EP0852076A1 - Antenne pour station centrale d'un systeme de radiodiffusion par faisceau hertzien point a multipoint - Google Patents

Antenne pour station centrale d'un systeme de radiodiffusion par faisceau hertzien point a multipoint

Info

Publication number
EP0852076A1
EP0852076A1 EP96920731A EP96920731A EP0852076A1 EP 0852076 A1 EP0852076 A1 EP 0852076A1 EP 96920731 A EP96920731 A EP 96920731A EP 96920731 A EP96920731 A EP 96920731A EP 0852076 A1 EP0852076 A1 EP 0852076A1
Authority
EP
European Patent Office
Prior art keywords
antenna
subscriber stations
antenna according
characteristic
sectors
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Withdrawn
Application number
EP96920731A
Other languages
German (de)
English (en)
Inventor
Hans-Peter Petry
Heinz GÖCKLER
Harald Ansorge
Erich Auer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telent GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0852076A1 publication Critical patent/EP0852076A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • 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
    • H04B7/155—Ground-based stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures

Definitions

  • the invention relates to an antenna of a central station of a point-to-multipoint directional radio system which communicates with several surrounding subscriber stations equipped with directional antennas, which antenna generates a sectored characteristic.
  • a point-to-multipoint radio relay system is described in DE 3420917A1.
  • the central station has an antenna which has either an omnidirectional or a sector characteristic.
  • a single antenna (dipole) can be used to generate an omnidirectional characteristic that covers the entire area surrounding the central station.
  • the area surrounding the central station be divided into individual sectors, with a separate antenna being responsible for illuminating each sector.
  • These known antenna arrangements require high transmission power from both the central station and the subscriber stations.
  • the invention is therefore based on the object of specifying an antenna of the type mentioned at the outset which requires the lowest possible transmission power both on the part of the central station and on the part of the subscriber stations and which ensures the highest possible transmission quality.
  • the antenna characteristic of the central station is divided into sectors that are strictly limited to the surrounding subscriber stations, both the central stations and the subscriber stations manage with a relatively low transmission power and there is a high transmission quality in both transmission directions between the fixed station and the
  • Subscriber stations guaranteed. Due to the concentration of the transmission characteristics of the central station, interference from other radio systems not belonging to the point-to-multipoint radio relay system is kept low. It also improves electromagnetic environmental compatibility (EMUV). By concentrating the reception characteristics of the central station on the existing subscriber stations, these require only a relatively low transmission power to ensure a good transmission quality from the subscriber stations to the base station. Interference with the point-to-multipoint radio relay system by other radio systems is thus largely excluded. A particularly strong concentration of the antenna characteristics of the central station on the subscriber stations is achieved in that the antenna of the central station forms transmitting and / or receiving lobes in the sectors occupied by one or more subscriber stations.
  • EMUV electromagnetic environmental compatibility
  • locally separated sectors or lobes are operated in the same channel, ie on the same frequency or in the same time slot or in the same code. It is also advantageous if the antenna of the central station only aligns a transmitting or receiving lobe to a subscriber station when a communication connection is to be established between the two, and the directional characteristic is reduced again after the connection has ended. In this case, it is expedient to provide a signaling channel between all subscriber stations and the central station, which contains information about which
  • Subscriber stations radio links are to be established or dismantled.
  • Such a signaling channel could be transmitted via an omnidirectional characteristic.
  • FIG. 1 shows a schematic illustration of a point-to-multipoint directional radio system
  • FIG. 2 shows the basic circuit diagram of a beam shaping network for the antenna of the central station.
  • TS1 ... TS6 six subscriber stations TS1 ... TS6, for example, are arranged around a central station ZS. The distances between the individual subscriber stations TS1 ... TS6 are very different.
  • An antenna present in the central station ZS forms a sectored characteristic which is preferably used both for sending messages to the subscriber stations TS1 ... TS6 and for receiving messages which the subscriber stations TS1 ... TS6 send to the central station ZS, is exploited.
  • the individual sectors S1 ... S4, which are indicated by hatching in FIG. 1, are narrowly limited to the areas in which the subscriber stations TS1 ... TS6 are located.
  • the sectors S1 ... S6 of the antenna characteristic are limited as closely as possible to the areas in which one or more subscriber stations TS1 ... TS6 are located. Sectoral areas in which there are no subscriber stations are left out of the antenna characteristics.
  • the power emitted by the antenna is therefore concentrated as closely as possible on the existing subscriber stations TS1 ... TS6. This saves transmission power and almost no interference radiation is generated for other radio systems. If several subscriber stations TS3, TS4 or TS5, TS6 are very close to one another, it is expedient to assign them to a sector S3 or S4 of the antenna characteristic.
  • Crosstalk between adjacent sectors and the antenna characteristic can be reduced by polarizing their fields orthogonally to one another.
  • the best transmission quality (sending and receiving) between the central station ZS and the individual Subscriber stations TS1 ... TS6 is achieved in that the sectors of the antenna characteristic have the shape of a lobe K1, K2, K4 or several lobes K3, K34.
  • FIG. 1 shows, there are now several variants for assigning the clubs to the individual subscriber stations. So one can
  • Sector SI or S2 consist of a club Kl or K2, which is aimed at a single subscriber station TSI or TS2.
  • the antenna forms two lobes K33 and K34 in a sector S3, one lobe K33, K34 being aligned with a subscriber station TS3, TS4.
  • the antenna generates a damping pole for the lobe aligned with the subscriber station TS3 at the subscriber station TS4 and vice versa.
  • Two or more subscriber stations TS5, TS6 can also be detected by a lobe K4 in a sector S4.
  • the antenna of the central station ZS only establishes a connection to a subscriber station when a
  • the information about the subscriber stations for which connections are to be set up or cleared can be exchanged between the subscriber stations and the central station via a signaling channel.
  • a signaling channel it is expedient if an antenna provided for this purpose of the central station generates an omnidirectional characteristic which covers all subscriber stations TS1 ... TS6 simultaneously. Messages that are spatially separated from one another can transmit messages in the same physical channel, ie on the same frequency or in the same time slot or in the same code.
  • the use of an adaptive array antenna is advantageous for generating the previously described lobe-shaped characteristic. As can be seen in FIG. 2, such an array antenna consists of a multiplicity of antenna elements AI, ... Ai, ..., AI. These antenna elements AI ... AI are arranged so that they are controlled with appropriate control
  • Beam forming networks BF1, ..., Bf1 ..., BFL generate any desired radiation lobe with regard to direction and aperture angle.
  • a beam shaping network BF1, ..., Bfl, ...., Bfl, ...., BL is available for each of the L existing message channels NK1, ..., Nkl ..., NKL.
  • the two arrow directions drawn in the circuit of FIG. 2 indicate that both transmitting lobes and receiving lobes can be generated with the circuit.
  • a multiplexer is connected between each individual antenna element AI ... AI and the beamforming networks BF1 ... BFL, and a demultiplexer in the case of reception.
  • multiplexers and demultiplexers are designated with the common reference symbols DMXl, ..., DMXi, ...., DMXl.
  • a message channel NKL is to be transmitted with a specific lobe in terms of direction and opening angle1
  • this channel MKL is split in the beam forming network BFL into as many individual signals as there are antenna elements AI ... AI for the generation of the associated transmitting lobe.
  • Each of these individual signals is assigned a weighting factor W.1L, ..., w . iL, ..., w.IL multiplied.
  • These weighting factors are stored as vectors in a separate memory and are dimensioned such that the weighted with them, the individual Antenna elements AI ...
  • the multiplexers DMXl ... DMXl upstream of the antenna elements AI ... AI combine the weighted signals of all message channels NK1 ... NKL intended for the respective antenna element AI ... AI.
  • the type of multiplexer DMXl ... DMXl depends on whether the directional radio system is operated in frequency division multiplexing (FDMA), time division multiplexing (TDMA) or code multiplexing (CDMA). In the case of reception, the partial signals received by the individual antenna elements AI ... AI are combined in the opposite direction, weighted accordingly, and the received message channels NK1 ... NKL are derived therefrom.
  • FDMA frequency division multiplexing
  • TDMA time division multiplexing
  • CDMA code multiplexing
  • the sector and lobe classification can be the same for the send and for the receive direction. However, they can also be different for both directions, depending on what has a more favorable effect on the signal transmission quality.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

Pour que l'antenne d'une station centrale d'un système de radiodiffusion par faisceau hertzien point à multipoint puisse fonctionner avec la puissance d'émission la plus faible possible tout en garantissant une qualité de transmission élevée, elle génère une caractéristique regroupant plusieurs secteurs (S1 à S4) dont la direction et l'angle d'ouverture sont conçus de telle façon que chaque secteur (S1 à S4) soit délimité en correspondant le plus possible à la zone occupée par au moins une station d'abonnés (TS1 à TS6).
EP96920731A 1995-09-23 1996-06-29 Antenne pour station centrale d'un systeme de radiodiffusion par faisceau hertzien point a multipoint Withdrawn EP0852076A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19535441 1995-09-23
DE19535441A DE19535441A1 (de) 1995-09-23 1995-09-23 Antenne einer Zentralstation eines Punkt-zu-Mehrpunkt-Richtfunksystems
PCT/DE1996/001160 WO1997011508A1 (fr) 1995-09-23 1996-06-29 Antenne pour station centrale d'un systeme de radiodiffusion par faisceau hertzien point a multipoint

Publications (1)

Publication Number Publication Date
EP0852076A1 true EP0852076A1 (fr) 1998-07-08

Family

ID=7773006

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96920731A Withdrawn EP0852076A1 (fr) 1995-09-23 1996-06-29 Antenne pour station centrale d'un systeme de radiodiffusion par faisceau hertzien point a multipoint

Country Status (6)

Country Link
US (1) US6151513A (fr)
EP (1) EP0852076A1 (fr)
KR (1) KR19990044103A (fr)
BR (1) BR9610594A (fr)
DE (1) DE19535441A1 (fr)
WO (1) WO1997011508A1 (fr)

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ES2200348T3 (es) * 1997-03-25 2004-03-01 Siemens Aktiengesellschaft Procedimiento para la estimacion de canal a partir de señales de recepcion transmitidas a traves de un canal de radio.
EP0915628B1 (fr) * 1997-11-07 2008-05-14 Lucent Technologies Inc. Système de communication cellulaire sans fil comportant des postes fixes
DE19806914C2 (de) * 1998-02-19 2002-01-31 Bosch Gmbh Robert Verfahren und Vorrichtung zum Kalibrieren einer Gruppenantenne
JP3464606B2 (ja) * 1998-03-31 2003-11-10 松下電器産業株式会社 無線通信装置及び無線通信方法
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US6236866B1 (en) * 1998-05-15 2001-05-22 Raytheon Company Adaptive antenna pattern control for a multiple access communication system
US6904024B1 (en) * 1998-10-16 2005-06-07 Alcatel Canada Inc. Cellular base station with integrated multipoint radio access and intercell linking
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US6771989B1 (en) * 1999-05-01 2004-08-03 Nokia Networks Oy Method of directional radio communication
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US7283844B2 (en) * 2000-04-04 2007-10-16 Thompson Scott D Multi-beam antenna wireless network system
US6577879B1 (en) * 2000-06-21 2003-06-10 Telefonaktiebolaget Lm Ericsson (Publ) System and method for simultaneous transmission of signals in multiple beams without feeder cable coherency
FI113590B (fi) * 2000-09-13 2004-05-14 Nokia Corp Menetelmä suunnattujen antennikeilojen muodostamiseksi ja menetelmän toteuttava radiolähetin
US6697643B1 (en) * 2000-10-13 2004-02-24 Telefonaktiebolaget Lm Ericsson (Publ) System and method for implementing a multi-beam antenna without duplex filters within a base station
US7054663B2 (en) 2001-08-01 2006-05-30 Siemens Aktiengesellschaft Method for polar diagram shaping in a radio communications system
DE10137580B4 (de) * 2001-08-01 2009-01-08 Nokia Siemens Networks Gmbh & Co.Kg Verfahren zur Strahlungsdiagrammformung in einem Funkkommunikationssystem
DE10208332A1 (de) * 2002-02-27 2003-09-04 Bosch Gmbh Robert Pulsradarvorrichtung und Verfahren zum Erfassen, zum Detektieren und/oder zum Auswerten von mindestens einem Objekt
US7386305B2 (en) * 2002-09-20 2008-06-10 Qualcomm Incorporated System and method for selectively forming and rotating a transmission beam
DE102004031817B3 (de) * 2004-07-01 2005-11-17 Abb Patent Gmbh Kommunikationssystem im Tagebau oder für den Einsatz auf einem Massengut-Umschlagplatz
FR2997252B1 (fr) * 2012-10-23 2014-12-12 Astrium Sas Procede et systeme de detection de signaux de diffusion emis par des sources terrestres et recus par un satellite
US10028303B2 (en) * 2015-10-26 2018-07-17 Intel IP Corporation Clear channel assessment (CCA) in wireless networks

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Also Published As

Publication number Publication date
DE19535441A1 (de) 1997-03-27
KR19990044103A (ko) 1999-06-25
WO1997011508A1 (fr) 1997-03-27
BR9610594A (pt) 1999-07-06
US6151513A (en) 2000-11-21

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