios de monitoração de desempenho são usados para medir os níveis de sinal dos produtos de intermodulação em canais de comunicação não usados. Tais medições são então usadas para linearizar adaptativamente os amplificadores e reduzir os níveis de produtos de intermodulação.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/052,833 US6160996A (en) | 1998-03-31 | 1998-03-31 | Method for adaptively controlling amplifier linearization devices |
Publications (1)
Publication Number | Publication Date |
---|---|
BR9901015A true BR9901015A (pt) | 2000-01-18 |
Family
ID=21980191
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR9901015-1A BR9901015A (pt) | 1998-03-31 | 1999-03-17 | Método para controle adaptativo de dispositivos de linearização de amplificador. |
Country Status (9)
Country | Link |
---|---|
US (1) | US6160996A (pt) |
EP (1) | EP0948131B1 (pt) |
JP (1) | JP3396643B2 (pt) |
KR (1) | KR100641527B1 (pt) |
CN (1) | CN1118132C (pt) |
BR (1) | BR9901015A (pt) |
CA (1) | CA2261431C (pt) |
DE (1) | DE69901069T2 (pt) |
TW (1) | TW423232B (pt) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6112059A (en) * | 1997-11-12 | 2000-08-29 | Motorola, Inc. | Off-channel leakage power monitor apparatus and method |
US6628956B2 (en) * | 1999-03-15 | 2003-09-30 | Telefonaktiebolaget Lm Ericsson (Publ) | Adaptive power control in a radio communications systems |
JP4634557B2 (ja) * | 1999-11-30 | 2011-02-16 | 富士通株式会社 | 信号キャンセル方法及びその装置 |
US20020146996A1 (en) * | 2001-03-06 | 2002-10-10 | Bachman Thomas A. | Scanning receiver for use in power amplifier linearization |
US6829471B2 (en) | 2001-03-07 | 2004-12-07 | Andrew Corporation | Digital baseband receiver in a multi-carrier power amplifier |
US7403573B2 (en) | 2003-01-15 | 2008-07-22 | Andrew Corporation | Uncorrelated adaptive predistorter |
US7729668B2 (en) | 2003-04-03 | 2010-06-01 | Andrew Llc | Independence between paths that predistort for memory and memory-less distortion in power amplifiers |
US7123086B2 (en) * | 2003-05-07 | 2006-10-17 | Powerwave Technologies, Inc. | Feed forward amplifier employing positive feedback pilot generation |
US7259630B2 (en) | 2003-07-23 | 2007-08-21 | Andrew Corporation | Elimination of peak clipping and improved efficiency for RF power amplifiers with a predistorter |
US6963242B2 (en) | 2003-07-31 | 2005-11-08 | Andrew Corporation | Predistorter for phase modulated signals with low peak to average ratios |
US7023273B2 (en) | 2003-10-06 | 2006-04-04 | Andrew Corporation | Architecture and implementation methods of digital predistortion circuitry |
US7856105B2 (en) * | 2006-03-09 | 2010-12-21 | Andrew Llc | Apparatus and method for processing of amplifier linearization signals |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4879519A (en) * | 1988-10-31 | 1989-11-07 | American Telephone And Telegraph Company, At&T Bell Labs | Predistortion compensated linear amplifier |
US5023565A (en) * | 1990-01-26 | 1991-06-11 | At&T Bell Laboratories | Linear amplifier with automatic adjustment of feed forward loop gain and phase |
US5524285A (en) * | 1993-11-02 | 1996-06-04 | Wray; Anthony J. | Radio transmitter with power amplifier and linearization |
RU2142670C1 (ru) * | 1995-11-16 | 1999-12-10 | Самсунг Электроникс Ко., Лтд. | Устройство линейного усиления мощности |
-
1998
- 1998-03-31 US US09/052,833 patent/US6160996A/en not_active Expired - Lifetime
-
1999
- 1999-02-11 CA CA002261431A patent/CA2261431C/en not_active Expired - Fee Related
- 1999-02-25 TW TW088102849A patent/TW423232B/zh not_active IP Right Cessation
- 1999-03-17 BR BR9901015-1A patent/BR9901015A/pt not_active Application Discontinuation
- 1999-03-22 DE DE69901069T patent/DE69901069T2/de not_active Expired - Lifetime
- 1999-03-22 EP EP99302192A patent/EP0948131B1/en not_active Expired - Lifetime
- 1999-03-25 KR KR1019990010206A patent/KR100641527B1/ko not_active IP Right Cessation
- 1999-03-30 CN CN99104516A patent/CN1118132C/zh not_active Expired - Fee Related
- 1999-03-31 JP JP09038699A patent/JP3396643B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH11330870A (ja) | 1999-11-30 |
TW423232B (en) | 2001-02-21 |
EP0948131A1 (en) | 1999-10-06 |
CA2261431C (en) | 2002-05-21 |
CA2261431A1 (en) | 1999-09-30 |
KR19990078238A (ko) | 1999-10-25 |
DE69901069T2 (de) | 2002-11-07 |
EP0948131B1 (en) | 2002-03-27 |
DE69901069D1 (de) | 2002-05-02 |
CN1239352A (zh) | 1999-12-22 |
JP3396643B2 (ja) | 2003-04-14 |
KR100641527B1 (ko) | 2006-10-31 |
CN1118132C (zh) | 2003-08-13 |
US6160996A (en) | 2000-12-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FA10 | Dismissal: dismissal - article 33 of industrial property law | ||
B11Y | Definitive dismissal - extension of time limit for request of examination expired [chapter 11.1.1 patent gazette] | ||
B15K | Others concerning applications: alteration of classification |
Free format text: PROCEDIMENTO AUTOMATICO DE RECLASSIFICACAO. AS CLASSIFICACOES IPC ANTERIORES ERAM: H04Q 7/32; H04B 1/40. Ipc: H03F 1/32 (2006.01) Ipc: H03F 1/32 (2006.01) |