WO1999012232A1 - Antenna array and method therefor - Google Patents
Antenna array and method therefor Download PDFInfo
- Publication number
- WO1999012232A1 WO1999012232A1 PCT/EP1998/005494 EP9805494W WO9912232A1 WO 1999012232 A1 WO1999012232 A1 WO 1999012232A1 EP 9805494 W EP9805494 W EP 9805494W WO 9912232 A1 WO9912232 A1 WO 9912232A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- far field
- field radiation
- radiation pattern
- antenna array
- unit
- Prior art date
Links
Classifications
-
- 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
- H01Q3/2611—Means for null steering; Adaptive interference nulling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
Definitions
- An antenna array comprising a plurality of antennas having a far field radiation pattern and a complex signal modifying unit for modifying the shape of the far field radiation pattern, wherein the complex signal modifying unit is adapted to converge a plurality of null points within the far field radiation pattern of the plurality of antennas.
- a method of generating a far field radiation pattern for an antenna array comprising the steps of: -7-
- a base station comprising an antenna array including a plurality of antennas having a far field radiation pattern and a complex signal modifying unit for modifying the shape of the far field radiation pattern, wherein the complex signal modifying unit is adapted to converge a plurality of null points within the far field radiation pattern of the plurality of antennas.
- the present invention relates to an antenna array of the type used in a communications system, for example, a cellular telecommunications system, such as a Global System for Mobile Communications (GSM) network.
- GSM Global System for Mobile Communications
- the present invention also relates to a method of generating a far field radiation pattern for the antenna array.
- the adaptive antenna array comprises an array of antennas coupled to a beamforming network in order to generate a far field radiation pattern.
- the far field radiation pattern includes a series of null points independently located therein.
- an antenna array comprising a plurality of antennas having a far field radiation pattern and a complex signal modifying unit for modifying the shape of the -2-
- the complex signal modifying unit is adapted to converge a plurality of null points within the far field radiation pattern of the plurality of antennas.
- a base station comprising an antenna array including a plurality of antennas having a far field radiation pattern and a complex signal modifying unit for modifying the shape of the far field radiation pattern, wherein the complex signal modifying unit is adapted to converge a plurality of null points within the far field radiation pattern of the plurality of antennas.
- a method of generating a far field radiation pattern for an antenna array comprising the steps of: providing a complex signal modifying unit for modifying the shape of the far field radiation pattern, and altering the parameters of the complex signal modifying unit so as to converge a plurality of null points within the far field radiation pattern of the antenna array.
- FIG. 1 is a schematic representation of an apparatus constituting an embodiment of the present invention.
- FIG. 2 is a schematic diagram of antenna radiation patterns relating to the apparatus of FIG. 1, and
- FIG. 3 is a flow diagram of the operation of the embodiment of FIG. 1.
- a base station 101 (FIG. 1) in a communications system includes, inter alia, an adaptive antenna transmitter receiver chain 100, or transceiver.
- the adaptive antenna transmitter receiver chain 100 (FIG. 1) comprises an antenna array 102 coupled to a duplexer 104.
- the duplexer 104 is coupled to a Radio Frequency (RF) transmitter and up-converter 108 and an RF receiver and down-converter 106, the RF transmitter and up- converter 108 being coupled to a baseband beamforming unit 110 having an input terminal for modulated signals to be transmitted.
- RF Radio Frequency
- the RF receiver and down- converter 106 is coupled to an optimum reception beamforming unit 112, a direction-of-arrival beamforming unit 114 and a baseband beamforming unit 116, each of which are connected to a summing unit 118.
- the RF receiver and down- converter 106 is also coupled to a "dummy" interferer addition unit 122.
- the baseband beamforming unit 116 is coupled to an equaliser 120 having an output terminal.
- the summing unit 118 is coupled to a "dummy" interferer addition unit 122 which is coupled to an optimum beamforming unit 124.
- the optimum beamforming unit 124 is coupled to the baseband beamforming unit 110.
- the complex signal modifying unit can include a digital signal processing unit or a phase and amplitude modifier.
- a first and second uplink signal u ⁇ , u 12 constituting multipath signals, is received (step 302) by the RF receiver and down- converter 106 via the antenna array 102 and the duplexer 104.
- the first and second uplink signals u u , u 12 are received from a mobile terminal 126, receipt of transmissions from which is desirable.
- the optimum beamforming unit 112 then generates (step 304) an optimum beamforming pattern 200.
- the optimum beamforming pattern 200 is a far field radiation pattern shaped so as to provide gain for signals, the receipt of which is desired, whilst attenuating unwanted signals.
- the signal is most attenuated at the location of null points 201 in the far field radiation pattern.
- the direction-of-arrival beamforming unit 114 generates (step 306) a Direction of Arrival (DOA) beam pattern 202.
- DOA Direction of Arrival
- the DOA beam pattern 202 is a far field radiation pattern corresponding to all electromagnetic radiation received by the antenna array 102.
- the optimum beamforming pattern 200 is then subtracted (step 308) from the DOA beam pattern 202 by the summing unit 118 in order to generate an interferer far field radiation pattern 204 having a main lobes corresponding to the existence of an undesired, or interfering, signal 1 ⁇ Similarly, it is also undesirable to cause interference to the source of the interfering signal I 1; for example, another mobile terminal (not shown), when transmitting using the adaptive antenna array 102.
- the interferer far field radiation pattern 204 is then received by the "dummy" interferer addition unit 122 which generates a modified signal by modelling a predetermined number of additional interference sources.
- the additional interference sources corresponding to "dummy" sources of interference are superimposed on the signal received from the RF receiver and down-converter 106.
- the modified signal is then processed by the optimum beamforming unit 124 in order to calculate (step 312) a new set of antenna weights for generating a new far field radiation pattern 206 having null points 208 converging in a -5-
- Downlink signals are then transmitted by the adaptive antenna array 102 using the new set of weights (step 314).
Abstract
Description
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU95347/98A AU9534798A (en) | 1997-08-29 | 1998-08-24 | Antenna array and method therefor |
CA002302299A CA2302299A1 (en) | 1997-08-29 | 1998-08-24 | Antenna array and method therefor |
EP98948884A EP1010212A1 (en) | 1997-08-29 | 1998-08-24 | Antenna array and method therefor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9718192.9 | 1997-08-29 | ||
GB9718192A GB2328800A (en) | 1997-08-29 | 1997-08-29 | Antenna array arrangement with converging nulls |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999012232A1 true WO1999012232A1 (en) | 1999-03-11 |
Family
ID=10818131
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1998/005494 WO1999012232A1 (en) | 1997-08-29 | 1998-08-24 | Antenna array and method therefor |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1010212A1 (en) |
CN (1) | CN1272229A (en) |
AU (1) | AU9534798A (en) |
CA (1) | CA2302299A1 (en) |
GB (1) | GB2328800A (en) |
RU (1) | RU2000107806A (en) |
WO (1) | WO1999012232A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001073894A1 (en) * | 2000-03-27 | 2001-10-04 | China Academy Of Telecommunications Technology,Mii | A method for improving intelligent antenna array coverage |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2349045A (en) * | 1999-04-16 | 2000-10-18 | Fujitsu Ltd | Base station transmission beam pattern forming; interference reduction |
JP3445201B2 (en) | 1999-10-21 | 2003-09-08 | 松下電器産業株式会社 | Array antenna wireless communication apparatus and weighting coefficient generation method |
JP4241440B2 (en) * | 2004-03-03 | 2009-03-18 | 株式会社日立製作所 | Packet scheduling method and wireless communication apparatus |
EP1777852A4 (en) * | 2004-08-12 | 2011-12-07 | Fujitsu Ltd | Receiver, transmitter, and reception method |
JP5556154B2 (en) * | 2009-12-03 | 2014-07-23 | 日本電気株式会社 | Antenna beam directing device and antenna beam directing method |
US10256922B2 (en) * | 2017-08-04 | 2019-04-09 | Rohde & Schwarz Gmbh & Co. Kg | Calibration method and system |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997000543A1 (en) * | 1995-06-16 | 1997-01-03 | Watkins-Johnson Company | Method and apparatus for adaptive transmission beam forming in a wireless communication system |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2044008B (en) * | 1979-02-21 | 1983-05-05 | Ford Aerospace & Communication | Null control or multiple beam antenna |
GB2188782B (en) * | 1985-07-18 | 1989-08-23 | Stc Plc | Adaptive antenna |
US4916454A (en) * | 1989-06-05 | 1990-04-10 | Allied-Signal Inc. | Adaptive nulling circular array antenna |
US5343211A (en) * | 1991-01-22 | 1994-08-30 | General Electric Co. | Phased array antenna with wide null |
-
1997
- 1997-08-29 GB GB9718192A patent/GB2328800A/en not_active Withdrawn
-
1998
- 1998-08-24 CA CA002302299A patent/CA2302299A1/en not_active Abandoned
- 1998-08-24 EP EP98948884A patent/EP1010212A1/en not_active Withdrawn
- 1998-08-24 RU RU2000107806/09A patent/RU2000107806A/en not_active Application Discontinuation
- 1998-08-24 AU AU95347/98A patent/AU9534798A/en not_active Abandoned
- 1998-08-24 CN CN 98809578 patent/CN1272229A/en active Pending
- 1998-08-24 WO PCT/EP1998/005494 patent/WO1999012232A1/en not_active Application Discontinuation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997000543A1 (en) * | 1995-06-16 | 1997-01-03 | Watkins-Johnson Company | Method and apparatus for adaptive transmission beam forming in a wireless communication system |
Non-Patent Citations (3)
Title |
---|
LEE E A ET AL: "AN OPEN-LOOP NULLING ALGORITHM FOR OPTIMAL NULLING RESOLUTION WITH A MBA ANTI-JAM ANTENNA", INTERNATIONAL SYMPOSIUM ON ANTENNAS AND PROPAGATION, SAN JOSE, JUNE 26 - 30, 1989, vol. 3, 26 June 1989 (1989-06-26), INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, pages 1670 - 1673, XP000079423 * |
TAKAO ET AL.: "An Adaptive Antenna for Rejection of Wideband Interference", IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS., vol. 16, no. 4, July 1980 (1980-07-01), NEW YORK US, pages 452 - 459, XP002090726 * |
WHITE: "A Multiple-Beam Architecture for Sidelobe Cancellors", IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS., vol. 23, no. 5, September 1987 (1987-09-01), NEW YORK US, pages 612 - 619, XP002090727 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001073894A1 (en) * | 2000-03-27 | 2001-10-04 | China Academy Of Telecommunications Technology,Mii | A method for improving intelligent antenna array coverage |
US6738016B2 (en) | 2000-03-27 | 2004-05-18 | China Academy Of Telecommunications Technology | Method for improving smart antenna array coverage |
AU2001225003B2 (en) * | 2000-03-27 | 2005-03-17 | China Academy Of Telecommunications Technology | A method for improving intelligent antenna array coverage |
Also Published As
Publication number | Publication date |
---|---|
EP1010212A1 (en) | 2000-06-21 |
RU2000107806A (en) | 2002-03-27 |
CN1272229A (en) | 2000-11-01 |
GB2328800A (en) | 1999-03-03 |
AU9534798A (en) | 1999-03-22 |
GB9718192D0 (en) | 1997-11-05 |
CA2302299A1 (en) | 1999-03-11 |
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