BR9814200A - Rádio-telefone de modo dual, processo de modulação de modo dual para um primeiro sinal de entrada digital e um segundo sinal de entrada digital, e, sistema de modulação para um sinal de entrada digital - Google Patents
Rádio-telefone de modo dual, processo de modulação de modo dual para um primeiro sinal de entrada digital e um segundo sinal de entrada digital, e, sistema de modulação para um sinal de entrada digitalInfo
- Publication number
- BR9814200A BR9814200A BR9814200-3A BR9814200A BR9814200A BR 9814200 A BR9814200 A BR 9814200A BR 9814200 A BR9814200 A BR 9814200A BR 9814200 A BR9814200 A BR 9814200A
- Authority
- BR
- Brazil
- Prior art keywords
- signal
- digital
- input signal
- digital input
- dual mode
- 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
- H04B1/71—Interference-related aspects the interference being narrowband interference
- H04B1/7101—Interference-related aspects the interference being narrowband interference with estimation filters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/487—Arrangements for providing information services, e.g. recorded voice services or time announcements
- H04M3/493—Interactive information services, e.g. directory enquiries ; Arrangements therefor, e.g. interactive voice response [IVR] systems or voice portals
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C3/00—Angle modulation
- H03C3/38—Angle modulation by converting amplitude modulation to angle modulation
- H03C3/40—Angle modulation by converting amplitude modulation to angle modulation using two signal paths the outputs of which have a predetermined phase difference and at least one output being amplitude-modulated
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/20—Modulator circuits; Transmitter circuits
- H04L27/2032—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner
- H04L27/2053—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases
- H04L27/206—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers
- H04L27/2067—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states
- H04L27/2071—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states in which the data are represented by the carrier phase, e.g. systems with differential coding
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
- H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
- H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
- H04B2201/7097—Direct sequence modulation interference
- H04B2201/709709—Methods of preventing interference
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Analogue/Digital Conversion (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Transmitters (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
"RáDIO-TELEFONE DE MODO DUAL, PROCESSO DE MODULAçãO DE MODO DUAL PARA UM PRIMEIRO SINAL DE ENTRADA DIGITAL E UM SEGUNDO SINAL DE ENTRADA DIGITAL, E, SISTEMA DE MODULAçãO PARA UM SINAL DE ENTRADA DIGITAL" Um sinal de largura de faixa estreita, tal como um sinal FM faixa estreita, é modulado em um modulador que modula um sinal de largura de faixa extensa, tal como um sinal CDMA, sobre amostrando o sinal de largura de faixa estreita e aplicando o sinal de largura de faixa estreita sobre amostrado ao modulador. Amostrando o sinal de largura de faixa estreita, o mesmo filtro passa baixa fixo pode ser usado para ambos sinal de largura de faixa extensa e sinal de largura de faixa estreita sobre amostrado. Consequentemente, diferentes filtros passa baixa ou filtros passa baixa comutados não são necessários. O desvio CC que é introduzido pelo conversor digital-analógico e/ou filtro passa baixa do modulador é compensado, preferivelmente no domínio digital, para reduzir desta forma o desvio CC dentro de limites aceitáveis para a modulação que está sendo usada. Mais preferivelmente, é provida a compensação subtraindo do sinal amostrado um valor digital representando o desvio CC no sinal analógico filtrado, que é introduzido pelo conversor digital-analógico e/ou filtro passa baixa. Um sensor sente o desvio CC no sinal analógico filtrado. Um conversor analógico-digital é sensível ao sensor, para converter o desvio CC sentido em um sinal de desvio digital. Um subtrator é sensível ao conversor analógico-digital para subtrair o sinal de desvio CC digital do sinal amostrado e aplicar o sinal amostrado menos o sinal de desvio CC, ao conversor digital-analógico.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/971,502 US6137826A (en) | 1997-11-17 | 1997-11-17 | Dual-mode modulation systems and methods including oversampling of narrow bandwidth signals |
US09/151,622 US6100827A (en) | 1998-09-11 | 1998-09-11 | Modulation systems and methods that compensate for DC offset introduced by the digital-to-analog converter and/or the low pass filter thereof |
US09/151,996 US6535561B2 (en) | 1997-11-17 | 1998-09-11 | Dual-mode modulation systems and methods including oversampling of narrow bandwidth signals and DC offset compensation |
PCT/US1998/023566 WO1999026361A1 (en) | 1997-11-17 | 1998-11-05 | Modulation systems and methods including oversampling of narrow bandwidth signals and dc offset compensation |
Publications (1)
Publication Number | Publication Date |
---|---|
BR9814200A true BR9814200A (pt) | 2000-09-26 |
Family
ID=27387152
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR9814200-3A BR9814200A (pt) | 1997-11-17 | 1998-11-05 | Rádio-telefone de modo dual, processo de modulação de modo dual para um primeiro sinal de entrada digital e um segundo sinal de entrada digital, e, sistema de modulação para um sinal de entrada digital |
Country Status (8)
Country | Link |
---|---|
JP (1) | JP2002542633A (pt) |
CN (1) | CN1150694C (pt) |
AU (1) | AU1382199A (pt) |
BR (1) | BR9814200A (pt) |
CA (1) | CA2310220A1 (pt) |
FI (1) | FI20001178A (pt) |
HK (1) | HK1035454A1 (pt) |
WO (1) | WO1999026361A1 (pt) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20020051301A (ko) * | 2000-12-22 | 2002-06-28 | 오길록 | 직류전원 오프셋이 제어된 디지털 직교 복조 장치 |
DE10136741A1 (de) | 2001-07-27 | 2002-10-31 | Infineon Technologies Ag | Schaltungsanordnung zur Regelung eines Signal-Gleichanteils und Mobilfunksender |
US7349680B2 (en) * | 2002-04-29 | 2008-03-25 | Broadcom Corporation | Method and system for using PSK sync word for fine tuning frequency adjustment |
US7231193B2 (en) * | 2004-04-13 | 2007-06-12 | Skyworks Solutions, Inc. | Direct current offset correction systems and methods |
CN100444517C (zh) * | 2004-10-19 | 2008-12-17 | 联发科技股份有限公司 | 直流偏移校正装置 |
JP4628881B2 (ja) * | 2005-06-15 | 2011-02-09 | ルネサスエレクトロニクス株式会社 | 可変利得増幅回路及びそのdcオフセット補正方法並びに無線受信装置 |
US7391196B2 (en) * | 2005-09-30 | 2008-06-24 | Silicon Laboratories Inc. | In system analysis and compensation for a digital PWM controller |
US8279180B2 (en) * | 2006-05-02 | 2012-10-02 | Apple Inc. | Multipoint touch surface controller |
WO2008026760A1 (fr) * | 2006-09-01 | 2008-03-06 | Panasonic Corporation | Procede et dispositif de communication radio |
JP5190233B2 (ja) | 2006-09-01 | 2013-04-24 | パナソニック株式会社 | 無線通信装置 |
CN102067457B (zh) * | 2008-04-28 | 2013-06-05 | 松下电器产业株式会社 | 积分器、谐振器以及过采样a/d转换器 |
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 |
JP5275196B2 (ja) | 2009-09-29 | 2013-08-28 | パナソニック株式会社 | 積分器およびそれを備えたオーバーサンプリングa/d変換器 |
CN103941069A (zh) * | 2013-12-30 | 2014-07-23 | 上海大郡动力控制技术有限公司 | 一种交流电流采样过程中直流偏置电压去除方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2636183B1 (fr) * | 1988-08-12 | 1990-10-12 | Thiriet Jean Yves | Filtre numerique a debit variable pour modulateur de phase |
US5248970A (en) * | 1991-11-08 | 1993-09-28 | Crystal Semiconductor Corp. | Offset calibration of a dac using a calibrated adc |
FI96811C (fi) * | 1993-11-30 | 1996-08-26 | Nokia Mobile Phones Ltd | Menetelmä ja piirijärjestely D/A-muuntimen DC-erojännitteen kompensoimiseksi |
ZA9510509B (en) * | 1994-12-23 | 1996-05-30 | Qualcomm Inc | Dual-mode digital FM communication system |
-
1998
- 1998-11-05 BR BR9814200-3A patent/BR9814200A/pt not_active IP Right Cessation
- 1998-11-05 CA CA002310220A patent/CA2310220A1/en not_active Abandoned
- 1998-11-05 WO PCT/US1998/023566 patent/WO1999026361A1/en active IP Right Grant
- 1998-11-05 JP JP2000521604A patent/JP2002542633A/ja active Pending
- 1998-11-05 CN CNB988131668A patent/CN1150694C/zh not_active Expired - Fee Related
- 1998-11-05 AU AU13821/99A patent/AU1382199A/en not_active Abandoned
-
2000
- 2000-05-16 FI FI20001178A patent/FI20001178A/fi not_active Application Discontinuation
-
2001
- 2001-08-28 HK HK01106064A patent/HK1035454A1/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
FI20001178A (fi) | 2000-05-16 |
CN1286834A (zh) | 2001-03-07 |
CA2310220A1 (en) | 1999-05-27 |
WO1999026361A1 (en) | 1999-05-27 |
JP2002542633A (ja) | 2002-12-10 |
AU1382199A (en) | 1999-06-07 |
HK1035454A1 (en) | 2001-11-23 |
CN1150694C (zh) | 2004-05-19 |
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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 11A., E 12A. ANUIDADE(S). |
|
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 2077 DE 26/10/2010. |