DE69222452T2 - Quadraturamplitudenmodulator mit Verzerrungskompensation - Google Patents

Quadraturamplitudenmodulator mit Verzerrungskompensation

Info

Publication number
DE69222452T2
DE69222452T2 DE69222452T DE69222452T DE69222452T2 DE 69222452 T2 DE69222452 T2 DE 69222452T2 DE 69222452 T DE69222452 T DE 69222452T DE 69222452 T DE69222452 T DE 69222452T DE 69222452 T2 DE69222452 T2 DE 69222452T2
Authority
DE
Germany
Prior art keywords
distortion compensation
quadrature amplitude
amplitude modulator
modulator
quadrature
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.)
Expired - Fee Related
Application number
DE69222452T
Other languages
English (en)
Other versions
DE69222452D1 (de
Inventor
Hiroshi Suzuki
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Publication of DE69222452D1 publication Critical patent/DE69222452D1/de
Application granted granted Critical
Publication of DE69222452T2 publication Critical patent/DE69222452T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/36—Modulator circuits; Transmitter circuits
    • H04L27/362—Modulation using more than one carrier, e.g. with quadrature carriers, separately amplitude modulated
    • H04L27/364—Arrangements for overcoming imperfections in the modulator, e.g. quadrature error or unbalanced I and Q levels

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
DE69222452T 1991-03-11 1992-03-11 Quadraturamplitudenmodulator mit Verzerrungskompensation Expired - Fee Related DE69222452T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4525091 1991-03-11

Publications (2)

Publication Number Publication Date
DE69222452D1 DE69222452D1 (de) 1997-11-06
DE69222452T2 true DE69222452T2 (de) 1998-02-26

Family

ID=12714026

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69222452T Expired - Fee Related DE69222452T2 (de) 1991-03-11 1992-03-11 Quadraturamplitudenmodulator mit Verzerrungskompensation

Country Status (3)

Country Link
US (1) US5293406A (de)
EP (1) EP0503588B1 (de)
DE (1) DE69222452T2 (de)

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DE102004021225B4 (de) * 2004-04-30 2016-06-16 Advanced Micro Devices, Inc. DC-Offsetannullierung für WLAN-Kommunikationsgeräte

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US6700453B2 (en) * 2002-06-18 2004-03-02 Nokia Corporation Amplitude imbalance compensation of quadrature modulator
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US7010278B2 (en) * 2002-10-25 2006-03-07 Freescale Semiconductor, Inc. Sideband suppression method and apparatus for quadrature modulator using magnitude measurements
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JP4376689B2 (ja) * 2004-04-21 2009-12-02 富士通株式会社 直交変調システム
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JP4574471B2 (ja) * 2004-09-17 2010-11-04 株式会社日立国際電気 歪補償直交変調器及び無線送信機
DE102004059088A1 (de) * 2004-12-03 2006-06-08 Deutsche Telekom Ag Verfahren für eine optimale Ansteuerung bei Leistungsverstärkern für digitale Übertragung
US7725079B2 (en) * 2004-12-14 2010-05-25 Quellan, Inc. Method and system for automatic control in an interference cancellation device
US7522883B2 (en) * 2004-12-14 2009-04-21 Quellan, Inc. Method and system for reducing signal interference
US20070121757A1 (en) * 2005-11-29 2007-05-31 Lichung Chu Calibration apparatus and method for quadrature modulation system
CA2576778C (en) * 2006-02-07 2014-09-02 Xinping Huang Self-calibrating multi-port circuit and method
KR100889742B1 (ko) * 2006-02-08 2009-03-24 한국전자통신연구원 Ｉ/ｑ 변조 장치 및 방법
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US9252983B2 (en) * 2006-04-26 2016-02-02 Intersil Americas LLC Method and system for reducing radiated emissions from a communications channel
JP4916962B2 (ja) * 2007-06-26 2012-04-18 日本電波工業株式会社 信号処理部及び無線機
US8681894B2 (en) 2009-11-03 2014-03-25 Telefonaktiebolaget L M (Publ) Digital affine transformation modulated power amplifier for wireless communications
US11012201B2 (en) * 2013-05-20 2021-05-18 Analog Devices, Inc. Wideband quadrature error detection and correction
US9300444B2 (en) 2013-07-25 2016-03-29 Analog Devices, Inc. Wideband quadrature error correction
TWI819181B (zh) * 2020-01-06 2023-10-21 瑞昱半導體股份有限公司 傳收器和傳收器校正方法
US11374803B2 (en) 2020-10-16 2022-06-28 Analog Devices, Inc. Quadrature error correction for radio transceivers
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FR2641923B1 (fr) * 1989-01-19 1991-03-22 Alcatel Thomson Faisceaux Procede d'asservissement des parametres d'un modulateur a 2n etats de phase et d'amplitude, et dispositif de mise en oeuvre de ce procede
FR2644638B1 (de) * 1989-03-14 1991-05-31 Labo Electronique Physique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004021225B4 (de) * 2004-04-30 2016-06-16 Advanced Micro Devices, Inc. DC-Offsetannullierung für WLAN-Kommunikationsgeräte

Also Published As

Publication number Publication date
DE69222452D1 (de) 1997-11-06
EP0503588A3 (en) 1993-07-07
US5293406A (en) 1994-03-08
EP0503588B1 (de) 1997-10-01
EP0503588A2 (de) 1992-09-16

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee