BR0004033A - Método e aparelho para reduzir potência de canal adjacente em sistemas de comunicação sem fio - Google Patents
Método e aparelho para reduzir potência de canal adjacente em sistemas de comunicação sem fioInfo
- Publication number
- BR0004033A BR0004033A BR0004033-9A BR0004033A BR0004033A BR 0004033 A BR0004033 A BR 0004033A BR 0004033 A BR0004033 A BR 0004033A BR 0004033 A BR0004033 A BR 0004033A
- Authority
- BR
- Brazil
- Prior art keywords
- adjacent channel
- wireless communication
- communication systems
- channel power
- amplifier
- Prior art date
Links
Classifications
-
- 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
- H04B1/7097—Interference-related 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
- 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
- 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)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
- Transmitters (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
<B>MéTODO E APARELHO PARA REDUZIR POTêNCIA DE CANAL ADJACENTE EM SISTEMAS DE COMUNICAçãO SEM FIO<D> A presente invenção refere-se a um método e aparelho para reduzir potência de canal adjacente em sistemas de comunicação sem fio. Mais particularmente, a presente invenção é dirigida a um sistema para pré-distorcer de forma digital e adaptável um sinal que inclui aplicar uma correção ao sinal antes que o mesmo seja aplicado à entrada de um amplificador de tal modo que a correção seja igual e oposta à distorção prevista produzida pelo amplificador. Desse modo, a correção e a distorção de amplificador anulam-se mutuamente, resultando em um sistema com uma característica de transferência linear global. Nestas circunstâncias, a potência de canal adjacente é desejavelmente reduzida.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/395,490 US7409007B1 (en) | 1999-09-14 | 1999-09-14 | Method and apparatus for reducing adjacent channel power in wireless communication systems |
Publications (1)
Publication Number | Publication Date |
---|---|
BR0004033A true BR0004033A (pt) | 2001-04-17 |
Family
ID=23563261
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR0004033-9A BR0004033A (pt) | 1999-09-14 | 2000-09-06 | Método e aparelho para reduzir potência de canal adjacente em sistemas de comunicação sem fio |
Country Status (9)
Country | Link |
---|---|
US (1) | US7409007B1 (pt) |
EP (1) | EP1085668B1 (pt) |
JP (1) | JP4676052B2 (pt) |
KR (1) | KR100739356B1 (pt) |
CN (1) | CN1288341A (pt) |
AU (1) | AU773197B2 (pt) |
BR (1) | BR0004033A (pt) |
CA (1) | CA2317901C (pt) |
DE (1) | DE60044485D1 (pt) |
Families Citing this family (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7158563B2 (en) * | 2001-06-01 | 2007-01-02 | The Board Of Trustees Of The Leland Stanford Junior University | Dynamic digital communication system control |
CN1221073C (zh) * | 2001-06-25 | 2005-09-28 | 诺基亚公司 | 在无线电发射机内限制信号的方法和设备 |
KR20030024241A (ko) * | 2001-09-17 | 2003-03-26 | 엘지전자 주식회사 | 블루투스 송신회로 |
US7248642B1 (en) | 2002-02-05 | 2007-07-24 | Andrew Corporation | Frequency-dependent phase pre-distortion for reducing spurious emissions in communication networks |
US7197085B1 (en) | 2002-03-08 | 2007-03-27 | Andrew Corporation | Frequency-dependent magnitude pre-distortion for reducing spurious emissions in communication networks |
US7266159B2 (en) | 2002-03-08 | 2007-09-04 | Andrew Corporation | Frequency-dependent magnitude pre-distortion on non-baseband input signals for reducing spurious emissions in communication networks |
JP3637323B2 (ja) | 2002-03-19 | 2005-04-13 | 株式会社東芝 | 受信装置、送受信装置及び受信方法 |
US8380143B2 (en) | 2002-05-01 | 2013-02-19 | Dali Systems Co. Ltd | Power amplifier time-delay invariant predistortion methods and apparatus |
US8811917B2 (en) | 2002-05-01 | 2014-08-19 | Dali Systems Co. Ltd. | Digital hybrid mode power amplifier system |
US7139327B2 (en) | 2002-06-10 | 2006-11-21 | Andrew Corporation | Digital pre-distortion of input signals for reducing spurious emissions in communication networks |
US7450636B2 (en) | 2002-09-05 | 2008-11-11 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Adaptive transmit equalizer |
US7035601B2 (en) | 2003-02-27 | 2006-04-25 | Nokia Corporation | Data transmission method, base station and transmitter for compensating for non-linearities in a transmission chain |
US7251293B2 (en) | 2003-06-27 | 2007-07-31 | Andrew Corporation | Digital pre-distortion for the linearization of power amplifiers with asymmetrical characteristics |
US7738544B2 (en) | 2004-01-30 | 2010-06-15 | Electronics & Telecommunications Research Institute | Apparatus and method for measuring received signal strength indicator, and recording medium storing program embodying the same method |
KR100553434B1 (ko) | 2004-08-13 | 2006-02-20 | 주식회사 팬택앤큐리텔 | Rf 수신 장치 |
US7787562B2 (en) | 2004-12-29 | 2010-08-31 | Motorola, Inc. | Method and apparatus for adaptive modulation of wireless communication signals |
JP5085896B2 (ja) * | 2006-02-17 | 2012-11-28 | 富士通株式会社 | 信号ピーク電圧抑圧装置 |
US9026067B2 (en) * | 2007-04-23 | 2015-05-05 | Dali Systems Co. Ltd. | Remotely reconfigurable power amplifier system and method |
EP3416340B1 (en) | 2006-12-26 | 2020-10-21 | Dali Systems Co., Ltd. | Method and system for baseband predistortion linearization in multi-channel wideband communication systems |
CN102150361B (zh) | 2007-12-07 | 2016-11-09 | 大力系统有限公司 | 基带导出的射频数字预失真 |
KR101145830B1 (ko) * | 2008-10-29 | 2012-05-17 | 주식회사 케이제이티 | 전치왜곡장치 및 간섭억제시스템 필터-유닛이 적용된 이동통신장치의 출력단 |
US8358680B2 (en) * | 2008-12-23 | 2013-01-22 | Apple Inc. | Reducing power levels associated with two or more signals using peak reduction distortion that is derived from a combined signal |
JP5244698B2 (ja) * | 2009-05-18 | 2013-07-24 | アイコム株式会社 | 送信電力制御装置及び送信電力制御方法 |
KR102136940B1 (ko) | 2010-09-14 | 2020-07-23 | 달리 시스템즈 씨오. 엘티디. | 원격으로 재구성가능한 분산 안테나 시스템 및 방법 |
US8711976B2 (en) | 2011-05-12 | 2014-04-29 | Andrew Llc | Pre-distortion architecture for compensating non-linear effects |
US8792572B1 (en) * | 2013-05-30 | 2014-07-29 | Telefonaktiebolaget L M Ericsson (Publ) | Universal peak power reduction in communication radios |
JP2015142325A (ja) | 2014-01-30 | 2015-08-03 | 富士通株式会社 | 歪補償装置および歪補償方法 |
EP3682682A1 (en) * | 2017-09-11 | 2020-07-22 | Telefonaktiebolaget LM Ericsson (Publ) | Transmit power control in a wireless communications network |
CN112262369B (zh) * | 2018-07-26 | 2024-04-02 | 上海诺基亚贝尔股份有限公司 | 用于数据处理的方法、装置和计算机可读介质 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2265270B (en) * | 1992-03-02 | 1996-06-12 | Motorola Ltd | Rf power amplifier with linearization |
JP2718398B2 (ja) | 1995-06-30 | 1998-02-25 | 日本電気株式会社 | Cdma基地局送信装置 |
DE69728651T2 (de) | 1996-11-19 | 2004-08-19 | Matsushita Electric Industrial Co., Ltd., Kadoma | Sender mit linearisiertem Verstärker |
JP3139395B2 (ja) * | 1996-11-19 | 2001-02-26 | 松下電器産業株式会社 | 送信装置 |
JP3221335B2 (ja) * | 1996-11-19 | 2001-10-22 | 松下電器産業株式会社 | 非線形歪補償装置 |
US5920808A (en) * | 1996-12-12 | 1999-07-06 | Glenayre Electronics, Inc. | Method and apparatus for reducing key-up distortion by pre-heating transistors |
US5923712A (en) * | 1997-05-05 | 1999-07-13 | Glenayre Electronics, Inc. | Method and apparatus for linear transmission by direct inverse modeling |
US5867065A (en) | 1997-05-07 | 1999-02-02 | Glenayre Electronics, Inc. | Frequency selective predistortion in a linear transmitter |
US5963549A (en) * | 1997-12-10 | 1999-10-05 | L-3 Communications Corporation | Fixed wireless loop system having baseband combiner predistortion summing table |
US6075411A (en) | 1997-12-22 | 2000-06-13 | Telefonaktiebolaget Lm Ericsson | Method and apparatus for wideband predistortion linearization |
US6288610B1 (en) * | 1998-03-19 | 2001-09-11 | Fujitsu Limited | Method and apparatus for correcting signals, apparatus for compensating for distortion, apparatus for preparing distortion compensating data, and transmitter |
US6493543B1 (en) * | 1998-10-19 | 2002-12-10 | Powerwave Technologies, Inc. | Multichannel amplification system using mask detection |
US6614854B1 (en) * | 1999-05-28 | 2003-09-02 | Carriercomm, Inc. | System and method for adaptive predistortion |
US6507732B1 (en) | 1999-09-14 | 2003-01-14 | Lucent Technologies Inc. | Dynamic path gain compensation for radios in wireless communication systems |
-
1999
- 1999-09-14 US US09/395,490 patent/US7409007B1/en not_active Expired - Fee Related
-
2000
- 2000-09-04 DE DE60044485T patent/DE60044485D1/de not_active Expired - Lifetime
- 2000-09-04 EP EP00307643A patent/EP1085668B1/en not_active Expired - Lifetime
- 2000-09-06 BR BR0004033-9A patent/BR0004033A/pt not_active Application Discontinuation
- 2000-09-07 CA CA2317901A patent/CA2317901C/en not_active Expired - Fee Related
- 2000-09-07 AU AU56554/00A patent/AU773197B2/en not_active Ceased
- 2000-09-12 CN CN00126391A patent/CN1288341A/zh active Pending
- 2000-09-13 JP JP2000277712A patent/JP4676052B2/ja not_active Expired - Fee Related
- 2000-09-14 KR KR1020000054035A patent/KR100739356B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR20010050450A (ko) | 2001-06-15 |
US7409007B1 (en) | 2008-08-05 |
AU773197B2 (en) | 2004-05-20 |
EP1085668A2 (en) | 2001-03-21 |
JP4676052B2 (ja) | 2011-04-27 |
CN1288341A (zh) | 2001-03-21 |
EP1085668A3 (en) | 2003-09-03 |
KR100739356B1 (ko) | 2007-07-18 |
AU5655400A (en) | 2001-03-15 |
CA2317901A1 (en) | 2001-03-14 |
DE60044485D1 (de) | 2010-07-15 |
CA2317901C (en) | 2011-04-19 |
JP2001127819A (ja) | 2001-05-11 |
EP1085668B1 (en) | 2010-06-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
B15K | Others concerning applications: alteration of classification |
Free format text: ALTERADA A CLASSIFICACAO H04Q 7/38 PARA INT. CL. 2012.01 H04B 1/04, H04B 1/62. Ipc: H04B 1/04 (2006.01), H04B 1/62 (2006.01) |
|
B07A | Application suspended after technical examination (opinion) [chapter 7.1 patent gazette] | ||
B09B | Patent application refused [chapter 9.2 patent gazette] |
Free format text: INDEFIRO O PEDIDO DE ACORDO COM O ART .8O COMBINADO COM ART. 13 DA LPI |
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B09B | Patent application refused [chapter 9.2 patent gazette] |
Free format text: MANTIDO O INDEFERIMENTO UMA VEZ QUE NAO FOI APRESENTADO RECURSO DENTRO DO PRAZO LEGAL. |