FI114670B - Digitaalinen kompensointi suoramuuntovastaanottimessa - Google Patents

Digitaalinen kompensointi suoramuuntovastaanottimessa Download PDF

Info

Publication number
FI114670B
FI114670B FI972786A FI972786A FI114670B FI 114670 B FI114670 B FI 114670B FI 972786 A FI972786 A FI 972786A FI 972786 A FI972786 A FI 972786A FI 114670 B FI114670 B FI 114670B
Authority
FI
Finland
Prior art keywords
signal
baseband
samples
digital samples
digital
Prior art date
Application number
FI972786A
Other languages
English (en)
Finnish (fi)
Swedish (sv)
Other versions
FI972786A (fi
FI972786A0 (fi
Inventor
Bjoern Lindquist
Martin Isberg
Heino Wendelrup
Martin Sallenhag
Kjell Gustafsson
Original Assignee
Ericsson Telefon Ab L M
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
Application filed by Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of FI972786A0 publication Critical patent/FI972786A0/fi
Publication of FI972786A publication Critical patent/FI972786A/fi
Application granted granted Critical
Publication of FI114670B publication Critical patent/FI114670B/fi

Links

Classifications

    • 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
    • H03D3/009—Compensating quadrature phase or amplitude imbalances
    • 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
    • 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
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/227—Demodulator circuits; Receiver circuits using coherent demodulation
    • H04L27/2275—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses the received modulated signals
    • 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
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation
    • H04L27/2332—Demodulator circuits; Receiver circuits using non-coherent demodulation using a non-coherent carrier

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Noise Elimination (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
FI972786A 1994-12-28 1997-06-27 Digitaalinen kompensointi suoramuuntovastaanottimessa FI114670B (fi)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US08/365,037 US5579347A (en) 1994-12-28 1994-12-28 Digitally compensated direct conversion receiver
US36503794 1994-12-28
PCT/SE1995/001546 WO1996020539A1 (en) 1994-12-28 1995-12-19 Digitally compensated direct conversion receiver
SE9501546 1995-12-19

Publications (3)

Publication Number Publication Date
FI972786A0 FI972786A0 (fi) 1997-06-27
FI972786A FI972786A (fi) 1997-08-22
FI114670B true FI114670B (fi) 2004-11-30

Family

ID=23437213

Family Applications (1)

Application Number Title Priority Date Filing Date
FI972786A FI114670B (fi) 1994-12-28 1997-06-27 Digitaalinen kompensointi suoramuuntovastaanottimessa

Country Status (14)

Country Link
US (1) US5579347A (pl)
EP (2) EP0835557B1 (pl)
JP (1) JPH10513616A (pl)
KR (1) KR100379723B1 (pl)
CN (2) CN1086066C (pl)
AU (1) AU698865B2 (pl)
BR (1) BR9510108A (pl)
CA (1) CA2208850A1 (pl)
DE (2) DE69533175T2 (pl)
FI (1) FI114670B (pl)
NO (1) NO972985L (pl)
PL (1) PL184618B1 (pl)
RU (1) RU2146416C1 (pl)
WO (1) WO1996020539A1 (pl)

Families Citing this family (64)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8280334B2 (en) 1996-02-05 2012-10-02 American Radio Llc System and method for radio signal reconstruction using signal processor
US5864754A (en) 1996-02-05 1999-01-26 Hotto; Robert System and method for radio signal reconstruction using signal processor
KR19990008125A (ko) * 1996-02-29 1999-01-25 요트. 게. 아. 롤페즈 위상 분할된 입력 신호를 디지탈 처리하는 수신기
US5838735A (en) * 1996-07-08 1998-11-17 Telefonaktiebolaget Lm Ericsson Method and apparatus for compensating for a varying d.c. offset in a sampled signal
US5749051A (en) * 1996-07-18 1998-05-05 Ericsson Inc. Compensation for second order intermodulation in a homodyne receiver
US5918169A (en) * 1996-09-25 1999-06-29 Ericsson, Inc. Homodyne cellular base station
US5963856A (en) * 1997-01-03 1999-10-05 Lucent Technologies Inc Wireless receiver including tunable RF bandpass filter
JP3860292B2 (ja) * 1997-06-24 2006-12-20 大井電気株式会社 周波数シフトキーイング信号の復調方法
US6029052A (en) * 1997-07-01 2000-02-22 Telefonaktiebolaget Lm Ericsson Multiple-mode direct conversion receiver
US6021323A (en) * 1997-09-25 2000-02-01 Rockwell Science Center, Inc. Direct conversion receiver with reduced even order distortion
JPH11234150A (ja) * 1998-02-09 1999-08-27 Toshiba Corp デジタル復調装置
US6088581A (en) * 1998-03-27 2000-07-11 Motorola, Inc. Method and apparatus for reducing amplitude modulated interference in a receiver
US6694128B1 (en) 1998-08-18 2004-02-17 Parkervision, Inc. Frequency synthesizer using universal frequency translation technology
US6061551A (en) 1998-10-21 2000-05-09 Parkervision, Inc. Method and system for down-converting electromagnetic signals
US6091940A (en) 1998-10-21 2000-07-18 Parkervision, Inc. Method and system for frequency up-conversion
US7515896B1 (en) 1998-10-21 2009-04-07 Parkervision, Inc. Method and system for down-converting an electromagnetic signal, and transforms for same, and aperture relationships
US7065327B1 (en) 1998-09-10 2006-06-20 Intel Corporation Single-chip CMOS direct-conversion transceiver
US6542722B1 (en) 1998-10-21 2003-04-01 Parkervision, Inc. Method and system for frequency up-conversion with variety of transmitter configurations
US6061555A (en) 1998-10-21 2000-05-09 Parkervision, Inc. Method and system for ensuring reception of a communications signal
US6370371B1 (en) 1998-10-21 2002-04-09 Parkervision, Inc. Applications of universal frequency translation
US7039372B1 (en) 1998-10-21 2006-05-02 Parkervision, Inc. Method and system for frequency up-conversion with modulation embodiments
US6560301B1 (en) 1998-10-21 2003-05-06 Parkervision, Inc. Integrated frequency translation and selectivity with a variety of filter embodiments
US6813485B2 (en) 1998-10-21 2004-11-02 Parkervision, Inc. Method and system for down-converting and up-converting an electromagnetic signal, and transforms for same
US7236754B2 (en) 1999-08-23 2007-06-26 Parkervision, Inc. Method and system for frequency up-conversion
US6049706A (en) 1998-10-21 2000-04-11 Parkervision, Inc. Integrated frequency translation and selectivity
CA2356699C (en) 1998-12-24 2008-02-05 Telefonaktiebolaget Lm Ericsson Communication receiver having reduced dynamic range
US6704558B1 (en) 1999-01-22 2004-03-09 Parkervision, Inc. Image-reject down-converter and embodiments thereof, such as the family radio service
US6704549B1 (en) 1999-03-03 2004-03-09 Parkvision, Inc. Multi-mode, multi-band communication system
US6879817B1 (en) 1999-04-16 2005-04-12 Parkervision, Inc. DC offset, re-radiation, and I/Q solutions using universal frequency translation technology
US6853690B1 (en) 1999-04-16 2005-02-08 Parkervision, Inc. Method, system and apparatus for balanced frequency up-conversion of a baseband signal and 4-phase receiver and transceiver embodiments
US7110444B1 (en) 1999-08-04 2006-09-19 Parkervision, Inc. Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments and circuit implementations
US7693230B2 (en) 1999-04-16 2010-04-06 Parkervision, Inc. Apparatus and method of differential IQ frequency up-conversion
US7065162B1 (en) 1999-04-16 2006-06-20 Parkervision, Inc. Method and system for down-converting an electromagnetic signal, and transforms for same
US8295406B1 (en) 1999-08-04 2012-10-23 Parkervision, Inc. Universal platform module for a plurality of communication protocols
MY133723A (en) * 1999-09-17 2007-11-30 Ericsson Telefon Ab L M "apparatus and method for substantially eliminating a near-channel interfering amplitude modulated signal"
US6373909B2 (en) * 1999-10-22 2002-04-16 Telefonaktiebolaget Lm Ericsson (Publ) Communications terminal having a receiver and method for removing known interferers from a digitized intermediate frequency signal
US6631170B1 (en) * 1999-12-03 2003-10-07 Nokia Corporation Radio frequency receiver
US6259752B1 (en) * 2000-02-01 2001-07-10 Conexant Systems, Inc. System for cancelling internal interference in a receiver
US7010286B2 (en) 2000-04-14 2006-03-07 Parkervision, Inc. Apparatus, system, and method for down-converting and up-converting electromagnetic signals
GB2366460A (en) * 2000-08-24 2002-03-06 Nokia Mobile Phones Ltd DC compensation for a direct conversion radio receiver
US6600913B1 (en) * 2000-10-27 2003-07-29 Sony International (Europe) Gmbh Two-port demodulation device
EP1202445B1 (en) * 2000-10-30 2005-12-14 Texas Instruments France Device for cancelling DC-Offsets in a quadrature demodulator, and method
ATE315863T1 (de) * 2000-10-30 2006-02-15 Texas Instruments Inc Verfahren zur schätzung und entfernung eines zeitvarianten dc-offsets
US7454453B2 (en) 2000-11-14 2008-11-18 Parkervision, Inc. Methods, systems, and computer program products for parallel correlation and applications thereof
WO2002071713A2 (en) * 2001-03-01 2002-09-12 Broadcom Corporation Compensation of distortion due to channel and to receiver, in a parallel transmission system
US6731906B2 (en) * 2001-04-23 2004-05-04 University Corporation For Atmospheric Research Method and system for determining the phase and amplitude of a radio occultation signal
DE10128236A1 (de) * 2001-06-11 2002-08-01 Infineon Technologies Ag Verfahren zur Kompensation einer stufenförmigen DC-Störung in einem digitalen Basisbandsignal eines Homodyn-Funkempfängers
US7072427B2 (en) 2001-11-09 2006-07-04 Parkervision, Inc. Method and apparatus for reducing DC offsets in a communication system
US7356326B2 (en) * 2001-12-12 2008-04-08 Samsung Electronics Co., Ltd. Direct-conversion receiver for removing DC offset
US6959170B2 (en) * 2001-12-20 2005-10-25 Motorola, Inc. Communications receivers and methods therefor
US7460584B2 (en) 2002-07-18 2008-12-02 Parkervision, Inc. Networking methods and systems
US7379883B2 (en) 2002-07-18 2008-05-27 Parkervision, Inc. Networking methods and systems
US7043208B2 (en) * 2002-10-15 2006-05-09 Motorola, Inc. Method and apparatus to reduce interference in a communication device
EP1503508B1 (en) * 2003-07-30 2007-06-06 Texas Instruments Incorporated Reduction of dynamic DC offsets in a wireless receiver
US7680456B2 (en) * 2005-02-16 2010-03-16 Texas Instruments Incorporated Methods and apparatus to perform signal removal in a low intermediate frequency receiver
CN101142834B (zh) * 2005-04-26 2010-05-12 中兴通讯股份有限公司 多路基带数据交换器及多路基带数据交换方法
KR101261527B1 (ko) * 2006-10-27 2013-05-06 삼성전자주식회사 직접 변환 구조의 ｒｆ 쿼드러쳐 송수신기에서 부정합을보상하는 방법 및 장치
KR100808244B1 (ko) * 2006-12-15 2008-03-03 한국과학기술원 다중 모드에 따른 입력 임피던스 매칭을 이용하는 무선식별 시스템
GB0803710D0 (en) * 2008-02-28 2008-04-09 Nokia Corp DC compensation
CN101741788B (zh) * 2009-11-27 2012-10-03 许昌学院 最小频移键控信号的调制解调方法及专用的复解析带通滤波器设计方法
WO2014160042A2 (en) * 2013-03-14 2014-10-02 Mirza M Zubair Internet based disease monitoring system (idms)
RU2542939C1 (ru) * 2013-10-09 2015-02-27 Общество с ограниченной ответственностью "Алсет Веллен" Приемник прямого преобразования с квадратурно-трехфазной архитектурой, способ прямого преобразования сигнала посредством указанного приемника и способ управления настройкой указанного приемника
US10317535B2 (en) 2016-03-31 2019-06-11 Samsung Electronics Co., Ltd Method and apparatus for second order intercept point (IP2) calibration
KR20240078786A (ko) 2022-11-28 2024-06-04 주식회사 피오 다공성 멤브레인 초음파진동 절단장치

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1536850A (en) * 1975-09-15 1978-12-20 Racal Instruments Ltd Electrical measuring and noise suppression circuitry
US4416017A (en) * 1981-01-05 1983-11-15 Motorola, Inc. Apparatus and method for attenuating interfering signals
DE3240565C2 (de) * 1982-11-03 1985-12-12 Telefunken electronic GmbH, 6000 Frankfurt Direktmischender Synchronempfänger
GB2149244B (en) * 1983-10-29 1987-01-21 Standard Telephones Cables Ltd Digital demodulator arrangement for quadrature signals
JPS61171207A (ja) * 1985-01-25 1986-08-01 Nec Corp 受信機
US4736455A (en) * 1985-12-23 1988-04-05 Nippon Telegraph And Telephone Corporation Interference cancellation system
JPH0630449B2 (ja) * 1987-03-03 1994-04-20 富士通株式会社 干渉検出装置
GB8728577D0 (en) * 1987-12-07 1988-01-13 Secr Defence Improvements in/relating to modulation enhancement
NL8802531A (nl) * 1988-10-14 1990-05-01 Philips Nv Fasedetector en frequentiedemodulator voorzien van zulk een fasedetector.
GB9015059D0 (en) * 1990-07-09 1990-08-29 C Com Group Plc Radio receivers
US5241702A (en) * 1990-09-06 1993-08-31 Telefonaktiebolaget L M Ericsson D.c. offset compensation in a radio receiver
FI98580C (fi) * 1991-11-14 1997-07-10 Nokia Mobile Phones Ltd Selektiivisyyssuodatus solukkopuhelimessa
DE69228816T2 (de) * 1992-10-28 1999-08-19 Alcatel Offsetgleichspannungskorrektur für Direktmisch-TDMA-Empfänger
DE4238542C1 (de) * 1992-11-14 1994-06-09 Hagenuk Telecom Gmbh Verfahren und Vorrichtung zur Korrektur von Gleichspannungs-Fehlersignalen bei direktmischenden Empfangseinrichtungen
JPH06177787A (ja) * 1992-12-01 1994-06-24 Nippon Telegr & Teleph Corp <Ntt> 干渉補償回路
US5369411A (en) * 1993-06-01 1994-11-29 Westinghouse Electric Corporation Imbalance correction of in-phase and quadrature phase return signals

Also Published As

Publication number Publication date
EP1391997B1 (en) 2006-10-04
CN1146119C (zh) 2004-04-14
EP0835557A1 (en) 1998-04-15
CN1392672A (zh) 2003-01-22
FI972786A (fi) 1997-08-22
AU698865B2 (en) 1998-11-12
EP1391997A3 (en) 2004-06-02
JPH10513616A (ja) 1998-12-22
EP0835557B1 (en) 2004-06-16
KR100379723B1 (ko) 2003-06-09
US5579347A (en) 1996-11-26
DE69535256D1 (de) 2006-11-16
CA2208850A1 (en) 1996-07-04
AU4359696A (en) 1996-07-19
FI972786A0 (fi) 1997-06-27
NO972985L (no) 1997-08-25
BR9510108A (pt) 1997-11-25
EP1391997A2 (en) 2004-02-25
CN1175328A (zh) 1998-03-04
PL321059A1 (en) 1997-11-24
PL184618B1 (pl) 2002-11-29
DE69533175D1 (de) 2004-07-22
NO972985D0 (no) 1997-06-26
WO1996020539A1 (en) 1996-07-04
RU2146416C1 (ru) 2000-03-10
DE69533175T2 (de) 2005-07-14
CN1086066C (zh) 2002-06-05
MX9704753A (es) 1997-10-31

Similar Documents

Publication Publication Date Title
FI114670B (fi) Digitaalinen kompensointi suoramuuntovastaanottimessa
CA2259608C (en) Method and apparatus for compensating for a varying d.c. offset in a sampled signal
KR100780117B1 (ko) 각도 변조 ｒｆ 신호 수신기
CA2273671C (en) Local oscillator leak cancellation circuit
WO2001020795A2 (en) Apparatus for interference compensation of a direct conversion transceiver and method
JPH11234150A (ja) デジタル復調装置
JP6530986B2 (ja) 無線受信装置、電子機器、及び無線受信方法
US10263654B2 (en) Radio receiver and intermediate frequency selection method
KR100888504B1 (ko) 다중 모드 무선랜을 위한 적응형 전압 참조값을 갖는 자동이득 조절 장치 및 방법
KR19990060369A (ko) 디지탈 이동 통신 시스템에서의 수신 신호의 이득 자동 제어장치
MXPA97004753A (en) Receiver of direct conversion, compensated digitalme
Pascht et al. Estimation and compensation of IQ-imbalances in direct down
Chiu et al. Adaptive estimation/compensation scheme of IQ imbalance with frequency offset in communication receivers

Legal Events

Date Code Title Description
FG Patent granted

Ref document number: 114670

Country of ref document: FI

MA Patent expired