NO911890L - Fremgangsmaate for paavirkning av flernivaas digital modulasjon ved hjelp av en digital signalprosessor. - Google Patents

Fremgangsmaate for paavirkning av flernivaas digital modulasjon ved hjelp av en digital signalprosessor.

Info

Publication number
NO911890L
NO911890L NO91911890A NO911890A NO911890L NO 911890 L NO911890 L NO 911890L NO 91911890 A NO91911890 A NO 91911890A NO 911890 A NO911890 A NO 911890A NO 911890 L NO911890 L NO 911890L
Authority
NO
Norway
Prior art keywords
digital
modulation
symbols
multiviva
procedure
Prior art date
Application number
NO91911890A
Other languages
English (en)
Other versions
NO911890D0 (no
Inventor
Michelangelo Lo Curto
Marcello Salerno
Original Assignee
Sits Soc It Telecom Siemens
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 Sits Soc It Telecom Siemens filed Critical Sits Soc It Telecom Siemens
Publication of NO911890D0 publication Critical patent/NO911890D0/no
Publication of NO911890L publication Critical patent/NO911890L/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)
  • Transmitters (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

Fremgangsmåte og innretning for bevlrking av flernlvå- digltalmodulasjon og spesielt GAM modulasjon ved å anvende en mikroprosessor (DSP). Fremgangsmåten sørger for synkroniserlng av alle frekvensene og innbefatter en oversampllng av symbolene til "i fase" og "i kvadratur" kanaler og egnet digital filtrering derav. En digital bærebølge blir QAM modulert ved valg i strengen av symbolene som tilhører de digitalt filtrerte kanalene tatt med deres sanne negerte verdi. Symbolene blir så sendt til en digital/analog omformer (DAC) fulgt av et rekonstruksjonsfilter (FRIC) for å tilveiebringe korresponderende GAM modulert analog bærebølge.
NO91911890A 1990-05-18 1991-05-15 Fremgangsmaate for paavirkning av flernivaas digital modulasjon ved hjelp av en digital signalprosessor. NO911890L (no)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT20380A IT1240444B (it) 1990-05-18 1990-05-18 Procedimento per l'attuazione della modulazione digitale multilivello mediante un elaboratore di segnali numerici

Publications (2)

Publication Number Publication Date
NO911890D0 NO911890D0 (no) 1991-05-15
NO911890L true NO911890L (no) 1991-11-19

Family

ID=11166215

Family Applications (1)

Application Number Title Priority Date Filing Date
NO91911890A NO911890L (no) 1990-05-18 1991-05-15 Fremgangsmaate for paavirkning av flernivaas digital modulasjon ved hjelp av en digital signalprosessor.

Country Status (7)

Country Link
US (1) US5200978A (no)
EP (1) EP0458385B1 (no)
AU (1) AU636486B2 (no)
DE (1) DE69126916D1 (no)
IT (1) IT1240444B (no)
NO (1) NO911890L (no)
ZA (1) ZA913720B (no)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5253271A (en) * 1991-02-15 1993-10-12 Schlumberger Technology Corporation Method and apparatus for quadrature amplitude modulation of digital data using a finite state machine
US5838727A (en) * 1991-02-15 1998-11-17 Schlumberger Technology Corporation Method and apparatus for transmitting and receiving digital data over a bandpass channel
US5420887A (en) * 1992-03-26 1995-05-30 Pacific Communication Sciences Programmable digital modulator and methods of modulating digital data
US5418818A (en) * 1992-09-22 1995-05-23 Glenayre Electronics, Inc. Digital signal processor exciter
JPH0795667B2 (ja) * 1993-01-18 1995-10-11 日本電気株式会社 トランスバーサルフィルタ
US5778029A (en) * 1993-05-13 1998-07-07 Lockheed Martin Aerospace Corporation Signal conditioner with symbol addressed lookup table producing values which compensate linear and non-linear distortion using transversal filter
DE69534666T2 (de) * 1994-07-20 2006-06-29 Nippon Telegraph And Telephone Corp. Digitaler Quadraturmodulator
WO1996011527A1 (en) * 1994-10-07 1996-04-18 Massachusetts Institute Of Technology Quadrature sampling system and hybrid equalizer
FI98020C (fi) * 1995-06-06 1997-03-25 Nokia Mobile Phones Ltd Digitaalisen signaalin modulointimenetelmä ja modulaattori
EP1848171A1 (en) * 1995-07-12 2007-10-24 NEC Corporation Method and apparatus for multi-level quadrature amplitude modulation
EP0760567A3 (de) * 1995-08-30 2000-09-06 Siemens Aktiengesellschaft Digitaler QAM-modulator
JP3658859B2 (ja) * 1996-05-27 2005-06-08 ソニー株式会社 通信方法及び通信装置
EP0849955A3 (en) * 1996-12-17 2000-05-03 Lg Electronics Inc. Device and method for generating a composite color signal with digital QAM
EP0909067A4 (en) * 1997-02-27 2005-06-22 Matsushita Electric Ind Co Ltd MODULATOR AND MODULATION PROCESS
US6049573A (en) * 1997-12-11 2000-04-11 Massachusetts Institute Of Technology Efficient polyphase quadrature digital tuner
US6680971B1 (en) * 1998-05-18 2004-01-20 Sarnoff Corporation Passband equalizer for a vestigial sideband signal receiver
DE19946722A1 (de) 1999-09-29 2001-04-05 Infineon Technologies Ag Einrichtung und Verfahren zur spektralen Formung eines Sendesignals in einem Funksender
KR100630143B1 (ko) * 2002-09-30 2006-09-29 삼성전자주식회사 통신 시스템에서 셔플링 데이터의 수신 방법 및 장치
GB0320352D0 (en) 2003-09-01 2003-10-01 Secr Defence Digital modulation waveforms for use in ranging systems
DE202004016686U1 (de) * 2003-10-28 2005-01-20 Astro Strobel Kommunikationssysteme Gmbh QAM-Modulator
GB0612142D0 (en) 2006-06-20 2006-08-02 Secr Defence Spreading modulation spectrum control
FI118875B (fi) * 2006-09-26 2008-04-15 Vacon Oyj Invertterien rinnankytkentä
US11758240B2 (en) 2018-09-13 2023-09-12 Avago Technologies International Sales Pte. Limited Integrated video and data system

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU591082B2 (en) * 1984-11-22 1989-11-30 Jonathan R. Bramwell Data modem system
US4661948A (en) * 1985-02-12 1987-04-28 Fairchild Semiconductor Corporation Digital quadrature amplitude modulator
GB8505527D0 (en) * 1985-03-04 1985-04-03 Digital Equipment Corp Digitally implemented modulators
JP2510490B2 (ja) * 1985-04-10 1996-06-26 株式会社日立製作所 デイジタル変調器
US4626803A (en) * 1985-12-30 1986-12-02 General Electric Company Apparatus for providing a carrier signal with two digital data streams I-Q modulated thereon
US4808937A (en) * 1986-07-15 1989-02-28 Hayes Microcomputer Products, Inc. Phase-locked loop for a modem
US4748626A (en) * 1987-01-28 1988-05-31 Racal Data Communications Inc. Viterbi decoder with reduced number of data move operations

Also Published As

Publication number Publication date
AU7701491A (en) 1991-11-21
EP0458385B1 (en) 1997-07-23
NO911890D0 (no) 1991-05-15
ZA913720B (en) 1992-02-26
IT9020380A1 (it) 1991-11-18
EP0458385A2 (en) 1991-11-27
DE69126916D1 (de) 1997-08-28
AU636486B2 (en) 1993-04-29
US5200978A (en) 1993-04-06
IT9020380A0 (it) 1990-05-18
IT1240444B (it) 1993-12-16
EP0458385A3 (en) 1993-02-24

Similar Documents

Publication Publication Date Title
NO911890L (no) Fremgangsmaate for paavirkning av flernivaas digital modulasjon ved hjelp av en digital signalprosessor.
AU589084B2 (en) Multilevel modulator capable of producing a composite modulated signal comprising a quadrature amplitude modulated component and a phase modulated component
SE8504663D0 (sv) Modem for telefonsystem
ATE289458T1 (de) Frequenzmodulator unter verwendung eines digitalen filters zur wellenformung beim basisband
RU94042898A (ru) Демодулятор методом фазовой манипуляции
PL305556A1 (en) Psk demodulator
EP0748092A3 (en) Modulation method and modulator for digital signal
BR9712510A (pt) Transmissor/receptor de rádio e aparêlho para modular alternativamente um sinal transportador com um sinal analógico ou um sinal digital.
DE69912384D1 (de) Elektronische Digital-Analog Wandleranordnung für eine Basisbandübertragungskette
JPS6436153A (en) Quadruple phase modulator
AU4634589A (en) Digital to amplitude modulated analog converter
EP0279208A3 (en) Non-recursive half-band filter
JPS6468149A (en) Speed variable type clock recovery circuit
ATE51478T1 (de) Digitaler demodulator.
MY116925A (en) Apparatus for demodulating am data multiplexed modulated wave signal
NO963612L (no) Digital kvadraturamplitudemodulasjon
JPS5725755A (en) Waveform superposed fsk modulator
DE69401727D1 (de) Vorrichtung zur Beseitigung von Nachschwingungen in gefilterten EKG-Signalen
JPS57145492A (en) Color image pickup device
AU587418B2 (en) An apparatus for generating a velocity error signal
AU2631588A (en) Liquid phase carbon monoxide shift process
JPS644128A (en) Pcm modulation demodulation circuit
DE50213407D1 (de) Stereo multiplex encoder (MPX) zur FM Übertragung
DE3377326D1 (en) Digital direct rf-modulation method and circuit arrangement for carrying out said method
KR940002464Y1 (ko) 오프셋 에러 보상회로