WO2008023103A1 - Dispositif d'acquisition multi-voies pour transmetteurs radio - Google Patents
Dispositif d'acquisition multi-voies pour transmetteurs radio Download PDFInfo
- Publication number
- WO2008023103A1 WO2008023103A1 PCT/FR2007/001337 FR2007001337W WO2008023103A1 WO 2008023103 A1 WO2008023103 A1 WO 2008023103A1 FR 2007001337 W FR2007001337 W FR 2007001337W WO 2008023103 A1 WO2008023103 A1 WO 2008023103A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- antenna
- pair
- receiver
- antennas
- information transmitted
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
-
- 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
- H04B1/06—Receivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
Definitions
- the present invention generally relates to a fixed reception system for a fixed network radio transmission system of information transmitted over a single wavelength ⁇ by a plurality of transmitters generally associated with measurement sensors. the transmitters being dispersed over a geographical area, to the receiving system for collecting all the information transmitted in said geographical area.
- the information is transmitted over the air from the sensors relayed by transmitters to the reception systems, which are themselves directly connected to the company's wide area network (WAN).
- WAN wide area network
- Reflections and re-transmissions of signals result in the appearance of a stationary wave distribution in three dimensions.
- the signal level at any point in the space is determined by the sum in amplitude and phase of the direct signal and signals reflected or reemitted by the obstacles encountered. It happens as well as in certain points of space, the signal will be very weakened (the different waves canceling each other out), what we call in the world of the radio a "null-spot" or blind zone.
- the invention aims, above all, to provide an effective solution while being relatively economical, the problem of blind areas or "null spots”.
- a fixed reception system for a fixed network wireless transmission system of information transmitted over a single wavelength ⁇ by a plurality of transmitters generally associated with measurement sensors, the transmitters being dispersed over a geographical area, destined for the reception system for collecting all the information transmitted in said geographical area is characterized in that it comprises at least two antenna-receiver pairs, each receiver of said pair being associated with the single antenna of the same pair, the output of each receiver being connected to a single data acquisition automaton, the antenna of a pair being placed at a distance of at least ⁇ / 4 of the antenna of the other pair in order to guard against the effects of the "null spots" resulting from the mutual cancellation of waves coming from the same transmitter but having followed different propagation paths rents, and having undergone different or even opposite transformations in terms of amplitude and phase.
- the antennas of the various pairs are installed on the far edges of the same building roof.
- the frequency associated with the wavelength ⁇ of the system is chosen from free frequencies or dedicated frequencies. More preferably, said frequency is between 100 MHz and 900 MHz inclusive.
- system according to the invention also comprises other antennas and other receivers, directly coupled to each other or not.
- said acquisition automaton is associated with a communication card for sending the collected information to a communication network.
- the data collected comes from any type of measurement sensor.
- said sensors are sensors for volume, temperature, pressure, speed and / or position.
- the system according to the invention is used for remote reading of water meters, or for the management of a fleet of dumpsters, each bucket being equipped with a sensor-transmitter.
- the single figure of the drawing represents a diagram of the reception system according to the invention.
- the object of the present invention is thus to equip a fixed reception system A for a fixed network wireless transmission system of information transmitted over a single wavelength ⁇ by a plurality of transmitters (not shown). associated with measurement sensors.
- the transmitters are dispersed over a geographical area, and each sends the collected information to the reception system A for the collection of all the information transmitted in the said geographical area.
- the information is usually issued in digital form.
- the reception system A comprises at least two pairs I, II antenna 1 - receiver 2. Antenna 1 and receiver 2 of a pair I or II are interconnected by a coaxial cable 3.
- the system A comprises two pairs I and II antenna 1 - receiver 2.
- Each receiver 2 of a pair I or II is associated only with the single antenna 2 of the same pair I or II.
- the two antennas 1 of the two pairs I and II must be spaced from each other by an appropriate distance of more than a quarter of the wavelength to not to disturb each other, for example by coupling, and not to be located in the same "null spot".
- the use of more than two antennas may be considered, even if the improvement to be expected will be less clear.
- This configuration makes it possible in particular to guard against the effects of "null spots” resulting from the mutual cancellation of waves coming from the same transmitter but having followed different propagation paths, and having undergone different or even opposite transformations in terms of amplitude and phase
- the system A also comprises another pair III antenna 1'-receiver 2 ', but it is not intended to intervene in the cancellation of the effect "null-spot" .
- It may for example consist of a directional antenna for specifically collecting the information of a particular geographical area in the general geographic area of coverage of the receiving system.
- the antenna 1 'and the receiver 2' are also directly associated with each other by a coaxial cable 3.
- the antenna 1 of the pair II is associated only with the only receiver 2 'of the same pair.
- the system A according to the invention may also include other antennas and other receivers directly coupled together or not as required. These other antennas and these other receivers will not intervene in canceling the "null-spot" effect.
- the antennas of the various couples I, II or III can be installed on the edges of a single building roof.
- each receiver 2 is connected to a single automation 4 acquisition of information provided to organize and process the information received.
- the acquisition automaton 4 will indifferently receive the decoded messages from one or the other of the receivers 3, and will, if necessary, ensure the deduplication of the data so as not to unnecessarily conserve the redundant data. This processing may also be performed by a central information system receiving the data collected and transmitted to it by the acquisition automaton 4.
- the receivers 3 are connected to the acquisition automaton 4 by serial links 5.
- the acquisition automaton 4 can indifferently be powered directly from the sector 6 or by one or more batteries (s) 7 depending on the availability of the site of implantation of the receiving system of the invention.
- the acquisition automaton 4 is connected to a communication card 8 which will make the connection between the reception system of the invention and the communication network of the company which has implanted it (represented by the arrow B ).
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mobile Radio Communication Systems (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Radio Relay Systems (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MX2009001251A MX2009001251A (es) | 2006-08-04 | 2007-08-02 | Dispositivo de adquisicion de multiples canales para radio transmisores. |
CA002659760A CA2659760A1 (fr) | 2006-08-04 | 2007-08-02 | Dispositif d'acquisition multi-voies pour transmetteurs radio |
BRPI0714694-9A BRPI0714694A2 (pt) | 2006-08-04 | 2007-08-02 | sistema de recepÇço fixo para sistema de transmissço por via hertziana |
AU2007287463A AU2007287463A1 (en) | 2006-08-04 | 2007-08-02 | Multi-channel acquisition device for radio transmitters |
JP2009522306A JP2009545903A (ja) | 2006-08-04 | 2007-08-02 | 無線送信機のための多重通信路取得装置 |
EP07823390A EP2050188A1 (fr) | 2006-08-04 | 2007-08-02 | Dispositif d'acquisition multi-voies pour transmetteurs radio |
TN2009000037A TN2009000037A1 (fr) | 2006-08-04 | 2009-02-03 | Dispositif d'acquisition multi-voies pour transmetteurs radio |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0607160A FR2904740B1 (fr) | 2006-08-04 | 2006-08-04 | Dispositif d'acquisition multi-voies pour transmetteurs radio. |
FR0607160 | 2006-08-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008023103A1 true WO2008023103A1 (fr) | 2008-02-28 |
Family
ID=37814074
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2007/001337 WO2008023103A1 (fr) | 2006-08-04 | 2007-08-02 | Dispositif d'acquisition multi-voies pour transmetteurs radio |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP2050188A1 (fr) |
JP (1) | JP2009545903A (fr) |
KR (1) | KR20090035609A (fr) |
AU (1) | AU2007287463A1 (fr) |
CA (1) | CA2659760A1 (fr) |
FR (1) | FR2904740B1 (fr) |
MX (1) | MX2009001251A (fr) |
TN (1) | TN2009000037A1 (fr) |
WO (1) | WO2008023103A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102035608A (zh) * | 2010-12-13 | 2011-04-27 | 北京航空航天大学 | 一种分析接收点附近群路径空间差异性的方法 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011193298A (ja) * | 2010-03-15 | 2011-09-29 | Omron Corp | タグ通信装置、タグ通信装置の電波送信方法、およびタグ通信装置の電波送信プログラム |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4965732A (en) * | 1985-11-06 | 1990-10-23 | The Board Of Trustees Of The Leland Stanford Junior University | Methods and arrangements for signal reception and parameter estimation |
US5203018A (en) * | 1989-07-06 | 1993-04-13 | Oki Electric Industry Co., Ltd. | Space diversity system switching transmission |
FR2695276A1 (fr) * | 1992-09-01 | 1994-03-04 | Matra Communication | Procédé et installation de radiocommunication à discrimination de communications reçues sur un même canal et provenant de stations ayant des emplacements différents. |
EP1037397A1 (fr) * | 1999-03-18 | 2000-09-20 | ARNOULD Fabrique d'Appareillage Electrique | Dispositif de transmission radio multifréquences |
EP1475904A2 (fr) * | 2003-05-06 | 2004-11-10 | AMI Semiconductor, Inc. | Une architecture de récepteur adaptatif avec diversité |
-
2006
- 2006-08-04 FR FR0607160A patent/FR2904740B1/fr active Active
-
2007
- 2007-08-02 KR KR1020097003986A patent/KR20090035609A/ko not_active Application Discontinuation
- 2007-08-02 AU AU2007287463A patent/AU2007287463A1/en not_active Abandoned
- 2007-08-02 MX MX2009001251A patent/MX2009001251A/es not_active Application Discontinuation
- 2007-08-02 CA CA002659760A patent/CA2659760A1/fr not_active Abandoned
- 2007-08-02 WO PCT/FR2007/001337 patent/WO2008023103A1/fr active Application Filing
- 2007-08-02 EP EP07823390A patent/EP2050188A1/fr not_active Withdrawn
- 2007-08-02 JP JP2009522306A patent/JP2009545903A/ja active Pending
-
2009
- 2009-02-03 TN TN2009000037A patent/TN2009000037A1/fr unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4965732A (en) * | 1985-11-06 | 1990-10-23 | The Board Of Trustees Of The Leland Stanford Junior University | Methods and arrangements for signal reception and parameter estimation |
US5203018A (en) * | 1989-07-06 | 1993-04-13 | Oki Electric Industry Co., Ltd. | Space diversity system switching transmission |
FR2695276A1 (fr) * | 1992-09-01 | 1994-03-04 | Matra Communication | Procédé et installation de radiocommunication à discrimination de communications reçues sur un même canal et provenant de stations ayant des emplacements différents. |
EP1037397A1 (fr) * | 1999-03-18 | 2000-09-20 | ARNOULD Fabrique d'Appareillage Electrique | Dispositif de transmission radio multifréquences |
EP1475904A2 (fr) * | 2003-05-06 | 2004-11-10 | AMI Semiconductor, Inc. | Une architecture de récepteur adaptatif avec diversité |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102035608A (zh) * | 2010-12-13 | 2011-04-27 | 北京航空航天大学 | 一种分析接收点附近群路径空间差异性的方法 |
CN102035608B (zh) * | 2010-12-13 | 2014-02-12 | 北京航空航天大学 | 一种分析接收点附近群路径空间差异性的方法 |
Also Published As
Publication number | Publication date |
---|---|
MX2009001251A (es) | 2009-04-07 |
CA2659760A1 (fr) | 2008-02-28 |
JP2009545903A (ja) | 2009-12-24 |
FR2904740B1 (fr) | 2010-05-21 |
EP2050188A1 (fr) | 2009-04-22 |
TN2009000037A1 (fr) | 2010-08-19 |
AU2007287463A1 (en) | 2008-02-28 |
FR2904740A1 (fr) | 2008-02-08 |
KR20090035609A (ko) | 2009-04-09 |
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