BR0312221A - Cancelamento cego de modulação cruzada por adição de sinal modulado - Google Patents
Cancelamento cego de modulação cruzada por adição de sinal moduladoInfo
- Publication number
- BR0312221A BR0312221A BR0312221-2A BR0312221A BR0312221A BR 0312221 A BR0312221 A BR 0312221A BR 0312221 A BR0312221 A BR 0312221A BR 0312221 A BR0312221 A BR 0312221A
- Authority
- BR
- Brazil
- Prior art keywords
- signal
- bleed
- receive path
- amplitude modulated
- jammer
- 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
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/109—Means associated with receiver for limiting or suppressing noise or interference by improving strong signal performance of the receiver when strong unwanted signals are present at the receiver input
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Power Engineering (AREA)
- Noise Elimination (AREA)
- Amplifiers (AREA)
- Developing Agents For Electrophotography (AREA)
- Optical Communication System (AREA)
Abstract
"CANCELAMENTO CEGO DE MODULAçãO CRUZADA POR ADIçãO DE SINAL MODULADO". Um método para processamento de sinais aplicado em um módulo de comunicação sem fio possuindo uma via de recepção impede um dispositivo não linear na via de recepção de usar um sinal modulado por amplitude de transmissão ou outro sinal difundido (bleed-over) na via de recepção para modular um sinal de interferência (jammer) não modulado por amplitude na via de recepção (ou para modular adicionalmente um sinal de interferência já modulado por amplitude). O sinal difundido é condicionado pela adição de um ou mais sinais falsos ou fantasmas (dummy) modulados por amplitude possuindo um envelope ou intervalo que complementa um envelope do sinal difundido, forçando o circuito não linear a operar linearmente com relação ao sinal de interferência. A saída do amplificador pode ser filtrada para remover sinais possuindo amplitudes de banda dos sinais falsos, do sinal difundido, do sinal de interferência e quaisquer produtos de intermodulação gerados pela introdução dos sinais falsos.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/187,087 US6954627B2 (en) | 2002-06-28 | 2002-06-28 | Blind modulation cancellation by addition of modulated signal |
PCT/US2003/020385 WO2004004144A1 (en) | 2002-06-28 | 2003-06-28 | Blind cancellation of cross-modulation by addition of modulated signal |
Publications (1)
Publication Number | Publication Date |
---|---|
BR0312221A true BR0312221A (pt) | 2005-04-12 |
Family
ID=29779988
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR0312221-2A BR0312221A (pt) | 2002-06-28 | 2003-06-28 | Cancelamento cego de modulação cruzada por adição de sinal modulado |
Country Status (11)
Country | Link |
---|---|
US (1) | US6954627B2 (pt) |
EP (1) | EP1518329B1 (pt) |
JP (1) | JP4444824B2 (pt) |
CN (1) | CN100380823C (pt) |
AT (1) | ATE397324T1 (pt) |
AU (1) | AU2003256327A1 (pt) |
BR (1) | BR0312221A (pt) |
DE (1) | DE60321344D1 (pt) |
HK (1) | HK1082128A1 (pt) |
TW (1) | TWI322580B (pt) |
WO (1) | WO2004004144A1 (pt) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8170487B2 (en) * | 2006-02-03 | 2012-05-01 | Qualcomm, Incorporated | Baseband transmitter self-jamming and intermodulation cancellation device |
US8098779B2 (en) * | 2006-08-08 | 2012-01-17 | Qualcomm Incorporated | Interference detection and mitigation |
JP5641951B2 (ja) * | 2010-09-13 | 2014-12-17 | ルネサスエレクトロニクス株式会社 | 無線通信システム、無線通信方法、無線機器およびデータ送信機 |
US20130155911A1 (en) * | 2011-12-16 | 2013-06-20 | Broadcom Corporation | Radio Transceiver With IM2 Mitigation |
CN106664108B (zh) * | 2014-07-10 | 2019-05-17 | 瑞典爱立信有限公司 | 消除互调干扰的方法和设备 |
JP2018157248A (ja) * | 2017-03-15 | 2018-10-04 | 株式会社村田製作所 | フロントエンドモジュール |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3696429A (en) * | 1971-05-24 | 1972-10-03 | Cutler Hammer Inc | Signal cancellation system |
US4475243A (en) * | 1982-12-21 | 1984-10-02 | Motorola, Inc. | Isolation method and apparatus for a same frequency repeater |
US4710723A (en) * | 1986-04-04 | 1987-12-01 | Harris Corporation | Receiver having a modulation amplifier for enhancing reception of a desired signal in the presence of interference |
US5691978A (en) * | 1995-04-07 | 1997-11-25 | Signal Science, Inc. | Self-cancelling full-duplex RF communication system |
US5710521A (en) * | 1995-12-29 | 1998-01-20 | Qualcomm Incorporated | Out-of-band compensation for non-linear device |
US5892397A (en) * | 1996-03-29 | 1999-04-06 | Spectrian | Adaptive compensation of RF amplifier distortion by injecting predistortion signal derived from respectively different functions of input signal amplitude |
US6137888A (en) * | 1997-06-02 | 2000-10-24 | Nortel Networks Corporation | EM interference canceller in an audio amplifier |
US6311045B1 (en) * | 1997-07-28 | 2001-10-30 | Roke Manor Research Limited | Apparatus for signal isolation in a radio transmitter-receiver |
EP1080535A1 (en) * | 1998-04-24 | 2001-03-07 | QUALCOMM Incorporated | Circuit for reduction of cross modulation and increased battery life in a battery powered transceiver |
US6561809B1 (en) * | 2000-07-17 | 2003-05-13 | Battlepaint, Inc. | Virtual battlefield simulator system and method |
US6567649B2 (en) * | 2000-08-22 | 2003-05-20 | Novatel Wireless, Inc. | Method and apparatus for transmitter noise cancellation in an RF communications system |
US6539204B1 (en) * | 2000-09-29 | 2003-03-25 | Mobilian Corporation | Analog active cancellation of a wireless coupled transmit signal |
-
2002
- 2002-06-28 US US10/187,087 patent/US6954627B2/en not_active Expired - Fee Related
-
2003
- 2003-06-27 TW TW092117619A patent/TWI322580B/zh not_active IP Right Cessation
- 2003-06-28 BR BR0312221-2A patent/BR0312221A/pt not_active IP Right Cessation
- 2003-06-28 JP JP2004518007A patent/JP4444824B2/ja not_active Expired - Fee Related
- 2003-06-28 WO PCT/US2003/020385 patent/WO2004004144A1/en active Application Filing
- 2003-06-28 CN CNB038150743A patent/CN100380823C/zh not_active Expired - Fee Related
- 2003-06-28 EP EP03762168A patent/EP1518329B1/en not_active Expired - Lifetime
- 2003-06-28 DE DE60321344T patent/DE60321344D1/de not_active Expired - Lifetime
- 2003-06-28 AU AU2003256327A patent/AU2003256327A1/en not_active Abandoned
- 2003-06-28 AT AT03762168T patent/ATE397324T1/de not_active IP Right Cessation
-
2006
- 2006-02-18 HK HK06102197A patent/HK1082128A1/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
AU2003256327A1 (en) | 2004-01-19 |
US6954627B2 (en) | 2005-10-11 |
HK1082128A1 (en) | 2006-05-26 |
TW200412039A (en) | 2004-07-01 |
CN100380823C (zh) | 2008-04-09 |
ATE397324T1 (de) | 2008-06-15 |
EP1518329A1 (en) | 2005-03-30 |
JP2005531991A (ja) | 2005-10-20 |
CN1666424A (zh) | 2005-09-07 |
WO2004004144A1 (en) | 2004-01-08 |
DE60321344D1 (de) | 2008-07-10 |
JP4444824B2 (ja) | 2010-03-31 |
TWI322580B (en) | 2010-03-21 |
US20040002300A1 (en) | 2004-01-01 |
EP1518329B1 (en) | 2008-05-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5861777A (en) | Method and apparatus for compensation of phase distortion in power amplifiers | |
SE9602584D0 (sv) | Anordning och förfarande vid radiosändare | |
SE0001260L (sv) | Bredbandig effektförstärkare med hög verkningsgrad | |
CA2237260A1 (en) | Optical transmitter | |
HK1082128A1 (en) | Blind cancellation of cross-modulation by additionof modulated signal | |
US20080057881A1 (en) | Bandwidth enhancement for envelope elimination and restoration transmission systems | |
AU2003216211A1 (en) | Method and apparatus using base band transformation to improve transmitter performance | |
WO1999005783A1 (en) | Low distortion power amplifier | |
WO2007130874B1 (en) | Spread spectrum ask/ook transmitter | |
NO20040367L (no) | Beregningskretser og fremgangsmater for a prosessere modulerte signaler med ikke-konstante omhyllinger. | |
DE60230027D1 (de) | Gesteuerte modulationsverzerrung | |
US5831475A (en) | Method and apparatus for delay matching in a power amplifier | |
JP2004191979A (ja) | マッハツェンダ変調器を用いた光crz送信装置 | |
CA2220393A1 (en) | Data transmission system with a low peak-to-average power ratio based on distorting small amplitude signals | |
CA2220507A1 (en) | Data transmission system with a low peak-to-average power ratio based on distorting frequently occurring signals | |
US7095799B2 (en) | Systems and methods for providing baseband-derived predistortion to increase efficiency of transmitters | |
KR920009100A (ko) | 고주파전력 증폭회로 및 그것을 이용한 이동체 무선통신장치 | |
KR100819307B1 (ko) | 델타-시그마 변조된 신호를 사용하는 전력 증폭기의 입력정합 장치 및 방법 | |
ATE460770T1 (de) | Blind-linearisierung unter anwendung von kreuz- modulation | |
EP2433360B1 (en) | Transmitter with quantization noise compensation | |
TW200719578A (en) | Operational amplifier and related noise seperation method thereof | |
Katz et al. | Improved radio over fiber performance using predistortion linearization | |
DE69738651D1 (de) | Verfahren zum kombinieren von verschiedenen signalen und feststation | |
KR20020039611A (ko) | 위상 및 진폭-변조 신호 송신기를 포함하는 장치, 및그러한 장치에서 구현되는 방법 | |
AU2002348893A1 (en) | Frequency modulator using switched capacitors |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
B15I | Others concerning applications: loss of priority |
Free format text: PERDA DA PRIORIDADE REIVINDICADA POR NAO ATENDER AS DISPOSICOES PREVISTAS NO ARTIGO 16 6O E 7O DA LPI. |
|
B150 | Others concerning applications: publication cancelled [chapter 15.30 patent gazette] |
Free format text: ANULADO O DESPACHO 15.9 DA RPI NO 2015 DE 18/08/2009, POR TER SIDO REALIZADO INDEVIDAMENTE. |
|
B08F | Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette] |
Free format text: REFERENTE A 9A ANUIDADE. |
|
B08K | Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette] |
Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 2157 DE 08/05/2012. |