NO975224L - Estimeringskrets for kvadraturmodulasjonsfeil, og modulatortrinn med slik krets - Google Patents

Estimeringskrets for kvadraturmodulasjonsfeil, og modulatortrinn med slik krets

Info

Publication number
NO975224L
NO975224L NO975224A NO975224A NO975224L NO 975224 L NO975224 L NO 975224L NO 975224 A NO975224 A NO 975224A NO 975224 A NO975224 A NO 975224A NO 975224 L NO975224 L NO 975224L
Authority
NO
Norway
Prior art keywords
signal
circuit
estimation circuit
modulation
quadrature modulation
Prior art date
Application number
NO975224A
Other languages
English (en)
Other versions
NO975224D0 (no
Inventor
Rossano Marchesani
Jean-Xavier Canonici
Original Assignee
Alsthom Cge Alcatel
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 Alsthom Cge Alcatel filed Critical Alsthom Cge Alcatel
Publication of NO975224D0 publication Critical patent/NO975224D0/no
Publication of NO975224L publication Critical patent/NO975224L/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
    • H04L27/36—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

Estimeringskrets (67) for eventuelle feil i en kvadraturmodulator og omfattende to blandere (62, 63) som tilføres to bære- signaler (Pl, P2) så vel som et modula- sjonssignal (X, Y). Utgangssignalet fra de to blandere påtrykkes et summeringsledd (66) slik at det dannes et kombinert modu- lert signal (SM). Estimeringskretsen (67) har i tillegg følgende elementer: - effektreguleringskretser (71) for å registrere et første signal som repre- senterer den momentane effekt av det kom- binerte modulerte signal (SM), - en signalgiver (74) for å frem- bringe et andre signal som er representa- tivt for et referanseomhylningsforløp for modulasjonssignalene (X, Y), - en amplituderegulator (77) for å regulere amplituden av et av signalene som funksjon av den gjennomsnittlige ampli- tudeforskjell som registreres mellom det amplitudekorrigerte signal og det andre signal, og - en prosessor (79) for signalbehand- ling av den registrerte amplitudefor- skjell, i form av et råfeilsignal (e) og tilveiebringe et utgangssignal (El) i samsvar med kvadraturmodulasjonsfeilen.
NO975224A 1996-11-14 1997-11-13 Estimeringskrets for kvadraturmodulasjonsfeil, og modulatortrinn med slik krets NO975224L (no)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9613868A FR2755808B1 (fr) 1996-11-14 1996-11-14 Estimateur d'un defaut de fonctionnement d'un modulateur en quadrature et etage de modulation l'utilisant

Publications (2)

Publication Number Publication Date
NO975224D0 NO975224D0 (no) 1997-11-13
NO975224L true NO975224L (no) 1998-05-15

Family

ID=9497607

Family Applications (1)

Application Number Title Priority Date Filing Date
NO975224A NO975224L (no) 1996-11-14 1997-11-13 Estimeringskrets for kvadraturmodulasjonsfeil, og modulatortrinn med slik krets

Country Status (6)

Country Link
US (1) US5883551A (no)
EP (1) EP0843448A1 (no)
JP (1) JPH10164159A (no)
CA (1) CA2218925A1 (no)
FR (1) FR2755808B1 (no)
NO (1) NO975224L (no)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI107100B (fi) 1999-03-26 2001-05-31 Nokia Networks Oy I/Q-modulaattorin vaihe- ja amplitudiepäbalanssin korjaus
GB2377103A (en) 2001-06-27 2002-12-31 Nokia Corp Tuning a station
US6657510B2 (en) * 2001-11-27 2003-12-02 Harris Corporation Corrective phase quadrature modulator system and method
US7657241B2 (en) * 2002-02-01 2010-02-02 Qualcomm, Incorporated Distortion reduction calibration
US6700453B2 (en) 2002-06-18 2004-03-02 Nokia Corporation Amplitude imbalance compensation of quadrature modulator
FR2905813A1 (fr) * 2006-09-12 2008-03-14 Alcatel Sa Dispositif de controle de la qualite d'une modulation
US9734859B2 (en) * 2013-11-26 2017-08-15 Oracle International Corporation Quadrature track error signal for optical recording media and devices
KR20170118913A (ko) * 2016-01-19 2017-10-25 후아웨이 테크놀러지 컴퍼니 리미티드 오차 보상 직접 디지털 변조 장치

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6436153A (en) * 1987-07-31 1989-02-07 Nec Corp Quadruple phase modulator
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
US5351016A (en) * 1993-05-28 1994-09-27 Ericsson Ge Mobile Communications Inc. Adaptively self-correcting modulation system and method
FR2729261A1 (fr) * 1995-01-11 1996-07-12 Alcatel Telspace Estimateur d'un defaut de fonctionnement d'un modulateur en quadrature et etage de modulation l'utilisant

Also Published As

Publication number Publication date
FR2755808A1 (fr) 1998-05-15
FR2755808B1 (fr) 1999-01-08
EP0843448A1 (fr) 1998-05-20
NO975224D0 (no) 1997-11-13
JPH10164159A (ja) 1998-06-19
CA2218925A1 (fr) 1998-05-14
US5883551A (en) 1999-03-16

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