ES2081332T3 - Sistema para generar criterios de conmutacion y para ecualizar adaptativamente en un espectro de datos. - Google Patents
Sistema para generar criterios de conmutacion y para ecualizar adaptativamente en un espectro de datos.Info
- Publication number
- ES2081332T3 ES2081332T3 ES90119037T ES90119037T ES2081332T3 ES 2081332 T3 ES2081332 T3 ES 2081332T3 ES 90119037 T ES90119037 T ES 90119037T ES 90119037 T ES90119037 T ES 90119037T ES 2081332 T3 ES2081332 T3 ES 2081332T3
- Authority
- ES
- Spain
- Prior art keywords
- signature
- distortion
- data spectrum
- fading
- criteria
- 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
Links
- 238000001228 spectrum Methods 0.000 title abstract 3
- 238000005562 fading Methods 0.000 abstract 3
- 230000004913 activation Effects 0.000 abstract 1
- 230000003044 adaptive effect Effects 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 abstract 1
- 239000006185 dispersion Substances 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/005—Control of transmission; Equalising
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
- H04B17/327—Received signal code power [RSCP]
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Filters That Use Time-Delay Elements (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
Abstract
EL SISTEMA DE LA INVENCION DETECTA LA DISTORSION DE ESPECTRO DE DATOS EN LA TRANSMISION, EN PARTICULAR LA DISTORSION CAUSADA POR EL DESVANECIMIENTO SELECTIVO. SE BASA EN LA IDENTIFICACION DE LA DISPERSION DE LAS BANDAS, POR EJEMPLO, UNA DISTORSION DE AMPLITUD, Y CON ESTE OBJETO INCLUYE PRINCIPALMENTE: DOS BLOQUES EN PARALELO, CUYO COMPORTAMIENTO DE MODULO TIENE PENDIENTES IGUALES PERO DIFERENTES SEÑALES SOBRE UN CAMBIO DE FRECUENCIAS; DOS DETECTORES DE CORRIENTE MEDIA, CADA UNO DE ELLOS ASOCIADO A UNO DE DICHOS BLOQUES; Y SOLO UN MEDIO DE COMPARACION DE CORRIENTE MEDIA DETECTADO. ESTE SISTEMA PERMITE DETECTAR LAS ASIMETRIAS DEL ESPECTRO DE DATOS Y AÑADIENDO UN AGC Y UN VOLTAJE DE REFERENCIA, TAMBIEN SE OBTIENE LA INFORMACION RELACIONADA CON LA MUESCA CENTRAL. LA MEDICION DE LA DISTORSION OBTENIDA DE ESTE MODO PERMITE GENERAR UN CRITERIO O CONTROL DE CONEXION, COMO CONTRAMEDIDA PARA LOS DESVANECIMIENTOS SELECTIVOS. EL CRITERIO SE OBTIENE EN LA FRECUENCIA INTERMEDIA Y GENERA UNA ALARMA SIEMPRE QUE LAS DISTORSIONES CAUSADAS POR DESVANECIMIENTOS TIENDEN A UNA CONDICION DE ERROR PARA EL TIPO DE MODULADOR-DEMODULADOR QUE SE UTILIZA. CON REFERENCIA A LA "FIRMA" DIBUJADA PARA UN BER IGUAL A 10 ELEVADO A -6 SE DIBUJA UNA CURVA (FIRMA IF) QUE REPRESENTA LA ACTIVACION DE UNA ALARMA SIEMPRE QUE LOS PARAMETROS DE DESVANECIMIENTO EXCEDAN LOS PARAMETROS PREFIJADOS. LA FIRMA IF ESTA MUCHO MAS EXTENDIDA EN FRECUENCIA QUE LA FIRMA BER = 10 ELEVADO A -6. SE LLEVA A CABO LA ECUALIZACION ADAPTIVA EN UNA FRECUENCIA INTERMEDIA SOLAMENTE EN AMPLITUD, SIN ALTERAR LAS DISTORSIONES DE RETRASO DE GRUPO.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT02215989A IT1237648B (it) | 1989-10-27 | 1989-10-27 | Sistema e circuito di rivelazione delle dissimmetrie dello spettro dati in trasmissione in particolare di quelle dovute a fading seletti-vo |
| IT02216089A IT1237649B (it) | 1989-10-27 | 1989-10-27 | Sistema e dispositivi per l'equalizzazione adattativa dello spettro dati |
| IT02223189A IT1237669B (it) | 1989-10-31 | 1989-10-31 | Sistema e circuito per la generazione di un criterio di scambio come contromisura ai fading selettivi. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES2081332T3 true ES2081332T3 (es) | 1996-03-01 |
Family
ID=27273255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES90119037T Expired - Lifetime ES2081332T3 (es) | 1989-10-27 | 1990-10-04 | Sistema para generar criterios de conmutacion y para ecualizar adaptativamente en un espectro de datos. |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5285473A (es) |
| EP (1) | EP0427951B1 (es) |
| JP (1) | JP3216094B2 (es) |
| DE (1) | DE69024613T2 (es) |
| ES (1) | ES2081332T3 (es) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6954702B2 (en) * | 2003-02-21 | 2005-10-11 | Ric Investments, Inc. | Gas monitoring system and sidestream gas measurement system adapted to communicate with a mainstream gas measurement system |
| US7242725B2 (en) * | 2003-04-02 | 2007-07-10 | Harris Stratex Networks Operating Corporation | Adaptive broadband post-distortion receiver for digital radio communication system |
| US20080084345A1 (en) * | 2006-07-19 | 2008-04-10 | Sensis Corporation | Broadband multi-channel detector with signal and jamming discrimination |
| US8634766B2 (en) | 2010-02-16 | 2014-01-21 | Andrew Llc | Gain measurement and monitoring for wireless communication systems |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE7512401L (sv) * | 1974-11-07 | 1976-05-10 | Decca Ltd | Dempsats for antenner |
| US4054842A (en) * | 1977-01-19 | 1977-10-18 | Rockwell International Corporation | Channel gain imbalance compensation for FSK demodulator |
| US4200840A (en) * | 1978-10-06 | 1980-04-29 | The United States Of America As Represented By The Secretary Of The Air Force | Dual detection scheme for compressive receivers |
| JPS5827475A (ja) * | 1981-08-11 | 1983-02-18 | Hitachi Ltd | ゴ−スト除去装置 |
| WO1985005518A1 (en) * | 1984-05-15 | 1985-12-05 | Australian Telecommunications Commission | Characterisation of digital radio signals |
| US4568882A (en) * | 1984-10-01 | 1986-02-04 | National Semiconductor Corporation | Digital FSK demodulator circuit |
| CA1275710C (en) * | 1986-08-18 | 1990-10-30 | Toshiaki Suzuki | Amplitude equalizer |
| US5065410A (en) * | 1987-12-15 | 1991-11-12 | Nec Corporation | Method and arrangement for setting an amplitude equalization characteristic on an equalizer for use in a modem |
-
1990
- 1990-10-04 DE DE69024613T patent/DE69024613T2/de not_active Expired - Fee Related
- 1990-10-04 ES ES90119037T patent/ES2081332T3/es not_active Expired - Lifetime
- 1990-10-04 EP EP90119037A patent/EP0427951B1/en not_active Expired - Lifetime
- 1990-10-26 US US07/604,791 patent/US5285473A/en not_active Expired - Lifetime
- 1990-10-29 JP JP28861390A patent/JP3216094B2/ja not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0427951B1 (en) | 1996-01-03 |
| EP0427951A3 (en) | 1992-09-02 |
| US5285473A (en) | 1994-02-08 |
| DE69024613T2 (de) | 1996-08-01 |
| EP0427951A2 (en) | 1991-05-22 |
| DE69024613D1 (de) | 1996-02-15 |
| JPH03187611A (ja) | 1991-08-15 |
| JP3216094B2 (ja) | 2001-10-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FG2A | Definitive protection |
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