FR2886491A1 - Information transmission system for use by e.g. air balloon, has optical interface with conversion device converting radio frequency signals into optical signals transmitted by optical fibers, to reception assembly disposed in ground - Google Patents
Information transmission system for use by e.g. air balloon, has optical interface with conversion device converting radio frequency signals into optical signals transmitted by optical fibers, to reception assembly disposed in ground Download PDFInfo
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- FR2886491A1 FR2886491A1 FR0505491A FR0505491A FR2886491A1 FR 2886491 A1 FR2886491 A1 FR 2886491A1 FR 0505491 A FR0505491 A FR 0505491A FR 0505491 A FR0505491 A FR 0505491A FR 2886491 A1 FR2886491 A1 FR 2886491A1
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- Prior art keywords
- optical
- signals
- ground
- interface
- conversion device
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/18502—Airborne stations
- H04B7/18504—Aircraft used as relay or high altitude atmospheric platform
Abstract
Description
2886491 12886491 1
DISPOSITIF DE TRANSMISSION DE SIGNAUX CAPTES DEVICE FOR TRANSMITTING CAPTES SIGNALS
L'invention concerne un dispositif et un procédé permettant de transmettre des signaux captés ou émis vers un dispositif de traitement via un support optique. The invention relates to a device and a method for transmitting captured or transmitted signals to a processing device via an optical medium.
Elle s'applique notamment pour transmettre des informations 5 captées par un aéronef, tel qu'un ballon, vers un dispositif de traitement disposé au sol. It applies in particular to transmit information 5 captured by an aircraft, such as a balloon, to a treatment device disposed on the ground.
Le problème habituellement posé lorsque l'on souhaite traiter des signaux dans un système disposé à une certaine altitude du sol ou de la io surface de la mer, est de minimiser la charge emportée sur le support (ballon par exemple ou aéronef), afin d'optimiser les réserves en carburants, la taille du ballon ou les moyens de maintien en place du dispositif. The problem usually encountered when it is desired to process signals in a system disposed at a certain altitude of the ground or of the sea surface, is to minimize the load carried on the support (balloon for example or aircraft), in order to optimize the fuel reserves, the size of the balloon or the means for holding the device in place.
Les solutions classiques connues de l'art antérieur consistent, par exemple, à embarquer la totalité du récepteur de traitement des signaux sur un aéronef et à transférer au sol les signaux numérisés (par exemple des communications), soit en bande de base (I/Q), soit éventuellement en fréquence intermédiaire (FI). The conventional solutions known from the prior art consist, for example, in embedding the entire signal processing receiver on an aircraft and in transferring the digitized signals (for example communications) to the ground, either in baseband (I / Q), or possibly intermediate frequency (IF).
Lorsque l'on souhaite traiter simultanément un grand nombre de voies de communications (un grand nombre de signaux), le nombre de voies de réception est multipliée et de fait le poids du matériel de traitement embarqué sur l'aéronef devient trop important. When it is desired to simultaneously process a large number of communication paths (a large number of signals), the number of reception channels is multiplied and the weight of the processing equipment on board the aircraft becomes too great.
Les dispositifs connus de l'art antérieur, bien que performants ne résolvent toutefois pas le problème de diminution de la charge utile du ballon qui permettrait d'atteindre une plus grande altitude tout en garantissant une capacité de traitement suffisante du signal. However, the devices known from the prior art, although efficient, do not solve the problem of reducing the payload of the balloon which would allow to reach a higher altitude while ensuring a sufficient signal processing capacity.
Le procédé et le système selon l'invention reposent notamment sur l'idée suivante: après amplification et filtrage, le signal radiofréquence en sortie d'antennes module un laser au niveau de l'aérostat. Ce signal modulé 2886491 2 optiquement est transmis à l'aide de moyens optiques jusqu'au sol (ou en surface de l'eau) où après conversion en signaux RF, il est appliqué à des moyens classiques de démodulation et de traitement du signal. The method and the system according to the invention are based in particular on the following idea: after amplification and filtering, the radiofrequency signal at the output of antennas modulates a laser at the level of the aerostat. This optically modulated signal is transmitted by optical means to the ground (or surface of the water) where after conversion to RF signals, it is applied to conventional means of demodulation and signal processing.
L'invention concerne un système permettant de transmettre des informations d'un dispositif de réception vers un dispositif de traitement, l'un des dispositifs étant disposé au sol et l'autre en l'air, caractérisé en ce qu'il comporte au moins les éléments suivants: É un support optique permettant de transmettre l'information entre le 1 o dispositif de traitement et le dispositif de réception, É le dispositif de réception des informations comporte au moins: o une ou plusieurs antennes, o un équipement adapté à interfacer le signal RF issu des antennes avec le support optique, É le dispositif de traitement comporte au moins une interface avec le support optique et des moyens de traitement du signal. The invention relates to a system for transmitting information from a reception device to a processing device, one of the devices being disposed on the ground and the other in the air, characterized in that it comprises at least the following elements: an optical medium making it possible to transmit the information between the processing device and the receiving device; the information receiving device comprises at least: one or more antennas; equipment suitable for interfacing; the RF signal from the antennas with the optical medium, É the processing device comprises at least one interface with the optical medium and signal processing means.
L'invention présente notamment les avantages suivants; le dispositif permet, notamment dans un contexte de transmission d'informations à partir d'un aérostat captif, de déporter au sol l'ensemble des moyens de réception, à l'exception de l'antenne et des circuits d'amplification/filtrage et interface fibre optique qui constituent la charge utile du ballon. The invention has the following advantages in particular; the device makes it possible, in particular in a context of transmitting information from a captive aerostat, to off-set all of the reception means, with the exception of the antenna and the amplification / filter circuits, and fiber optic interface that make up the payload of the balloon.
D'autres caractéristiques et avantages de la présente invention apparaîtront mieux à la lecture de la description qui suit, d'un exemple de réalisation donné, annexée de la seule figure qui représente un schéma où un ballon équipé d'un ensemble d'antennes de réception et d'un convertisseur optique transmet des informations vers un système de traitement disposé au sol. Other features and advantages of the present invention will appear better on reading the description which follows, of a given embodiment, appended to the single figure which represents a diagram where a balloon equipped with a set of antennas of receiving and an optical converter transmits information to a treatment system disposed on the ground.
2886491 3 La figure unique représente un exemple de système selon l'invention comprenant un aérostat 1, par exemple un ballon, comprenant notamment, un réseau 1 de capteurs de signaux constitué de plusieurs antennes élémentaires et d'une matrice d'antennes 3. Le réseau est relié à un ensemble de mise en forme 4 comprenant des filtres et des amplificateurs. Les signaux issus de cet ensemble sont ensuite transmis à une interface optique 5 comprenant notamment un dispositif de conversion optique ayant pour fonction de convertir des signaux RF en signaux optiques. The single figure represents an example of a system according to the invention comprising an aerostat 1, for example a balloon, comprising in particular, a network 1 of signal sensors consisting of several elementary antennas and an array of antennas 3. network is connected to a shaping assembly 4 comprising filters and amplifiers. The signals from this set are then transmitted to an optical interface 5 comprising in particular an optical conversion device whose function is to convert RF signals into optical signals.
En sortie de l'interface optique 5, les signaux sont transmis au moyen de fibres optiques 6 par exemple vers un ensemble de réception 7 disposé au sol, désigné segment sol . At the output of the optical interface 5, the signals are transmitted by means of optical fibers 6 for example to a reception assembly 7 disposed on the ground, designated ground segment.
L'aérostat est maintenu au sol au moyen d'un câble non représenté sur la figure. Pour certaines applications, les fibres optiques peuvent aussi jouer un rôle de câble d'amarrage du ballon. The aerostat is held on the ground by means of a cable not shown in the figure. For some applications, the optical fibers can also play a role of cable mooring the balloon.
Les signaux reçus par le segment sol sont transmis à un dispositif de conversion optique -RF 8 qui les convertit, les signaux convertis étant ensuite transmis à des moyens de traitement 9 de ces signaux RF de façon à retrouver les signaux captés par les antennes. The signals received by the ground segment are transmitted to an optical conversion device-RF 8 which converts them, the converted signals then being transmitted to processing means 9 of these RF signals so as to recover the signals picked up by the antennas.
Le bloc d'antennes 1 est constitué par exemple d'une ou de 20 plusieurs antennes omnidirectionnelles ou directives adaptées à couvrir les bandes de fréquence que l'on souhaite observer. The antenna block 1 consists for example of one or more omnidirectional antennas or directives adapted to cover the frequency bands that it is desired to observe.
La matrice d'antennes 3 est un module ayant notamment pour fonction de sélectionner l'antenne ou l'ensemble d'antennes permettant de couvrir la bande de fréquence choisie. The antenna array 3 is a module whose particular function is to select the antenna or set of antennas to cover the selected frequency band.
L'ensemble de filtres et d'amplification est adapté notamment à mettre en forme le signal issu des antennes par: É Filtrage de la bande utile et réjection de signaux parasites É Amplification. The set of filters and amplification is adapted in particular to shape the signal from the antennas by: E Filtering of the useful band and rejection of spurious signals.
L'objectif est d'obtenir le meilleur facteur de bruit et une linéarité élevée. The goal is to get the best noise factor and high linearity.
L'interface optique 5, a notamment pour objectif de réaliser la modulation du laser par le signal RF et l'interface optique 8 la démodulation. The optical interface 5, in particular aims to achieve the modulation of the laser by the RF signal and the optical interface 8 demodulation.
2886491 4 Le segment sol 7 est constitué par exemple: É D'un module 8 interface fibre optique permettant de régénérer le signal RF, É D'un système d'interception et d'écoute 9, par exemple qui est 5 dimensionné notamment en fonction des besoins opérationnels. The ground segment 7 consists, for example: of an optical fiber interface module 8 for regenerating the RF signal, and an interception and listening system 9, for example which is dimensioned in particular according to operational requirements.
La fibre optique peut être une fibre large bande instantanée intégrée ou parallèle au câble retenant l'aérostat. La solution permet de couvrir tout le domaine spectral notamment de la HF (haute fréquence) aux fréquences millimétriques (1 KHz à 50 GHz). The optical fiber may be an instantaneous broadband fiber integrated or parallel to the cable holding the aerostat. The solution makes it possible to cover the entire spectral range, in particular from HF (high frequency) to millimeter frequencies (1 KHz to 50 GHz).
La fibre peut aussi être une fibre optique bande étroite. The fiber can also be a narrow band optical fiber.
Sans sortir du cadre de l'invention, il est possible de disposer la partie comprenant les capteurs et les moyens d'interface décrite précédemment sur l'aérostat au sol et la partie traitement de signal sur un aérostat. Without departing from the scope of the invention, it is possible to arrange the part comprising the sensors and the interface means described above on the aerostat on the ground and the signal processing part on an aerostat.
2886491 52886491 5
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0505491A FR2886491B1 (en) | 2005-05-31 | 2005-05-31 | DEVICE FOR TRANSMITTING CAPTES SIGNALS |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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FR0505491A FR2886491B1 (en) | 2005-05-31 | 2005-05-31 | DEVICE FOR TRANSMITTING CAPTES SIGNALS |
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FR2886491A1 true FR2886491A1 (en) | 2006-12-01 |
FR2886491B1 FR2886491B1 (en) | 2009-06-05 |
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FR0505491A Active FR2886491B1 (en) | 2005-05-31 | 2005-05-31 | DEVICE FOR TRANSMITTING CAPTES SIGNALS |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2486991A (en) * | 2010-07-30 | 2012-07-04 | Davidson Technology Ltd | Modulation of light by a radio signal, transmission along an optic fibre cable to a high altitude platform |
EP3035071A3 (en) * | 2014-11-30 | 2016-10-19 | Saab Medav Technologies GmbH | Signal transmission and holding device for air-borne antennas of an rf-locating system |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BRPI1100091A2 (en) * | 2011-01-14 | 2019-02-19 | Bruno Avena De Azevedo | Floating cells |
Citations (5)
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US5294930A (en) * | 1992-05-01 | 1994-03-15 | Li Ming Chiang | Optical RF stereo |
US5955989A (en) * | 1990-11-15 | 1999-09-21 | Li; Ming-Chiang | Optimum edges for speakers and musical instruments |
WO2002061971A1 (en) * | 2001-02-01 | 2002-08-08 | Skylinc Limited | Communication system using an aerostat tethered above the earth surface and linked to a base station by an optical fibre |
US20020167702A1 (en) * | 2000-01-10 | 2002-11-14 | Badesha Surjit S. | Optical communication system using a high altitude tethered ballon |
US20030222811A1 (en) * | 2002-06-03 | 2003-12-04 | Halsey J. Doss | Distributed elevated radar antenna system |
-
2005
- 2005-05-31 FR FR0505491A patent/FR2886491B1/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US5955989A (en) * | 1990-11-15 | 1999-09-21 | Li; Ming-Chiang | Optimum edges for speakers and musical instruments |
US5294930A (en) * | 1992-05-01 | 1994-03-15 | Li Ming Chiang | Optical RF stereo |
US20020167702A1 (en) * | 2000-01-10 | 2002-11-14 | Badesha Surjit S. | Optical communication system using a high altitude tethered ballon |
WO2002061971A1 (en) * | 2001-02-01 | 2002-08-08 | Skylinc Limited | Communication system using an aerostat tethered above the earth surface and linked to a base station by an optical fibre |
US20030222811A1 (en) * | 2002-06-03 | 2003-12-04 | Halsey J. Doss | Distributed elevated radar antenna system |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2486991A (en) * | 2010-07-30 | 2012-07-04 | Davidson Technology Ltd | Modulation of light by a radio signal, transmission along an optic fibre cable to a high altitude platform |
GB2486992A (en) * | 2010-07-30 | 2012-07-04 | Davidson Technology Ltd | High altitude information services platform, having at least two electrical power cables transporting power to the platform |
GB2486992B (en) * | 2010-07-30 | 2013-06-05 | Davidson Technology Ltd | High altitude platform |
GB2486991B (en) * | 2010-07-30 | 2013-06-05 | Davidson Technology Ltd | High altitude platform |
US9178241B2 (en) | 2010-07-30 | 2015-11-03 | Davidson Technology Limited | High altitude platform |
EP3035071A3 (en) * | 2014-11-30 | 2016-10-19 | Saab Medav Technologies GmbH | Signal transmission and holding device for air-borne antennas of an rf-locating system |
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FR2886491B1 (en) | 2009-06-05 |
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