ES2118050A1 - Modulador autoajustable y metodo de modulacion autoajustable - Google Patents
Modulador autoajustable y metodo de modulacion autoajustableInfo
- 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
Links
Landscapes
- 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.
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)
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 |
-
1994
- 1994-06-06 ES ES09650006A patent/ES2118050B1/es not_active Expired - Lifetime
Patent Citations (7)
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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