HK1035454A1 - Modulation systems and methods including oversampling of narrow bandwidth signals and dc offset compensation. - Google Patents

Modulation systems and methods including oversampling of narrow bandwidth signals and dc offset compensation.

Info

Publication number
HK1035454A1
HK1035454A1 HK01106064A HK01106064A HK1035454A1 HK 1035454 A1 HK1035454 A1 HK 1035454A1 HK 01106064 A HK01106064 A HK 01106064A HK 01106064 A HK01106064 A HK 01106064A HK 1035454 A1 HK1035454 A1 HK 1035454A1
Authority
HK
Hong Kong
Prior art keywords
methods including
offset compensation
narrow bandwidth
modulation systems
bandwidth signals
Prior art date
Application number
HK01106064A
Inventor
Ronald D Boesch
Domenico Arpaia
Original Assignee
Ericsson Inc
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 Ericsson Inc filed Critical Ericsson Inc
Publication of HK1035454A1 publication Critical patent/HK1035454A1/en

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)
  • Analogue/Digital Conversion (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Transmitters (AREA)
  • Mobile Radio Communication Systems (AREA)
HK01106064A 1997-11-17 2001-08-28 Modulation systems and methods including oversampling of narrow bandwidth signals and dc offset compensation. HK1035454A1 (en)

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
US09/151,996 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
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
HK1035454A1 true HK1035454A1 (en) 2001-11-23

Family

ID=27387152

Family Applications (1)

Application Number Title Priority Date Filing Date
HK01106064A HK1035454A1 (en) 1997-11-17 2001-08-28 Modulation systems and methods including oversampling of narrow bandwidth signals and dc offset compensation.

Country Status (8)

Country Link
JP (1) JP2002542633A (en)
CN (1) CN1150694C (en)
AU (1) AU1382199A (en)
BR (1) BR9814200A (en)
CA (1) CA2310220A1 (en)
FI (1) FI20001178A (en)
HK (1) HK1035454A1 (en)
WO (1) WO1999026361A1 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020051301A (en) * 2000-12-22 2002-06-28 오길록 A digital orthogonal demodulator with controlled DC offset
DE10136741A1 (en) * 2001-07-27 2002-10-31 Infineon Technologies Ag Circuit arrangement for regulating d.c. signal component has arrangement for influencing d.c. component connected before detector and with control input connected to comparator output
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 (en) * 2004-10-19 2008-12-17 联发科技股份有限公司 DC excursion correcting device
JP4628881B2 (en) * 2005-06-15 2011-02-09 ルネサスエレクトロニクス株式会社 Variable gain amplifier circuit, DC offset correction method thereof, and wireless receiver
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 (en) * 2006-09-01 2008-03-06 Panasonic Corporation Radio communication method and radio communication device
JP5190233B2 (en) 2006-09-01 2013-04-24 パナソニック株式会社 Wireless communication device
WO2009133653A1 (en) * 2008-04-28 2009-11-05 パナソニック株式会社 Integrator, resonator, and oversampling a/d converter
CN101286961B (en) * 2008-05-26 2012-04-18 华为技术有限公司 Correcting device and method for direct current off-set outputted by equipment
JP5275196B2 (en) * 2009-09-29 2013-08-28 パナソニック株式会社 Integrator and oversampling A / D converter having the same
CN103941069A (en) * 2013-12-30 2014-07-23 上海大郡动力控制技术有限公司 Method for removing DC bias voltage in AC current sampling process

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2636183B1 (en) * 1988-08-12 1990-10-12 Thiriet Jean Yves VARIABLE FLOW DIGITAL FILTER FOR PHASE MODULATOR
US5248970A (en) * 1991-11-08 1993-09-28 Crystal Semiconductor Corp. Offset calibration of a dac using a calibrated adc
FI96811C (en) * 1993-11-30 1996-08-26 Nokia Mobile Phones Ltd Method and circuitry for compensating the DC offset voltage in a D / A converter
TW294867B (en) * 1994-12-23 1997-01-01 Qualcomm Inc

Also Published As

Publication number Publication date
WO1999026361A1 (en) 1999-05-27
CN1150694C (en) 2004-05-19
FI20001178A (en) 2000-05-16
JP2002542633A (en) 2002-12-10
BR9814200A (en) 2000-09-26
CN1286834A (en) 2001-03-07
CA2310220A1 (en) 1999-05-27
AU1382199A (en) 1999-06-07

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Legal Events

Date Code Title Description
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)

Effective date: 20081105