BR0008400A - Receptor de rádio, terminal de comunicações, e, método para compensar um deslocamento de cc indesejável dentro de um receptor de rádio - Google Patents
Receptor de rádio, terminal de comunicações, e, método para compensar um deslocamento de cc indesejável dentro de um receptor de rádioInfo
- Publication number
- BR0008400A BR0008400A BR0008400-0A BR0008400A BR0008400A BR 0008400 A BR0008400 A BR 0008400A BR 0008400 A BR0008400 A BR 0008400A BR 0008400 A BR0008400 A BR 0008400A
- Authority
- BR
- Brazil
- Prior art keywords
- radio receiver
- filter
- undesirable
- baseband signal
- compensate
- 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
-
- 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
- H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
- H04L25/061—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection providing hard decisions only; arrangements for tracking or suppressing unwanted low frequency components, e.g. removal of dc offset
- H04L25/062—Setting decision thresholds using feedforward techniques only
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
- H03D3/007—Demodulation of angle-, frequency- or phase- modulated oscillations by converting the oscillations into two quadrature related signals
- H03D3/008—Compensating DC offsets
-
- 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
- H04B1/16—Circuits
- H04B1/30—Circuits for homodyne or synchrodyne receivers
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Circuits Of Receivers In General (AREA)
- Noise Elimination (AREA)
- Superheterodyne Receivers (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
"RECEPTOR DE RáDIO, TERMINAL DE COMUNICAçõES, E, MéTODO PARA COMPENSAR UM DESLOCAMENTO DE CC INDESEJáVEL DENTRO DE UM RECEPTOR DE RáDIO". Um receptor de rádio e método são providos que efetivamente compensam um deslocamento de CC indesejável em uma seção digital do receptor de rádio através de pré-carregamento de um filtro com um deslocamento de CC médio antes de filtrar um sinal dentro do filtro. Mais especificamente, o receptor de rádio inclui uma antena para receber um sinal de rádio, e uma seção analógica para demodular o sinal de rádio recebido em pelo menos um sinal de banda base. O receptor de rádio também inclui uma seção analógica-para-digital para converter o pelo menos um sinal de banda base em pelo menos um sinal de banda base digital. O receptor de rádio ainda inclui um sistema de pré-carregamento para calcular um deslocamento de CC médio usando um número predeterminado de símbolos do pelo menos um sinal de banda base digital e para pré-carregar um filtro com o deslocamento de CC médio calculado antes de filtrar o pelo menos sinal de banda base digital no filtro.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/255,576 US6757340B1 (en) | 1999-02-22 | 1999-02-22 | Radio receiver and method for preloading an average DC-offset into a channel filter |
PCT/SE2000/000335 WO2000051254A1 (en) | 1999-02-22 | 2000-02-18 | Radio receiver and method for preloading an average dc-offset into a channel filter |
Publications (1)
Publication Number | Publication Date |
---|---|
BR0008400A true BR0008400A (pt) | 2002-01-29 |
Family
ID=22968930
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR0008400-0A BR0008400A (pt) | 1999-02-22 | 2000-02-18 | Receptor de rádio, terminal de comunicações, e, método para compensar um deslocamento de cc indesejável dentro de um receptor de rádio |
Country Status (12)
Country | Link |
---|---|
US (1) | US6757340B1 (pt) |
EP (1) | EP1155503B1 (pt) |
JP (2) | JP3769191B2 (pt) |
KR (1) | KR100407769B1 (pt) |
CN (1) | CN1183727C (pt) |
AU (1) | AU3204800A (pt) |
BR (1) | BR0008400A (pt) |
DE (1) | DE60032880D1 (pt) |
HK (1) | HK1048209B (pt) |
IL (1) | IL144820A0 (pt) |
MY (1) | MY130883A (pt) |
WO (1) | WO2000051254A1 (pt) |
Families Citing this family (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7221921B2 (en) * | 1998-05-29 | 2007-05-22 | Silicon Laboratories | Partitioning of radio-frequency apparatus |
US7035607B2 (en) * | 1998-05-29 | 2006-04-25 | Silicon Laboratories Inc. | Systems and methods for providing an adjustable reference signal to RF circuitry |
US7242912B2 (en) * | 1998-05-29 | 2007-07-10 | Silicon Laboratories Inc. | Partitioning of radio-frequency apparatus |
US6970717B2 (en) * | 2001-01-12 | 2005-11-29 | Silicon Laboratories Inc. | Digital architecture for radio-frequency apparatus and associated methods |
SE9903532D0 (sv) * | 1999-09-28 | 1999-09-28 | Jiren Yuan | Versatile charge sampling circuits |
GB2371931B (en) | 2001-02-06 | 2004-10-20 | Nokia Mobile Phones Ltd | Processing received signals |
FR2821218B1 (fr) * | 2001-02-22 | 2006-06-23 | Cit Alcatel | Dispositif de reception pour un terminal de radiocommunication mobile |
US6985711B2 (en) * | 2002-04-09 | 2006-01-10 | Qualcomm, Incorporated | Direct current offset cancellation for mobile station modems using direct conversion |
US8559559B2 (en) * | 2002-06-20 | 2013-10-15 | Qualcomm, Incorporated | Method and apparatus for compensating DC offsets in communication systems |
RU2005101209A (ru) * | 2002-06-20 | 2005-08-27 | Квэлкомм Инкорпорейтед (US) | Смещения по постоянному току в системах связи |
US7319852B2 (en) * | 2002-08-29 | 2008-01-15 | Qualcomm, Incorporated | Apparatus and method for DC offset compensation in a direct conversion receiver |
JP3898115B2 (ja) * | 2002-11-12 | 2007-03-28 | 株式会社エヌ・ティ・ティ・ドコモ | 受信装置、復調器及び通信方法 |
JP4523758B2 (ja) * | 2003-02-12 | 2010-08-11 | ソニー・エリクソン・モバイルコミュニケーションズ株式会社 | 受信回路及び無線通信端末装置 |
CN100444525C (zh) * | 2003-06-06 | 2008-12-17 | 美商内数位科技公司 | 补偿模拟无线传送器损害的数字基带系统 |
KR20060096434A (ko) * | 2003-10-21 | 2006-09-11 | 코닌클리즈케 필립스 일렉트로닉스 엔.브이. | 아날로그-투-디지털 변환, 아날로그 불요망 신호 억제시스템 및 방법, 튜너, 채널 디코더 및 이를 포함하는수신기 |
US7720451B2 (en) * | 2004-12-03 | 2010-05-18 | Itt Manufacturing Enterprises, Inc. | Methods and apparatus for calibrating oscillators in a receiver |
US7978788B2 (en) * | 2005-07-01 | 2011-07-12 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and arrangement for estimating DC offset |
KR100736228B1 (ko) * | 2006-04-28 | 2007-07-06 | 삼성탈레스 주식회사 | 알에프아이디 시스템에 있어서의 심볼 검출방법 |
US7769116B2 (en) | 2006-11-28 | 2010-08-03 | Maxim Integrated Products, Inc. | Methods and apparatus for simultaneous automatic gain, phase and DC offset correction in communication receivers |
CN101212436B (zh) * | 2006-12-25 | 2010-11-03 | 联芯科技有限公司 | 高通滤波器的频响特性的补偿装置及方法及零中频接收机 |
US7622987B1 (en) | 2007-01-25 | 2009-11-24 | Pmc-Sierra, Inc. | Pattern-based DC offset correction |
CN101286961B (zh) * | 2008-05-26 | 2012-04-18 | 华为技术有限公司 | 对设备输出的直流偏移进行校准的装置和方法 |
JP5292061B2 (ja) * | 2008-11-04 | 2013-09-18 | 株式会社五洋電子 | 直交復調器 |
US10148322B2 (en) * | 2016-04-01 | 2018-12-04 | Intel IP Corporation | Demodulator of a wireless communication reader |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5142552A (en) | 1988-02-22 | 1992-08-25 | Silicon Systems, Inc. | Method and apparatus for analog D.C. offset cancellation |
US4873702A (en) | 1988-10-20 | 1989-10-10 | Chiu Ran Fun | Method and apparatus for DC restoration in digital receivers |
DE4201194A1 (de) * | 1992-01-18 | 1993-07-22 | Sel Alcatel Ag | Verfahren und schaltungsanordnung zur offset-korrektur in einem tdma-funkempfaenger |
GB9211712D0 (en) | 1992-06-03 | 1992-07-15 | Fujitsu Microelectronics Ltd | Gm digital receive processing |
EP0594894B1 (en) * | 1992-10-28 | 1999-03-31 | Alcatel | DC offset correction for direct-conversion TDMA receiver |
GB2274759B (en) | 1993-02-02 | 1996-11-13 | Nokia Mobile Phones Ltd | Correction of D.C offset in received and demodulated radio signals |
US5504785A (en) * | 1993-05-28 | 1996-04-02 | Tv/Com Technologies, Inc. | Digital receiver for variable symbol rate communications |
US5724653A (en) | 1994-12-20 | 1998-03-03 | Lucent Technologies Inc. | Radio receiver with DC offset correction circuit |
JP2993443B2 (ja) | 1996-10-31 | 1999-12-20 | 日本電気株式会社 | 通信装置 |
JP3132459B2 (ja) | 1997-03-05 | 2001-02-05 | 日本電気株式会社 | ダイレクトコンバージョン受信機 |
-
1999
- 1999-02-22 US US09/255,576 patent/US6757340B1/en not_active Expired - Lifetime
- 1999-12-28 MY MYPI99005773A patent/MY130883A/en unknown
-
2000
- 2000-02-18 KR KR10-2001-7010634A patent/KR100407769B1/ko not_active IP Right Cessation
- 2000-02-18 DE DE60032880T patent/DE60032880D1/de not_active Expired - Fee Related
- 2000-02-18 WO PCT/SE2000/000335 patent/WO2000051254A1/en active IP Right Grant
- 2000-02-18 EP EP00909870A patent/EP1155503B1/en not_active Expired - Lifetime
- 2000-02-18 JP JP2000601755A patent/JP3769191B2/ja not_active Expired - Fee Related
- 2000-02-18 IL IL14482000A patent/IL144820A0/xx not_active IP Right Cessation
- 2000-02-18 BR BR0008400-0A patent/BR0008400A/pt not_active IP Right Cessation
- 2000-02-18 CN CNB008040745A patent/CN1183727C/zh not_active Expired - Fee Related
- 2000-02-18 AU AU32048/00A patent/AU3204800A/en not_active Abandoned
-
2003
- 2003-01-10 HK HK03100257.5A patent/HK1048209B/zh not_active IP Right Cessation
-
2005
- 2005-10-06 JP JP2005293270A patent/JP2006050673A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
JP2006050673A (ja) | 2006-02-16 |
JP2002543634A (ja) | 2002-12-17 |
EP1155503A1 (en) | 2001-11-21 |
US6757340B1 (en) | 2004-06-29 |
EP1155503B1 (en) | 2007-01-10 |
JP3769191B2 (ja) | 2006-04-19 |
DE60032880D1 (de) | 2007-02-22 |
HK1048209B (zh) | 2005-08-26 |
AU3204800A (en) | 2000-09-14 |
CN1359562A (zh) | 2002-07-17 |
KR100407769B1 (ko) | 2003-12-03 |
MY130883A (en) | 2007-07-31 |
CN1183727C (zh) | 2005-01-05 |
WO2000051254A1 (en) | 2000-08-31 |
IL144820A0 (en) | 2002-06-30 |
KR20010103019A (ko) | 2001-11-17 |
HK1048209A1 (en) | 2003-03-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
B08F | Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette] |
Free format text: REFERENTE A 7A, 8A E 9A ANUIDADES |
|
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 NA RPI2003 DE 26/05/2009. |