ES2118050A1 - Modulador autoajustable y metodo de modulacion autoajustable - Google Patents

Modulador autoajustable y metodo de modulacion autoajustable

Info

Publication number
ES2118050A1
ES2118050A1 ES09650006A ES9650006A ES2118050A1 ES 2118050 A1 ES2118050 A1 ES 2118050A1 ES 09650006 A ES09650006 A ES 09650006A ES 9650006 A ES9650006 A ES 9650006A ES 2118050 A1 ES2118050 A1 ES 2118050A1
Authority
ES
Spain
Prior art keywords
modulation
receiver
error
self
cartesian
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.)
Granted
Application number
ES09650006A
Other languages
English (en)
Other versions
ES2118050B1 (es
Inventor
Paul W Dent
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.)
Ericsson Inc
Original Assignee
Ericsson Inc
Ericsson GE Mobile Communications Holding Inc
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 Ericsson Inc, Ericsson GE Mobile Communications Holding Inc filed Critical Ericsson Inc
Priority claimed from PCT/US1994/006409 external-priority patent/WO1995034126A1/en
Priority claimed from SG1996007772A external-priority patent/SG54285A1/en
Publication of ES2118050A1 publication Critical patent/ES2118050A1/es
Application granted granted Critical
Publication of ES2118050B1 publication Critical patent/ES2118050B1/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

UN MODULADOR DE CUADRATURA AUTOAJUSTABLE Y UN METODO DE MODULACION AUTOAJUSTABLE MEJORAN LA EXACTITUD CON LA QUE SE IMPRIMEN DATOS DIGITALES SOBRE UNA PORTADORA DE RF, LO CUAL ES PARTICULARMENTE UTIL PARA SISTEMAS QUE TIENEN DESMODULADORES VITERBI INTEGRADORES DE ECO Y PARA SISTEMAS QUE UTILIZAN TECNICAS CDMA SUBSTRACTIVAS. EL METODO Y EL APARATO IMPLICAN RECIBIR UNA TRANSMISION PROPIA CON UN RECEPTOR DE EVALUACION DE MODULACION ADECUADO Y DETERMINAR EL ERROR DE MODULACION CON RELACION A LA TRANSMISION TEORICAMENTE PERFECTA ESPERADA POR EL RECEPTOR. EL ERROR MEDIDO SE UTILIZA PARA AJUSTAR LA MODULACION A FIN DE MINIMIZAR EL ERROR. EL RECEPTOR DE EVALUACION DE MODULACION PUEDE UTILIZAR UN PROCESAMIENTO LOO-POLAR DE SEÑALES PARA MEDIR LA FASE Y LA AMPLITUD LOGARITMICA EN LUGAR DE COMPONENTES I Y Q CARTESIANOS, Y LUEGO REALIZAR UNA CONVERSION A LA FORMA CARTESIANA. ADEMAS, LOS FACTORES DE CORRECCION DETERMINADOS POR EL RECEPTOR DE EVALUACION DE MODULACION PUEDEN SER IDENTIFICADOS DIRECTAMENTECON CIERTOS COMPONENTES DE TRANSFORMADA PRODUCIDOS POR LA TRANSFORMADA RAPIDA DE WALSH.
ES09650006A 1994-06-06 1994-06-06 Modulador autoajustable y metodo de modulacion autoajustable Expired - Lifetime ES2118050B1 (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/US1994/006409 WO1995034126A1 (en) 1993-05-28 1994-06-06 Self-adjusting modulator
SG1996007772A SG54285A1 (en) 1994-06-06 1994-06-06 Self-adjusting modulator

Publications (2)

Publication Number Publication Date
ES2118050A1 true ES2118050A1 (es) 1998-09-01
ES2118050B1 ES2118050B1 (es) 1999-04-16

Family

ID=26665119

Family Applications (1)

Application Number Title Priority Date Filing Date
ES09650006A Expired - Lifetime ES2118050B1 (es) 1994-06-06 1994-06-06 Modulador autoajustable y metodo de modulacion autoajustable

Country Status (1)

Country Link
ES (1) ES2118050B1 (es)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0379114A1 (fr) * 1989-01-19 1990-07-25 Alcatel Telspace Procédé d'asservissement des paramètres d'un modulateur à 2n états de phase et d'amplitude, et dispositif de mise en oeuvre de ce procédé
US5048059A (en) * 1988-09-19 1991-09-10 Telefonaktiebolaget Lm Ericsson Log-polar signal processing
EP0495687A2 (en) * 1991-01-18 1992-07-22 Nec Corporation Oversampling DA converter with operational amplifier driven by a single reference voltage
EP0503588A2 (en) * 1991-03-11 1992-09-16 Nippon Telegraph And Telephone Corporation Quadrature amplitude modulator with distortion compensation
US5151919A (en) * 1990-12-17 1992-09-29 Ericsson-Ge Mobile Communications Holding Inc. Cdma subtractive demodulation
EP0598585A2 (en) * 1992-11-16 1994-05-25 Linear Modulation Technology Ltd Automatic calibration of the quadrature balance within a cartesian amplifier
US5351016A (en) * 1993-05-28 1994-09-27 Ericsson Ge Mobile Communications Inc. Adaptively self-correcting modulation system and method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5048059A (en) * 1988-09-19 1991-09-10 Telefonaktiebolaget Lm Ericsson Log-polar signal processing
EP0379114A1 (fr) * 1989-01-19 1990-07-25 Alcatel Telspace Procédé d'asservissement des paramètres d'un modulateur à 2n états de phase et d'amplitude, et dispositif de mise en oeuvre de ce procédé
US5151919A (en) * 1990-12-17 1992-09-29 Ericsson-Ge Mobile Communications Holding Inc. Cdma subtractive demodulation
EP0495687A2 (en) * 1991-01-18 1992-07-22 Nec Corporation Oversampling DA converter with operational amplifier driven by a single reference voltage
EP0503588A2 (en) * 1991-03-11 1992-09-16 Nippon Telegraph And Telephone Corporation Quadrature amplitude modulator with distortion compensation
EP0598585A2 (en) * 1992-11-16 1994-05-25 Linear Modulation Technology Ltd Automatic calibration of the quadrature balance within a cartesian amplifier
US5351016A (en) * 1993-05-28 1994-09-27 Ericsson Ge Mobile Communications Inc. Adaptively self-correcting modulation system and method

Also Published As

Publication number Publication date
ES2118050B1 (es) 1999-04-16

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