NO963612L - Digital kvadraturamplitudemodulasjon - Google Patents

Digital kvadraturamplitudemodulasjon

Info

Publication number
NO963612L
NO963612L NO963612A NO963612A NO963612L NO 963612 L NO963612 L NO 963612L NO 963612 A NO963612 A NO 963612A NO 963612 A NO963612 A NO 963612A NO 963612 L NO963612 L NO 963612L
Authority
NO
Norway
Prior art keywords
qam
digital
signal
amplitude modulation
quadrature amplitude
Prior art date
Application number
NO963612A
Other languages
English (en)
Other versions
NO963612D0 (no
Inventor
Karlheinz Borst
Stefan Hoffmann
Uwe Lehmann
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Publication of NO963612D0 publication Critical patent/NO963612D0/no
Publication of NO963612L publication Critical patent/NO963612L/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
    • H04L27/365—Modulation using digital generation of the modulated carrier (not including modulation of a digitally generated carrier)

Landscapes

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

Abstract

Vanlige QAM-modulatorer omfatter to blandere i hvilke hvert datasignal multipliseres med en av to innbyrdes ortogonale bærere. Deretter blir de genererte modulasjonsprodukter kombinert til et QAM-signal ved addisjon. Ved modulasjonsmetoder med høyere trinn (64-QAM og 256-QAM) blir det til signalbehandlingen stilt meget høye krav med hensyn til bærerfase, nivåforskjell av basisbåndkanalen og linearitet og som bare oppfylles ved kostbar testfelttrimming og valg av egnede komponenter. I henhold til oppfinnelsen foreslås det en i digital teknikk oppbygget QAM-modulator som etter digitalfiltrering av basisbåndsignalene på inngangssiden rommer en multiplekser med etterkoblet korreksjonsledd, digital/analogomformer og et analogt lavpassfilter.
NO963612A 1995-08-30 1996-08-29 Digital kvadraturamplitudemodulasjon NO963612L (no)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19531997 1995-08-30

Publications (2)

Publication Number Publication Date
NO963612D0 NO963612D0 (no) 1996-08-29
NO963612L true NO963612L (no) 1997-03-03

Family

ID=7770814

Family Applications (1)

Application Number Title Priority Date Filing Date
NO963612A NO963612L (no) 1995-08-30 1996-08-29 Digital kvadraturamplitudemodulasjon

Country Status (4)

Country Link
EP (1) EP0760567A3 (no)
CN (1) CN1074623C (no)
AU (1) AU712700B2 (no)
NO (1) NO963612L (no)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19732894C2 (de) 1997-07-30 1999-11-11 Siemens Ag Verfahren und Anordnungen zum schnellen Synchronisieren zweier Trägersignale
DE19732895C2 (de) * 1997-07-30 1999-05-12 Siemens Ag Anordnung zur schnellen digitalen Erzeugung eines digitalen Signals mit vorgebbarer Phasenlage mit Hilfe eines Referenz-Trägersignals
US6763072B1 (en) * 1999-08-25 2004-07-13 Victor Company Of Japan, Ltd. Method and apparatus for modulation and demodulation related to orthogonal frequency division multiplexing
DE50206555D1 (de) * 2002-02-06 2006-06-01 Abb Schweiz Ag Verfahren zum Erzeugen und Einrichtung zum Empfangen eines anisochronen binären Signals
KR100454483B1 (ko) 2002-03-04 2004-10-28 삼성전자주식회사 아이/큐 복조장치 및 그의 아이/큐 신호생성방법

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0234539B2 (ja) * 1984-03-02 1990-08-03 Oki Electric Ind Co Ltd Deijitarushorigatachotsukohenchosochi
SE465494B (sv) * 1990-01-22 1991-09-16 Ericsson Telefon Ab L M Foerfarande att kompensera foer olineariteter i en slutfoerstaerkare
JPH03265332A (ja) * 1990-03-15 1991-11-26 Fujitsu Ltd ディジタル位相変調回路
IT1240444B (it) * 1990-05-18 1993-12-16 Borsano Corrado Procedimento per l'attuazione della modulazione digitale multilivello mediante un elaboratore di segnali numerici
JPH06104943A (ja) * 1992-09-21 1994-04-15 Nec Corp 四相位相変調装置
US5371481A (en) * 1993-03-24 1994-12-06 Nokia Mobile Phones Ltd. Tuning techniques for I/Q channel signals in microwave digital transmission systems
DE69433082T2 (de) * 1993-11-30 2004-06-03 Nec Corp. Adaptive Linearisierung eines Quadraturmodulators
DE69534666T2 (de) * 1994-07-20 2006-06-29 Nippon Telegraph And Telephone Corp. Digitaler Quadraturmodulator

Also Published As

Publication number Publication date
EP0760567A3 (de) 2000-09-06
CN1152209A (zh) 1997-06-18
CN1074623C (zh) 2001-11-07
EP0760567A2 (de) 1997-03-05
AU712700B2 (en) 1999-11-11
NO963612D0 (no) 1996-08-29
AU6434396A (en) 1997-03-06

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