CA2310220A1 - Systemes de modulation et procedes de surechantillonnage de signaux large bande et de compensation de decalage du niveau continu - Google Patents

Systemes de modulation et procedes de surechantillonnage de signaux large bande et de compensation de decalage du niveau continu Download PDF

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Publication number
CA2310220A1
CA2310220A1 CA002310220A CA2310220A CA2310220A1 CA 2310220 A1 CA2310220 A1 CA 2310220A1 CA 002310220 A CA002310220 A CA 002310220A CA 2310220 A CA2310220 A CA 2310220A CA 2310220 A1 CA2310220 A1 CA 2310220A1
Authority
CA
Canada
Prior art keywords
signal
digital
offset
analog
low pass
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
CA002310220A
Other languages
English (en)
Inventor
Ronald D. Boesch
Domenico Arpaia
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ericsson Inc
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US08/971,502 external-priority patent/US6137826A/en
Priority claimed from US09/151,622 external-priority patent/US6100827A/en
Application filed by Individual filed Critical Individual
Publication of CA2310220A1 publication Critical patent/CA2310220A1/fr
Abandoned legal-status Critical Current

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
    • 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)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Analogue/Digital Conversion (AREA)
  • Transmitters (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention porte sur une signal étroit à large bande tel qu'un signal MF modulé par un modulateur qui module un signal large à large bande tel qu'un signal AMDC (accès multiple par différence de code) par suréchantillonnage du signal étroit et par application du signal étroit suréchantillonné sur le modulateur. En suréchantillonnant le signal étroit à large bande, on peut utiliser le même filtre passe-bas fixe pour le signal large et pour le signal étroit suréchantillonné. Il n'est donc pas nécessaire d'utiliser différents filtres passe-bas ou des filtres passe-bas commutés. Le décalage du niveau continu qui est introduit par le numériseur et/ou par le filtre passe-bas du modulateur est compensé, de préférence dans le domaine numérique, de façon à réduire ce décalage dans les limites acceptables de la modulation utilisée. De préférence, on effectue une compensation en soustrayant du signal échantillonné une valeur numérique représentant le décalage du niveau continu dans le signal analogique filtré introduit par le numériseur et/ou le filtre passe-bas. Un capteur détecte le décalage du niveau continu dans le signal analogique filtré. Un dénumériseur réagit au capteur de façon à convertir le décalage du niveau continu détecté en un signal de décalage numérisé. Un soustracteur réagit au dénumériseur de façon à soustraire le signal de décalage du courant continu du signal échantillonné et à appliquer le signal échantillonné moins le signal de décalage du niveau continu sur le numériseur.
CA002310220A 1997-11-17 1998-11-05 Systemes de modulation et procedes de surechantillonnage de signaux large bande et de compensation de decalage du niveau continu Abandoned CA2310220A1 (fr)

Applications Claiming Priority (7)

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
US08/971,502 1997-11-17
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
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
US09/151,622 1998-09-11
US09/151,996 1998-09-11
PCT/US1998/023566 WO1999026361A1 (fr) 1997-11-17 1998-11-05 Systemes de modulation et procedes de surechantillonnage de signaux large bande et de compensation de decalage du niveau continu

Publications (1)

Publication Number Publication Date
CA2310220A1 true CA2310220A1 (fr) 1999-05-27

Family

ID=27387152

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002310220A Abandoned CA2310220A1 (fr) 1997-11-17 1998-11-05 Systemes de modulation et procedes de surechantillonnage de signaux large bande et de compensation de decalage du niveau continu

Country Status (7)

Country Link
JP (1) JP2002542633A (fr)
CN (1) CN1150694C (fr)
AU (1) AU1382199A (fr)
BR (1) BR9814200A (fr)
CA (1) CA2310220A1 (fr)
FI (1) FI20001178A7 (fr)
WO (1) WO1999026361A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
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
JP5190233B2 (ja) * 2006-09-01 2013-04-24 パナソニック株式会社 無線通信装置
WO2008026760A1 (fr) * 2006-09-01 2008-03-06 Panasonic Corporation Procede et dispositif de communication radio
WO2009133653A1 (fr) * 2008-04-28 2009-11-05 パナソニック株式会社 Intégrateur, résonateur et convertisseur analogique/numérique de suréchantillonnage
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
CN114754926B (zh) * 2022-04-19 2025-07-25 辽宁机电职业技术学院 一种摆轮偏重参数测量系统及方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
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
TW294867B (fr) * 1994-12-23 1997-01-01 Qualcomm Inc

Also Published As

Publication number Publication date
CN1286834A (zh) 2001-03-07
BR9814200A (pt) 2000-09-26
AU1382199A (en) 1999-06-07
CN1150694C (zh) 2004-05-19
FI20001178A7 (fi) 2000-05-16
HK1035454A1 (en) 2001-11-23
JP2002542633A (ja) 2002-12-10
WO1999026361A1 (fr) 1999-05-27

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Date Code Title Description
EEER Examination request
FZDE Discontinued

Effective date: 20130204