WO1998042150A3 - Downlink smart antennas for is-54/is-136 tdma systems - Google Patents

Downlink smart antennas for is-54/is-136 tdma systems Download PDF

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Publication number
WO1998042150A3
WO1998042150A3 PCT/US1998/003633 US9803633W WO9842150A3 WO 1998042150 A3 WO1998042150 A3 WO 1998042150A3 US 9803633 W US9803633 W US 9803633W WO 9842150 A3 WO9842150 A3 WO 9842150A3
Authority
WO
WIPO (PCT)
Prior art keywords
downlink
users
antenna pattern
antenna
interference
Prior art date
Application number
PCT/US1998/003633
Other languages
French (fr)
Other versions
WO1998042150A2 (en
Inventor
Carol Catalano Martin
Nelson Ray Sollenberger
Jack Harriman Winters
Original Assignee
At & T Corp
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 At & T Corp filed Critical At & T Corp
Publication of WO1998042150A2 publication Critical patent/WO1998042150A2/en
Publication of WO1998042150A3 publication Critical patent/WO1998042150A3/en

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Classifications

    • 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
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/2605—Array of radiating elements provided with a feedback control over the element weights, e.g. adaptive arrays
    • 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

Landscapes

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

Abstract

A technique for using downlink smart antennas at the base station increases gain and improves directivity in the downlink channel thereby improving mobile signal quality, mitigating downlink multipath, improving frequency reuse, and reducing interference to other users. The smart antenna downlink technique of the present invention does not require changes to the IS-54/IS-136 Time Division Multiple Access air interference standard or to the mobiles. According to the present invention, in a wireless communication system, a method for communicating between a base station and a plurality of users includes using the same antenna pattern for transmission to all users, and adjusting the antenna pattern to improve the performance measure of the system. In this case, the performance measure can include the bit error rate, the received signal strength, and/or co-channel interference measurements. A fixed multibeam antenna and power control is used to optimize the downlink antenna pattern to each user. As a result, greater coverage is obtained and less co-channel interference is experienced.
PCT/US1998/003633 1997-03-14 1998-02-25 Downlink smart antennas for is-54/is-136 tdma systems WO1998042150A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US4045497P 1997-03-14 1997-03-14
US60/040,454 1997-03-14

Publications (2)

Publication Number Publication Date
WO1998042150A2 WO1998042150A2 (en) 1998-09-24
WO1998042150A3 true WO1998042150A3 (en) 1998-12-03

Family

ID=21911063

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/003633 WO1998042150A2 (en) 1997-03-14 1998-02-25 Downlink smart antennas for is-54/is-136 tdma systems

Country Status (1)

Country Link
WO (1) WO1998042150A2 (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6216244B1 (en) 1998-10-07 2001-04-10 Cisco Systems, Inc. Point-to-multipoint variable antenna compensation system
AU1167901A (en) * 1999-04-29 2001-01-31 Telefonaktiebolaget Lm Ericsson (Publ) Integrated adaptive and sector antennas
US6453177B1 (en) * 1999-07-14 2002-09-17 Metawave Communications Corporation Transmitting beam forming in smart antenna array system
US6640104B1 (en) 1999-12-28 2003-10-28 Lucent Technologies Inc. Dynamic channel assignment for intelligent antennas
US6411817B1 (en) * 2000-01-21 2002-06-25 Lucent Technologies Inc. Method and system for dynamic downlink power control in a time-division, multiplex wireless system
GB2363256B (en) * 2000-06-07 2004-05-12 Motorola Inc Adaptive antenna array and method of controlling operation thereof
GB0016186D0 (en) 2000-06-30 2000-08-23 Nokia Networks Oy Antenna system
GB0020088D0 (en) 2000-08-15 2000-10-04 Fujitsu Ltd Adaptive beam forming
KR100452536B1 (en) * 2000-10-02 2004-10-12 가부시키가이샤 엔.티.티.도코모 Mobile communication base station equipment
GB0102316D0 (en) * 2001-01-30 2001-03-14 Koninkl Philips Electronics Nv Radio communication system
FR2821514B1 (en) 2001-02-28 2003-06-13 Jacques Lewiner LOCAL RADIO COMMUNICATION SYSTEM
GB2376568B (en) * 2001-06-12 2005-06-01 Mobisphere Ltd Improvements in or relating to smart antenna arrays
GB2376567B (en) 2001-06-12 2005-07-20 Mobisphere Ltd Improvements in or relating to smart antenna arrays
US7327800B2 (en) 2002-05-24 2008-02-05 Vecima Networks Inc. System and method for data detection in wireless communication systems
US7327795B2 (en) 2003-03-31 2008-02-05 Vecima Networks Inc. System and method for wireless communication systems
DE10328570B4 (en) 2003-06-25 2005-08-25 Infineon Technologies Ag Method for reducing the radiation load by a mobile radio terminal with directional radiation and mobile radio terminal with directional radiation
US7489282B2 (en) 2005-01-21 2009-02-10 Rotani, Inc. Method and apparatus for an antenna module
CA2637182C (en) 2006-02-28 2015-04-28 Rotani, Inc. Methods and apparatus for overlapping mimo antenna physical sectors
CN104577356B (en) * 2013-10-12 2018-05-29 华为技术有限公司 Antenna system and base station

Citations (5)

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Publication number Priority date Publication date Assignee Title
EP0352787A2 (en) * 1988-07-28 1990-01-31 Motorola, Inc. High bit rate communication system for overcoming multipath
EP0639035A1 (en) * 1993-08-12 1995-02-15 Nortel Networks Corporation Base station antenna arrangement
WO1995026116A1 (en) * 1994-03-24 1995-09-28 Ericsson Inc. Phased array cellular base station and associated methods for enhanced power efficiency
WO1996007285A1 (en) * 1994-08-27 1996-03-07 Philips Electronics N.V. Microwave video distribution system and adaptable microwave transmitter
WO1996037969A1 (en) * 1995-05-24 1996-11-28 Nokia Telecommunications Oy Method for transmitting a pilot signal, and a cellular radio system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0352787A2 (en) * 1988-07-28 1990-01-31 Motorola, Inc. High bit rate communication system for overcoming multipath
EP0639035A1 (en) * 1993-08-12 1995-02-15 Nortel Networks Corporation Base station antenna arrangement
WO1995026116A1 (en) * 1994-03-24 1995-09-28 Ericsson Inc. Phased array cellular base station and associated methods for enhanced power efficiency
WO1996007285A1 (en) * 1994-08-27 1996-03-07 Philips Electronics N.V. Microwave video distribution system and adaptable microwave transmitter
WO1996037969A1 (en) * 1995-05-24 1996-11-28 Nokia Telecommunications Oy Method for transmitting a pilot signal, and a cellular radio system

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
JUNIUS M ET AL: "SIMULATION OF GSM HANDOVER AND POWER CONTROL BASED ON PROPOGATION MEASUREMENTS IN THE GERMAN D1 NETWORK", PROCEEDINGS OF THE NORDIC SEMINAR ON DIGITAL MOBILE RADIO COMMUNICATIONS, HELSINKI, DEC. 1 - 3, 1992, no. SEMINAR 5, 1 December 1992 (1992-12-01), TELECOM FINLAND, pages 367 - 372, XP000458676 *
MICHEL MOULY ET AL: "Power Control", GSM SYSTEM FOR MOBILE COMMUNICATIONS, 1993, MOULY M;PAUTET M-B, pages 366 - 373, 424 - 429, XP002079145 *

Also Published As

Publication number Publication date
WO1998042150A2 (en) 1998-09-24

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