NO964031L - Anordning for korreksjon av kvadraturfeil ved modulasjon/demodulasjon samt tilsvarende sender og mottager - Google Patents

Anordning for korreksjon av kvadraturfeil ved modulasjon/demodulasjon samt tilsvarende sender og mottager

Info

Publication number
NO964031L
NO964031L NO964031A NO964031A NO964031L NO 964031 L NO964031 L NO 964031L NO 964031 A NO964031 A NO 964031A NO 964031 A NO964031 A NO 964031A NO 964031 L NO964031 L NO 964031L
Authority
NO
Norway
Prior art keywords
correction
quadrature
demodulation
receiver
levels
Prior art date
Application number
NO964031A
Other languages
English (en)
Other versions
NO964031D0 (no
Inventor
Patrick Janer
Original Assignee
Alcatel Telspace
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 Alcatel Telspace filed Critical Alcatel Telspace
Publication of NO964031D0 publication Critical patent/NO964031D0/no
Publication of NO964031L publication Critical patent/NO964031L/no

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
    • H04L27/38—Demodulator circuits; Receiver circuits
    • H04L27/3845—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier
    • H04L27/3854—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier using a non - coherent carrier, including systems with baseband correction for phase or frequency offset
    • H04L27/3863—Compensation for quadrature error in the received signal
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0016—Stabilisation of local oscillators

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

Oppfinnelsen gjelder en anordning for korreksjon av kvadraturfeil i en kvadraturmodulator og/eller demodulator for et signal med flere fasetilstander eller amplitude- og fasetilstander. Korreksjonsanordningen omfatter behandlingsutstyr (51) som når oppfinnelsen utnyttes for å korrigere kvadraturfeil i en demodulator, omformer nivåene P og Q av de digitale signaler som avgis fra demodulasjonstrinnet, til korrigerte nivåer P' og Q' ifølge et hvilket som helst av de etterfølgende åtte forhold.Disse korrigerte verdier tilføres så beslutningsutstyr (72) eventuelt etter at deres maksimumsnivåer er blitt utlignet. Oppfinnelsen kombinerer korreksjonsnøyaktighet med lav pris og den muliggjør korreksjon av en hvilken som helst kvadraturfeil.
NO964031A 1995-09-27 1996-09-25 Anordning for korreksjon av kvadraturfeil ved modulasjon/demodulasjon samt tilsvarende sender og mottager NO964031L (no)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9511315A FR2739239B1 (fr) 1995-09-27 1995-09-27 Dispositif de correction d'un defaut de quadrature d'un modulateur en quadrature et/ou d'un demodulateur d'un signal a pluralite d'etats de phase, emetteur et recepteur correspondants

Publications (2)

Publication Number Publication Date
NO964031D0 NO964031D0 (no) 1996-09-25
NO964031L true NO964031L (no) 1997-04-01

Family

ID=9482953

Family Applications (1)

Application Number Title Priority Date Filing Date
NO964031A NO964031L (no) 1995-09-27 1996-09-25 Anordning for korreksjon av kvadraturfeil ved modulasjon/demodulasjon samt tilsvarende sender og mottager

Country Status (6)

Country Link
US (1) US5705958A (no)
EP (1) EP0766433A1 (no)
JP (1) JPH09116580A (no)
CA (1) CA2186634A1 (no)
FR (1) FR2739239B1 (no)
NO (1) NO964031L (no)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5987069A (en) * 1996-12-24 1999-11-16 Gte Government Systems Corporation Method and apparatus for variably allocating upstream and downstream communication spectra
AU739051B2 (en) * 1996-12-24 2001-10-04 General Dynamics Government Systems Corporation Symbol lock detector
US6160855A (en) * 1997-02-06 2000-12-12 Mitsubishi Materials Corporation Digital modulation method and digital communication system
US6304594B1 (en) 1998-07-27 2001-10-16 General Dynamics Government Systems Corporation Interference detection and avoidance technique
US6298096B1 (en) 1998-11-19 2001-10-02 Titan Corporation Method and apparatus for determination of predistortion parameters for a quadrature modulator
US6212229B1 (en) 1998-12-16 2001-04-03 General Dynamics Government Systems Corporation Adaptive pre-emphasis technique
US6512800B1 (en) * 1999-03-12 2003-01-28 Lucent Technologies Inc. Method and system for correcting phase and amplitude imbalances of a quadrature modulated RF signal
US6671336B1 (en) * 2000-05-16 2003-12-30 Motorola, Inc. Gain controller for circuit having in-phase and quadrature channels, and method
CN1235378C (zh) 2000-11-03 2006-01-04 高通股份有限公司 对载波信号的幅度和相位误差具有低灵敏度的调制器
US7382833B1 (en) * 2001-08-16 2008-06-03 Rockwell Collins, Inc. System for phase, gain, and DC offset error correction for a quadrature modulator
DE10342583B4 (de) * 2003-09-15 2006-01-26 Infineon Technologies Ag Verfahren zur Trägerrestbestimmung in einer einen Vektormodulator umfassenden Anordnung
JP6291990B2 (ja) * 2014-04-15 2018-03-14 富士通株式会社 通信システム、受信装置および半導体装置
JP6340689B2 (ja) * 2014-05-23 2018-06-13 パナソニックＩｐマネジメント株式会社 パルスレーダ装置、およびパルスレーダ装置の制御方法
US11418281B2 (en) * 2021-02-19 2022-08-16 Ultralogic 6G, Llc Error correction by merging copies of 5G/6G messages

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2652965A1 (fr) * 1989-10-06 1991-04-12 Philips Electronique Lab Dispositif de predistorsion pour systeme de transmission numerique.
US5077757A (en) * 1990-07-30 1991-12-31 Motorola, Inc. System for synthesizing a modulated signal
US5111155A (en) * 1991-03-04 1992-05-05 Motorola, Inc. Distortion compensation means and method
DE69222452T2 (de) * 1991-03-11 1998-02-26 Nippon Telegraph & Telephone Quadraturamplitudenmodulator mit Verzerrungskompensation
JPH05327808A (ja) * 1992-05-20 1993-12-10 Nec Corp 直交変調回路
US5371481A (en) * 1993-03-24 1994-12-06 Nokia Mobile Phones Ltd. Tuning techniques for I/Q channel signals in microwave digital transmission systems
FR2711027B1 (fr) * 1993-10-05 1995-11-17 Ebauchesfabrik Eta Ag Circuit de correction du déphasage et des amplitudes.

Also Published As

Publication number Publication date
FR2739239B1 (fr) 1997-11-14
US5705958A (en) 1998-01-06
FR2739239A1 (fr) 1997-03-28
NO964031D0 (no) 1996-09-25
EP0766433A1 (fr) 1997-04-02
JPH09116580A (ja) 1997-05-02
CA2186634A1 (fr) 1997-03-28

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