EP1142137A1 - Emetteur de radiodiffusion en ondes courtes a haut rendement optimise pour les emissions de type numerique - Google Patents
Emetteur de radiodiffusion en ondes courtes a haut rendement optimise pour les emissions de type numeriqueInfo
- Publication number
- EP1142137A1 EP1142137A1 EP00900222A EP00900222A EP1142137A1 EP 1142137 A1 EP1142137 A1 EP 1142137A1 EP 00900222 A EP00900222 A EP 00900222A EP 00900222 A EP00900222 A EP 00900222A EP 1142137 A1 EP1142137 A1 EP 1142137A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- signal
- amplitude
- transmitted
- transmitter
- tube
- 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.)
- Withdrawn
Links
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 4
- 230000005284 excitation Effects 0.000 claims description 16
- 230000003321 amplification Effects 0.000 claims description 8
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 8
- 230000010287 polarization Effects 0.000 claims description 2
- 230000008901 benefit Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005236 sound signal Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000003071 parasitic effect Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
- H03F1/33—Modifications of amplifiers to reduce non-linear distortion in discharge-tube amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
- H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
- H03F1/3247—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits using feedback acting on predistortion circuits
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B2001/0408—Circuits with power amplifiers
Definitions
- the performance of the transmitters in terms of distortion, bandwidth and neutralization, means that the parasitic emissions in the channels close to that used by the the transmitter are too high.
- the amplitude channel presents cusps which, too, require a large bandwidth of the amplitude channel, typically at least equal to three times the bandwidth. of the signal sent.
- the major concern of the manufacturers of transmitters is the efficiency, to which are generally sacrificed the linearity and the phase distortion due to the approximate neutrodynage of the output tube.
- the overall output of the transmitter remains high since it works most of the time in the same way as in conventional solutions, namely as a switch. It is only when the power consumption is low that the efficiency also begins to decrease.
- the transmitter represented in FIG. 1 comprises a power tube 1 whose grid is excited by an excitation device 2 and whose anode is amplitude modulated by a modulator 3.
- a control device 4 generates the signals necessary for the phase control of the excitation device 2 and in amplitude of the modulator 3 from the real component l (t) and the imaginary component Q (t) of the complex signal to be transmitted.
- the signal S 1 (t) is then applied to a transmitting antenna 9 through a tuning and coupling device 10.
- the parasitic capacitances between the anode and the grid of the power tube introduce a complementary phase shift which is a function of the output amplitude of the power tube 1. It follows in the case of a transmission of a signal complex which comprises several regularly spaced amplitude and phase states, distortions of the type shown in FIG. 2.
- the emission device shown in FIG. 3 includes, like that shown in FIG. 1 where the homologous elements have the same references, a power tube 1 whose grid is excited by an excitation device 2 and whose anode is amplitude modulated by a modulator 3.
- the excitation device 2 and the modulator 3 are controlled by a control device 4.
- the emission device of FIG. 3 includes, like that shown in FIG. 1 where the homologous elements have the same references, a power tube 1 whose grid is excited by an excitation device 2 and whose anode is amplitude modulated by a modulator 3.
- the excitation device 2 and the modulator 3 are controlled by a control device 4.
- the emission device of FIG. 1 includes, like that shown in FIG. 1 where the homologous elements have the same references, a power tube 1 whose grid is excited by an excitation device 2 and whose anode is amplitude modulated by a modulator 3.
- the excitation device 2 and the modulator 3 are controlled by a control device 4.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Transmitters (AREA)
- Amplifiers (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Ceramic Products (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9900240A FR2788390B1 (fr) | 1999-01-12 | 1999-01-12 | Emetteur de radiodiffusion en ondes courtes a haut rendement optimise pour les emissions de type numerique |
FR9900240 | 1999-01-12 | ||
PCT/FR2000/000009 WO2000042710A1 (fr) | 1999-01-12 | 2000-01-05 | Emetteur de radiodiffusion en ondes courtes a haut rendement optimise pour les emissions de type numerique |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1142137A1 true EP1142137A1 (fr) | 2001-10-10 |
Family
ID=9540787
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00900222A Withdrawn EP1142137A1 (fr) | 1999-01-12 | 2000-01-05 | Emetteur de radiodiffusion en ondes courtes a haut rendement optimise pour les emissions de type numerique |
Country Status (7)
Country | Link |
---|---|
US (1) | US6993086B1 (fr) |
EP (1) | EP1142137A1 (fr) |
JP (1) | JP2002535868A (fr) |
CA (1) | CA2360335A1 (fr) |
FR (1) | FR2788390B1 (fr) |
HR (1) | HRP20010523A2 (fr) |
WO (1) | WO2000042710A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10035041B4 (de) * | 2000-07-19 | 2006-07-13 | Robert Bosch Gmbh | Verfahren zur Einstellung von Sendeparametern von einem Sender für digitale Rundfunksignale |
JP4533759B2 (ja) * | 2004-01-22 | 2010-09-01 | パナソニック株式会社 | データ変換器、およびデータ変換方法、ならびにそれらを用いた送信回路、通信機器、および電子機器 |
ES2520715T3 (es) * | 2006-10-13 | 2014-11-11 | Gentherm Incorporated | Cama con aire acondicionado |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3801732A (en) * | 1971-11-22 | 1974-04-02 | J Reeves | Method and apparatus for scrambled television |
FR2283592A1 (fr) | 1974-08-27 | 1976-03-26 | Thomson Csf | Dispositif extracteur de synchronisation et systeme de transmission d'informations comportant un tel dispositif |
FR2431229A1 (fr) | 1978-07-12 | 1980-02-08 | Thomson Csf | Dispositif de demodulation de signaux modules en deplacement de frequence et systeme de transmission comportant un tel dispositif |
FR2546001B1 (fr) | 1983-05-10 | 1985-07-05 | Thomson Csf | Demodulateur de signaux, a enveloppe constante et phase continue, modules angulairement par un train de symboles binaires |
CH667762A5 (de) * | 1985-02-14 | 1988-10-31 | Bbc Brown Boveri & Cie | Einseitenbandmodulationsverfahren, einseitenbandmodulator und rundfunksender. |
FR2604318B1 (fr) | 1986-09-23 | 1989-03-31 | Thomson Csf | Procede et dispositif de synchronisation symbole et leur application a la demodulation symbole de messages numeriques |
FR2605769B1 (fr) | 1986-10-22 | 1988-12-09 | Thomson Csf | Operateur polynomial dans les corps de galois et processeur de traitement de signal numerique comportant un tel operateur |
FR2605818B1 (fr) | 1986-10-27 | 1992-09-18 | Thomson Csf | Codeur-decodeur algebrique de codes en blocs reed solomon et bch, applicable aux telecommunications numeriques |
FR2607987B1 (fr) | 1986-12-05 | 1989-02-10 | Thomson Csf | Procede et dispositif de modulation et de demodulation a plusieurs etats, a niveau de protection ajustable |
FR2631147B1 (fr) | 1988-05-04 | 1991-02-08 | Thomson Csf | Procede et dispositif de detection de signaux vocaux |
FR2631146B1 (fr) | 1988-05-04 | 1991-05-10 | Thomson Csf | Procede et dispositif de codage de l'energie du signal vocal dans des vocodeurs a tres faibles debits |
FR2635420B1 (fr) | 1988-07-19 | 1990-10-19 | Thomson Csf | Procede et dispositif de demodulation de signaux a enveloppe constante et phase continue modules angulairement par un train de symboles binaires, tolerant les derives de frequence |
CH675802A5 (fr) * | 1988-09-15 | 1990-10-31 | Asea Brown Boveri | |
FR2639306B1 (fr) * | 1988-11-18 | 1990-12-21 | Alsthom Gec | Systeme de transmission d'information d'initialisation, entre des installations fixes et des trains |
US5285208A (en) * | 1989-09-05 | 1994-02-08 | Motorola, Inc. | Power management system for a worldwide multiple satellite communications system |
FR2654542B1 (fr) | 1989-11-14 | 1992-01-17 | Thomson Csf | Procede et dispositif de codage de filtres predicteurs de vocodeurs tres bas debit. |
JPH0466826U (fr) * | 1990-10-16 | 1992-06-12 | ||
FR2670313A1 (fr) | 1990-12-11 | 1992-06-12 | Thomson Csf | Procede et dispositif pour l'evaluation de la periodicite et du voisement du signal de parole dans les vocodeurs a tres bas debit. |
FR2690551B1 (fr) | 1991-10-15 | 1994-06-03 | Thomson Csf | Procede de quantification d'un filtre predicteur pour vocodeur a tres faible debit. |
DE4210069A1 (de) * | 1992-03-27 | 1993-09-30 | Asea Brown Boveri | Amplitudenmodulierter Rundfunksender für verschiedene Modulationsarten, insbesondere DSB, SSB und ISB |
FR2738383B1 (fr) | 1995-09-05 | 1997-10-03 | Thomson Csf | Procede de quantification vectorielle de vocodeurs bas debit |
US5903188A (en) * | 1998-02-17 | 1999-05-11 | Harris Corporation | Modulator having improved discharging unwanted capacitance |
-
1999
- 1999-01-12 FR FR9900240A patent/FR2788390B1/fr not_active Expired - Fee Related
-
2000
- 2000-01-05 WO PCT/FR2000/000009 patent/WO2000042710A1/fr not_active Application Discontinuation
- 2000-01-05 EP EP00900222A patent/EP1142137A1/fr not_active Withdrawn
- 2000-01-05 US US09/868,918 patent/US6993086B1/en not_active Expired - Fee Related
- 2000-01-05 JP JP2000594201A patent/JP2002535868A/ja active Pending
- 2000-01-05 CA CA002360335A patent/CA2360335A1/fr not_active Abandoned
-
2001
- 2001-07-12 HR HR20010523A patent/HRP20010523A2/hr not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO0042710A1 * |
Also Published As
Publication number | Publication date |
---|---|
CA2360335A1 (fr) | 2000-07-20 |
WO2000042710A1 (fr) | 2000-07-20 |
FR2788390B1 (fr) | 2003-05-30 |
HRP20010523A2 (en) | 2002-12-31 |
US6993086B1 (en) | 2006-01-31 |
JP2002535868A (ja) | 2002-10-22 |
FR2788390A1 (fr) | 2000-07-13 |
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Legal Events
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RTI1 | Title (correction) |
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STAA | Information on the status of an ep patent application or granted ep patent |
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