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WO2004017539A1 - Systeme de communication sans fil et procede d'exploitation d'un tel systeme - Google Patents

Systeme de communication sans fil et procede d'exploitation d'un tel systeme Download PDF

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Publication number
WO2004017539A1
WO2004017539A1 PCT/GB2003/003208 GB0303208W WO2004017539A1 WO 2004017539 A1 WO2004017539 A1 WO 2004017539A1 GB 0303208 W GB0303208 W GB 0303208W WO 2004017539 A1 WO2004017539 A1 WO 2004017539A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
signal
base station
level
antenna element
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.)
Ceased
Application number
PCT/GB2003/003208
Other languages
English (en)
Inventor
Simon Reza Saunders
Vasileios Nikolopoulos
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.)
University of Surrey
Original Assignee
University of Surrey
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 University of Surrey filed Critical University of Surrey
Priority to AU2003285690A priority Critical patent/AU2003285690A1/en
Publication of WO2004017539A1 publication Critical patent/WO2004017539A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H04B7/0868—Hybrid systems, i.e. switching and combining
    • H04B7/0874—Hybrid systems, i.e. switching and combining using subgroups of receive antennas
    • 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
    • H04B7/0802—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 antenna selection
    • H04B7/0805—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 antenna selection with single receiver and antenna switching
    • H04B7/0814—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 antenna selection with single receiver and antenna switching based on current reception conditions, e.g. switching to different antenna when signal level is below threshold
    • 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
    • H04B7/0802—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 antenna selection
    • H04B7/0817—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 antenna selection with multiple receivers and antenna path selection
    • H04B7/082—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 antenna selection with multiple receivers and antenna path selection selecting best antenna path

Definitions

  • This invention relates to a wireless communication system and a method of operating
  • the invention concerns wireless communication systems having distributed antenna
  • the power levels transmitted by mobile users are subjected to
  • PC constant power control
  • the signal strength received at the base station may well be
  • control imposed on one channel is independent of the power control imposed on an
  • the signal produced by each mobile user is received by a plurality of
  • At least one said antenna element can be deselected by
  • a wireless communication system including a base station and an antenna arrangement
  • the method including deselecting at
  • At least one said antenna element by selectively excluding the respective antenna signal
  • An embodiment of a wireless communication system according to the invention is
  • Figure 1 illustrates a distributed antenna arrangement of which the individual antenna
  • DAE distributed control elements
  • Figure 2 illustrates deployment of two distributed antenna arrangements in a building
  • FIG. 3 shows test results obtained using one of the distributed antenna arrangements
  • Figure 4 shows test results obtained using another of the distributed antenna
  • the mobile user (MS) is very close to one of the antenna
  • the antenna elements This is illustrated by the following example.
  • the minimum output power P ⁇ that can be transmitted by a mobile user is typically -44dBm.
  • DAE 1 a nearby antenna element
  • the maximum level would need to be adjusted to - 91.75dBm. Since the
  • SINR signal-to-interference-plus-noise ratio requirement
  • RxSens would become -109.75dBm (i.e. -91.75dBm-18dB) which, of course, is much
  • the nearby antenna In accordance with this embodiment of the invention, the nearby antenna
  • element DAE 1 is deselected by excluding its antenna signal from processing by the
  • Wireless communication systems having active and passive distributed antenna
  • each antenna element has a
  • receiver (or at least a low noise amplifier) which can detect the received signal level.
  • the base station monitors the detected signal levels and deselects any antenna element
  • the base station monitors the
  • the base station would deselect
  • ceil[.] represents the next highest integer.
  • antenna elements respectively were deployed to provide coverage in a 13-storey
  • the building includes a number of offices with different dimensions and is
  • CDMA system is approximately 13, as given by the following capacity equation:
  • M ⁇ x is the maximum number of users of a W-CDMA system
  • W is the W- CDMA chip rate
  • R is the bit rate of the service
  • f is the inter-cell interference factor (other cell-to-home-cell
  • QoS quality of service
  • Inter-cell interference factor values, f, between the interval 0.4-0.6 have been
  • inter-cell interference factor was assumed to be 0.2, as proposed in
  • the deployed distributed antenna arrangement having eight antenna elements are
  • the antenna element the capacity has more than halved (6 users instead of 13)
  • the effect of deselecting the antenna element receiving the strongest signal can be
  • one antenna element is deselected at a time. Based on a uniform user
  • Figure 4 illustrates the effect of deselection using a distributed antenna arrangement

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un système de communication sans fil possédant un système d'antennes réparties et la capacité d'annuler la sélection d'un élément d'antenne excluant ainsi le signal d'antenne du traitement si le niveau de signal d'antenne excède un seuil prédéfini.
PCT/GB2003/003208 2002-08-16 2003-07-29 Systeme de communication sans fil et procede d'exploitation d'un tel systeme Ceased WO2004017539A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003285690A AU2003285690A1 (en) 2002-08-16 2003-07-29 Wireless communication system and a method of operating a wireless communication system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0219170.8 2002-08-16
GB0219170A GB0219170D0 (en) 2002-08-16 2002-08-16 Wireless communication system and a method of operating a wireless communication system

Publications (1)

Publication Number Publication Date
WO2004017539A1 true WO2004017539A1 (fr) 2004-02-26

Family

ID=9942491

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2003/003208 Ceased WO2004017539A1 (fr) 2002-08-16 2003-07-29 Systeme de communication sans fil et procede d'exploitation d'un tel systeme

Country Status (3)

Country Link
AU (1) AU2003285690A1 (fr)
GB (1) GB0219170D0 (fr)
WO (1) WO2004017539A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021183015A1 (fr) * 2020-03-12 2021-09-16 Telefonaktiebolaget Lm Ericsson (Publ) Appareil d'antenne et procédé dans un appareil d'antenne pour combiner sélectivement des sorties d'antenne

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0477158A2 (fr) * 1990-09-21 1992-03-25 Ericsson Inc. Système de réception en diversité
EP0620657A1 (fr) * 1993-04-16 1994-10-19 Matsushita Electric Industrial Co., Ltd. Circuit de commutation d'antenne pour un récepteur en diversité
US5669066A (en) * 1993-05-14 1997-09-16 Telefonaktiebolaget Lm Ericsson Dynamic control of transmitting power at a transmitter and attenuation at a receiver

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0477158A2 (fr) * 1990-09-21 1992-03-25 Ericsson Inc. Système de réception en diversité
EP0620657A1 (fr) * 1993-04-16 1994-10-19 Matsushita Electric Industrial Co., Ltd. Circuit de commutation d'antenne pour un récepteur en diversité
US5669066A (en) * 1993-05-14 1997-09-16 Telefonaktiebolaget Lm Ericsson Dynamic control of transmitting power at a transmitter and attenuation at a receiver

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
DATABASE INSPEC [online] INSTITUTE OF ELECTRICAL ENGINEERS, STEVENAGE, GB; NIKOLOPOULOS V ET AL: "Deselection of antenna elements for avoiding blocking effects", XP002253629, Database accession no. 7665056 *
DIETRICH C B ET AL: "SMART ANTENNAS IN WIRELESS COMMUNICATIONS: BASE-STATION DIVERSITY AND HANDSET BEAMFORMING", IEEE ANTENNAS AND PROPAGATION MAGAZINE, IEEE INC, NEW YORK, US, vol. 42, no. 5, October 2000 (2000-10-01), pages 142 - 151, XP000966672, ISSN: 1045-9243 *
TWELFTH INTERNATIONAL CONFERENCE ON ANTENNAS AND PROPAGATION. ICAP 2003 (IEE CONF.PUBL. NO.491), TWELFTH INTERNATIONAL CONFERENCE ON ANTENNAS AND PROPAGATION (ICAP 2003), EXETER, UK, 31 MARCH-3 APRIL 2003, 2003, London, UK, IEE, UK, pages 203 - 206 vol.1, ISBN: 0-85296-752-7 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021183015A1 (fr) * 2020-03-12 2021-09-16 Telefonaktiebolaget Lm Ericsson (Publ) Appareil d'antenne et procédé dans un appareil d'antenne pour combiner sélectivement des sorties d'antenne
US11916639B2 (en) 2020-03-12 2024-02-27 Telefonaktiebolaget Lm Ericsson (Publ) Antenna apparatus and method in an antenna apparatus for selectively combining antenna outputs

Also Published As

Publication number Publication date
AU2003285690A1 (en) 2004-03-03
GB0219170D0 (en) 2002-09-25

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