WO2002007341A3 - Systeme de radiotelecommunication cellulaire - Google Patents

Systeme de radiotelecommunication cellulaire Download PDF

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Publication number
WO2002007341A3
WO2002007341A3 PCT/GB2001/003185 GB0103185W WO0207341A3 WO 2002007341 A3 WO2002007341 A3 WO 2002007341A3 GB 0103185 W GB0103185 W GB 0103185W WO 0207341 A3 WO0207341 A3 WO 0207341A3
Authority
WO
WIPO (PCT)
Prior art keywords
phase
downlink signal
telecommunication system
cellular radio
time
Prior art date
Application number
PCT/GB2001/003185
Other languages
English (en)
Other versions
WO2002007341A2 (fr
Inventor
Andrew Fogg
John Leslie Haine
Original Assignee
Ip Access Ltd
Andrew Fogg
John Leslie Haine
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
Priority claimed from GB0017427A external-priority patent/GB0017427D0/en
Application filed by Ip Access Ltd, Andrew Fogg, John Leslie Haine filed Critical Ip Access Ltd
Priority to AU2001270832A priority Critical patent/AU2001270832A1/en
Publication of WO2002007341A2 publication Critical patent/WO2002007341A2/fr
Publication of WO2002007341A3 publication Critical patent/WO2002007341A3/fr

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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0667—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal
    • H04B7/0671—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal using different delays between 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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0667—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal
    • H04B7/0676—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal using random or pseudo-random delays

Landscapes

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

Abstract

L'invention concerne un système de radiotélécommunication cellulaire comprenant une station de base pourvue de deux antennes (107, 114) au moins. Chaque antenne est conçue pour transmettre un signal descendant à une ou plusieurs unités d'abonné mobiles. Lesdits signaux descendants que transmettent les antennes (107, 114) présentent entre eux une certain décalage temporel et une certaine différence de phase, laquelle différence de phase change de temps en temps. En raison de ces différences de phase, si les signaux reçus au niveau d'une station mobile sont en anti-phase sur un intervalle de temps donné du signal descendant, il est fort peu probable que lesdits signaux soient également en anti-phase au niveau de l'intervalle de temps correspondant dans les quelques trames suivantes.
PCT/GB2001/003185 2000-07-14 2001-07-16 Systeme de radiotelecommunication cellulaire WO2002007341A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001270832A AU2001270832A1 (en) 2000-07-14 2001-07-16 Cellular radio telecommunication system

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB0017427A GB0017427D0 (en) 2000-07-14 2000-07-14 Cellular radio telecommunication system
GB0017427.6 2000-07-14
GB0114031.8 2001-06-08
GB0114031A GB2365281A (en) 2000-07-14 2001-06-08 Transmit diversity in an indoor gsm cellular system comprising a base station having at least two antennas having mutual time delay and phase difference

Publications (2)

Publication Number Publication Date
WO2002007341A2 WO2002007341A2 (fr) 2002-01-24
WO2002007341A3 true WO2002007341A3 (fr) 2002-05-30

Family

ID=26244667

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2001/003185 WO2002007341A2 (fr) 2000-07-14 2001-07-16 Systeme de radiotelecommunication cellulaire

Country Status (2)

Country Link
AU (1) AU2001270832A1 (fr)
WO (1) WO2002007341A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8886249B2 (en) 2004-07-30 2014-11-11 Airvana Lp Method and system of setting transmitter power levels

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1779625B1 (fr) 2004-07-30 2018-10-17 CommScope Technologies LLC Noeud de reseau local
EP1779543B1 (fr) 2004-07-30 2012-04-25 Andrew Richardson Procede de transmission de signaux a partir d'un noeud de reseau local
PT2280495E (pt) 2005-09-01 2012-05-25 Sharp Kk Método de transmissão sem fios
EP2034624B1 (fr) 2005-10-31 2011-05-25 Sharp Kabushiki Kaisha Emetteur sans fil
EP1944893B1 (fr) 2005-10-31 2020-01-01 Sharp Kabushiki Kaisha Emetteur radio, systeme de radiocommunications, et procede d'emission radio
ES2382933T3 (es) 2005-12-20 2012-06-14 Sharp Kabushiki Kaisha Método de control de transmisión, estación base, unidad móvil y sistema de comunicación con diversidad de retardo
CN103354465A (zh) 2005-12-26 2013-10-16 夏普株式会社 无线发射机及无线发射方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995012927A1 (fr) * 1993-11-04 1995-05-11 Nokia Telecommunications Oy Procede d'emission de signaux radio et emetteur-recepteur armt
US6034987A (en) * 1996-12-17 2000-03-07 Ericsson Inc. System for improving the quality of a received radio signal

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995012927A1 (fr) * 1993-11-04 1995-05-11 Nokia Telecommunications Oy Procede d'emission de signaux radio et emetteur-recepteur armt
US6034987A (en) * 1996-12-17 2000-03-07 Ericsson Inc. System for improving the quality of a received radio signal

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
MOGENSEN P E: "GSM BASE-STATION ANTENNA DIVERSITY USING SOFT DECISION COMBINING ON UP-LINK AND DELAYED-SIGNAL TRANSMISSION ON DOWN-LINK", PERSONAL COMMUNICATION - FREEDOM THROUGH WIRELESS TECHNOLOGY. SECAUCUS, NJ., MAY 18 - 20, 1993, PROCEEDINGS OF THE VEHICULAR TECHNOLOGY CONFERENCE, NEW YORK, IEEE, US, vol. CONF. 43, 18 May 1993 (1993-05-18), pages 611 - 616, XP000393257, ISBN: 0-7803-1267-8 *
VIJITHA WEERACKODY: "CHARACTERISTICS OF A SIMULATED FAST FADING INDOOR RADIO CHANNEL", PERSONAL COMMUNICATION - FREEDOM THROUGH WIRELESS TECHNOLOGY. SECAUCUS, NJ., MAY 18 - 20, 1993, PROCEEDINGS OF THE VEHICULAR TECHNOLOGY CONFERENCE, NEW YORK, IEEE, US, vol. CONF. 43, 18 May 1993 (1993-05-18), pages 231 - 235, XP000393165, ISBN: 0-7803-1267-8 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8886249B2 (en) 2004-07-30 2014-11-11 Airvana Lp Method and system of setting transmitter power levels

Also Published As

Publication number Publication date
WO2002007341A2 (fr) 2002-01-24
AU2001270832A1 (en) 2002-01-30

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