ES2080097T3 - Modulador qam con supresion de moduladora mejorada. - Google Patents

Modulador qam con supresion de moduladora mejorada.

Info

Publication number
ES2080097T3
ES2080097T3 ES90123641T ES90123641T ES2080097T3 ES 2080097 T3 ES2080097 T3 ES 2080097T3 ES 90123641 T ES90123641 T ES 90123641T ES 90123641 T ES90123641 T ES 90123641T ES 2080097 T3 ES2080097 T3 ES 2080097T3
Authority
ES
Spain
Prior art keywords
modulator
double
paths
partial
path
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 - Lifetime
Application number
ES90123641T
Other languages
English (en)
Inventor
Fred-Egon Dr Muller
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.)
Alcatel Lucent NV
Original Assignee
Alcatel NV
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 NV filed Critical Alcatel NV
Application granted granted Critical
Publication of ES2080097T3 publication Critical patent/ES2080097T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime 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

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)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

UNA FASE DE MODULADOR IDONEA PARA MODULACION DE AMPLITUDES EN CUADRATURA 16 (AQM) ESTA CONSTITUIDA COMO FASE DE MODULADOR DOBLE (1), ESTANDO CONSTITUIDO UN MODULADOR 16 QAM (39) DE DOS FASES DE MODULADOR DOBLES (1). UNA FASE DE MODULADOR DOBLE (1) PRESENTA DOS FASES DE MODULADOR PARCIALES (1'', 1") QUE FORMAN UN PUENTE, CADA FASE DE MODULADOR PARCIAL (1'', 1") PRESENTA DOS VIAS DE TRANSMISION POSIBLES, UNA VIA ELECTRICAMENTE CORTA (7'', 7") Y UNA VIA DE RETARDO DE FASE (6'', 6") CON UN MIEMBRO DE RETARDO DE FASE (39'', 39") QUE LLEVA A CABO UN DESPLAZAMIENTO DE FASE DE 180 . EN CADA UNA DE LAS DOS VIAS (6'', 6", 7'', 7") ESTA DISPUESTO UN DIODO SEMICONDUCTOR (D1'', D1", D2'', D2"), DE TAL FORMA QUE VEN A LA PORTADORA (U SUB C) CON FASE DESPLAZADA 180 J, CUANDO NO EXISTE NINGUNA TENSION DE MODULACION (U SUB M), CON LO QUE LA PORTADORA SE SUPRIME EN LA SALIDA DE LA SEÑAL (3'') . EN CASO DE QUE EXISTA UNA SEÑAL DE MODULACION (U SUB M), LA COMPENSACION SE DESTRUYE EN EL CONTRAIMPULSO DE RELOJ, Y UNA DE LAS DOS VIAS (6'', 6") TIENE UNA RESISTENCIA MAS BAJA QUE LA OTRA (7'', 7"), LO QUE CONDUCE A LA GENERACION DE LA TENSION DE LA PORTADORA MODULADA (U SUB MC) . MEDIANTE LA CONFIGURACION COMO FASE DE MODULADOR DOBLE (1), DE TAL FORMA QUE LA VIA DE TRANSMISION SE REALIZA, RESPECTIVAMENTE, SOBRE UNA VIA ELECTRICAMENTE CORTA (7'', 7") DE UNA FASE DE MODULADOR PARCIAL Y UNA VIA DE RETARDO DE FASE (6", 6'') DE LA OTRA FASE DE MODULACION PARCIAL (1'', 1") O VICEVERSA, SE PROMEDIAN DIFERENCIAS DE LAS DOS VIAS. LA FASE DE MODULADOR DOBLE DE CONTRAIMPULSO DE RELOJ (1) SE EMPLEA EN RADIOTRANSMISION DIRECCIONAL. LA FASE DE MODULADOR (1) SE PUEDE EMPLEAR TAMBIEN COMO FASE MIXTA.
ES90123641T 1989-12-14 1990-12-08 Modulador qam con supresion de moduladora mejorada. Expired - Lifetime ES2080097T3 (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3941281 1989-12-14
DE4028370A DE4028370A1 (de) 1989-12-14 1990-09-07 Modulator- und mischstufe

Publications (1)

Publication Number Publication Date
ES2080097T3 true ES2080097T3 (es) 1996-02-01

Family

ID=25887969

Family Applications (1)

Application Number Title Priority Date Filing Date
ES90123641T Expired - Lifetime ES2080097T3 (es) 1989-12-14 1990-12-08 Modulador qam con supresion de moduladora mejorada.

Country Status (6)

Country Link
US (1) US5153536A (es)
EP (1) EP0432674B1 (es)
JP (1) JP2856921B2 (es)
AT (1) ATE127989T1 (es)
DE (2) DE4028370A1 (es)
ES (1) ES2080097T3 (es)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9026037D0 (en) * 1990-11-30 1991-01-16 Marconi Gec Ltd Motion detector unit
FI90165C (fi) * 1991-12-13 1993-12-27 Nokia Mobile Phones Ltd I/q-modulator och demodulator
US5450044A (en) * 1993-04-14 1995-09-12 Acrodyne Industries, Inc. Quadrature amplitude modulator including a digital amplitude modulator as a component thereof
US5469127A (en) * 1992-08-04 1995-11-21 Acrodyne Industries, Inc. Amplification apparatus and method including modulator component
GB2281830B (en) * 1993-09-11 1998-08-12 Nokia Mobile Phones Ltd I/q-modulator and i/q-demodulator
GB2282287B (en) * 1993-09-25 1998-01-28 Nokia Mobile Phones Ltd A mixer
DE19739478C2 (de) * 1997-01-09 2002-08-14 Agilent Technologies Inc Schaltung zum Reduzieren des Übersprechens eines Lokaloszillatorsignals auf eine Zwischenfrequenzschaltungsanordnung
US7369624B2 (en) * 2004-06-01 2008-05-06 Orbital Sciences Corp. Carrier suppression type modulator with encoded modulating signals
DE102004054761B4 (de) * 2004-11-12 2009-04-09 Rohde & Schwarz Gmbh & Co. Kg PIN-Dioden-Pulsmodulator

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5563106A (en) * 1978-11-06 1980-05-13 Hitachi Ltd Mixer circuit
JPS58173906A (ja) * 1982-04-06 1983-10-12 Fujitsu Ltd 周波数変換器
DE4006723A1 (de) * 1990-03-03 1990-07-05 Bernd Mayer Doppelmischer
DE4028371A1 (de) * 1990-09-07 1992-03-12 Standard Elektrik Lorenz Ag Modulator- und mischstufe

Also Published As

Publication number Publication date
ATE127989T1 (de) 1995-09-15
JP2856921B2 (ja) 1999-02-10
US5153536A (en) 1992-10-06
JPH04100458A (ja) 1992-04-02
EP0432674A3 (en) 1992-11-25
EP0432674A2 (de) 1991-06-19
DE59009655D1 (de) 1995-10-19
EP0432674B1 (de) 1995-09-13
DE4028370A1 (de) 1991-06-20

Similar Documents

Publication Publication Date Title
MX170766B (es) Aparato de modulacion diferencial
SE9001305L (sv) Kvadraturmodulator
US6384954B1 (en) Optical modulator
KR960701546A (ko) I/Q 직교 위상 변조기 회로(I/Q quadraphase modulator circuit)
GB1246686A (en) Improvements in or relating to signal transmission circuits
MY123208A (en) Direct conversion receiver
EP0174612A3 (en) Composite shift keying communication system
ES2080097T3 (es) Modulador qam con supresion de moduladora mejorada.
EP0394605A3 (en) High-speed modulator of the polarization of an optical carrier
SE9802907L (sv) System för RF direkt nedkonvertering (Zero if)
ES463649A1 (es) Perfeccionamientos en circuitos compensadores de distorsion para trayectos de senal sujetos a distorsion.
US6157752A (en) Fiber optic link
GB946249A (en) Improvements relating to circuit arrangements for frequency translating a.c. signals
CA2050756A1 (en) Modulator using low-pass filter as delay element
US4021758A (en) Direct modulation 4 phase PSK modulator
RU2012150C1 (ru) Частотный модулятор
SU1181019A1 (ru) СВЧ-фазовый манипул тор
SU1160525A1 (ru) Однополосный модул тор СВЧ
JPS5610713A (en) Balanced modulator
SE9001405D0 (sv) 180 graders hybridkoppling
SU886195A1 (ru) Двухбалансный модул тор
KR940017248A (ko) 4위상 차분 직교위상쉬프트키잉 변복조기
SU799125A1 (ru) Устройство дл получени калиброванныхАМплиТудНО-МОдулиРОВАННыХ /AM/ ичАСТОТНО-МОдулиРОВАННыХ /чМ/ КОлЕбАНий
SU898586A1 (ru) Балансный модул тор
ES2056740A2 (es) Circuito analogico para realizar modulaciones vectoriales.

Legal Events

Date Code Title Description
FG2A Definitive protection

Ref document number: 432674

Country of ref document: ES