TW200709595A - Wireless communication method and apparatus for forming, steering and selectively receiving a sufficient number of usable beam paths in both azimuth and elevation - Google Patents
Wireless communication method and apparatus for forming, steering and selectively receiving a sufficient number of usable beam paths in both azimuth and elevationInfo
- Publication number
- TW200709595A TW200709595A TW095112741A TW95112741A TW200709595A TW 200709595 A TW200709595 A TW 200709595A TW 095112741 A TW095112741 A TW 095112741A TW 95112741 A TW95112741 A TW 95112741A TW 200709595 A TW200709595 A TW 200709595A
- Authority
- TW
- Taiwan
- Prior art keywords
- receiver
- wireless communication
- data stream
- transmitter
- sufficient number
- Prior art date
Links
- 238000000034 method Methods 0.000 title abstract 3
Classifications
-
- 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
-
- 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
- H04B7/0615—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 weighted versions of same signal
- H04B7/0617—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 weighted versions of same signal for beam forming
-
- 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
- H04B7/0837—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 pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/086—Weighted combining using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Radio Transmission System (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Relay Systems (AREA)
- Aerials With Secondary Devices (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US62289904P | 2004-10-28 | 2004-10-28 | |
US11/014,290 US7551680B2 (en) | 2004-10-28 | 2004-12-16 | Wireless communication method and apparatus for forming, steering and selectively receiving a sufficient number of usable beam paths in both azimuth and elevation |
Publications (1)
Publication Number | Publication Date |
---|---|
TW200709595A true TW200709595A (en) | 2007-03-01 |
Family
ID=36261853
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW102116436A TW201347453A (zh) | 2004-10-28 | 2005-09-14 | 形橙、操控及選擇性接收方位角及仰角兩者中足夠可用波束路徑數量之無線通信方法及裝置 |
TW098100242A TW200943779A (en) | 2004-10-28 | 2005-09-14 | Wireless communication method and apparatus for forming, steering and selectively receiving a sufficient number of usable beam paths in both azimuth and elevation |
TW095112741A TW200709595A (en) | 2004-10-28 | 2005-09-14 | Wireless communication method and apparatus for forming, steering and selectively receiving a sufficient number of usable beam paths in both azimuth and elevation |
TW094131745A TWI292261B (en) | 2004-10-28 | 2005-09-14 | Wireless communication method and apparatus for forming, steering and selectively receiving a sufficient number of usable beam paths in both azimuth and elevation |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW102116436A TW201347453A (zh) | 2004-10-28 | 2005-09-14 | 形橙、操控及選擇性接收方位角及仰角兩者中足夠可用波束路徑數量之無線通信方法及裝置 |
TW098100242A TW200943779A (en) | 2004-10-28 | 2005-09-14 | Wireless communication method and apparatus for forming, steering and selectively receiving a sufficient number of usable beam paths in both azimuth and elevation |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW094131745A TWI292261B (en) | 2004-10-28 | 2005-09-14 | Wireless communication method and apparatus for forming, steering and selectively receiving a sufficient number of usable beam paths in both azimuth and elevation |
Country Status (10)
Country | Link |
---|---|
US (2) | US7551680B2 (zh) |
EP (1) | EP1805910A4 (zh) |
JP (1) | JP2008518554A (zh) |
KR (2) | KR100902810B1 (zh) |
CN (1) | CN101375522B (zh) |
CA (1) | CA2584316A1 (zh) |
MX (1) | MX2007005034A (zh) |
NO (1) | NO20072675L (zh) |
TW (4) | TW201347453A (zh) |
WO (1) | WO2006049705A2 (zh) |
Families Citing this family (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7548764B2 (en) * | 2005-03-04 | 2009-06-16 | Cisco Technology, Inc. | Method and system for generating multiple radiation patterns using transform matrix |
EP1722583A1 (de) * | 2005-05-11 | 2006-11-15 | Siemens Aktiengesellschaft | Beam-Hopping in einem Funkkommunikationssystem |
US8588220B2 (en) * | 2005-12-30 | 2013-11-19 | L-3 Communications Corporation | Method and apparatus for mitigating port swapping during signal tracking |
DE602006021344D1 (de) | 2006-01-04 | 2011-05-26 | Ericsson Telefon Ab L M | Gruppenantennenanordnung |
US7838188B2 (en) | 2006-03-29 | 2010-11-23 | Ricoh Company, Ltd. | Electrophotographic photoconductor, image forming method, image forming apparatus, and process cartridge |
JP5418770B2 (ja) * | 2009-07-29 | 2014-02-19 | トヨタ自動車株式会社 | レーダ装置 |
GB2472272A (en) * | 2009-07-31 | 2011-02-02 | Cambridge Silicon Radio Ltd | An amplifier circuit for a transceiver includes a common amplifier which forms part of both a receive cascode and a transmit cascode |
US8421684B2 (en) * | 2009-10-01 | 2013-04-16 | Qualcomm Incorporated | Methods and apparatus for beam steering using steerable beam antennas with switched parasitic elements |
US8581794B1 (en) | 2010-03-04 | 2013-11-12 | Qualcomm Incorporated | Circular antenna array systems |
CN103002497A (zh) * | 2011-09-08 | 2013-03-27 | 华为技术有限公司 | 基于aas的信息交互方法、系统、ue及基站 |
US9270022B2 (en) * | 2011-11-11 | 2016-02-23 | Telefonaktiebolaget L M Ericsson | Method, apparatus and system of antenna array dynamic configuration |
US20130229309A1 (en) * | 2012-03-01 | 2013-09-05 | Nokia Siemens Networks Oy | Beam alignment method utilizing omni-directional sounding and use thereof |
JP5961139B2 (ja) * | 2013-05-22 | 2016-08-02 | 日本電信電話株式会社 | 無線通信システム、送信機、および受信機 |
CN104768099B (zh) * | 2014-01-02 | 2018-02-13 | 中国科学院声学研究所 | 用于圆环形阵的模态波束形成器及频域宽带实现方法 |
JP6438203B2 (ja) * | 2014-03-20 | 2018-12-12 | 株式会社Nttドコモ | 基地局及びユーザ装置 |
CN107785665B (zh) * | 2014-06-30 | 2020-02-14 | 华为技术有限公司 | 一种混合结构双频双波束三列相控阵天线 |
CN105471771B (zh) * | 2014-08-28 | 2021-01-12 | 北京三星通信技术研究有限公司 | 信道方向信息的获取方法和设备 |
KR102363547B1 (ko) | 2014-11-26 | 2022-02-17 | 삼성전자주식회사 | 빔포밍을 이용한 통신 방법 및 장치 |
EP3086486A1 (en) * | 2015-04-22 | 2016-10-26 | ABB Technology Ltd | A communication network, a power converter cabinet and a method therefore |
US10564249B2 (en) * | 2015-07-17 | 2020-02-18 | Huawei Technologies Canada Co., Ltd. | Waveguide structure for use in direction-of-arrival determination system and associated determination method |
CN107710654B (zh) | 2015-08-05 | 2019-05-14 | 三菱电机株式会社 | 无线通信装置 |
FR3041167B1 (fr) * | 2015-09-11 | 2019-05-31 | Valeo Comfort And Driving Assistance | Unite electronique de commande de vehicule automobile et procede de controle de fonctionnalites du vehicule automobile au moyen d'un terminal mobile |
JP2017116402A (ja) * | 2015-12-24 | 2017-06-29 | 日本電産エレシス株式会社 | 車載用レーダ装置 |
CN108604914A (zh) | 2016-01-27 | 2018-09-28 | 斯塔里有限公司 | 高频无线接入网络 |
DE102016213226A1 (de) * | 2016-02-12 | 2017-08-17 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Vorrichtung und Verfahren zur Bestimmung einer Position eines Senders |
KR102614380B1 (ko) * | 2017-02-08 | 2023-12-15 | 한국전자통신연구원 | 단일 rf 체인 안테나를 이용한 통신 방법 및 장치 |
EP3596479B1 (en) * | 2017-03-16 | 2023-08-02 | MVG Industries | Method and system for the testing of an antenna comprising a plurality of radiating elements |
US10620293B2 (en) * | 2017-11-02 | 2020-04-14 | The Boeing Company | Determining direction of arrival of an electromagnetic wave |
US11082098B2 (en) * | 2019-05-11 | 2021-08-03 | Marvell Asia Pte, Ltd. | Methods and apparatus for providing an adaptive beamforming antenna for OFDM-based communication systems |
KR102320236B1 (ko) * | 2020-04-06 | 2021-11-02 | 주식회사 이노와이어리스 | 무선 연결을 통한 기지국 빔신호 추출 장치 |
Family Cites Families (48)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4121212A (en) * | 1975-11-21 | 1978-10-17 | Westinghouse Electric Corp. | Double sideband pulse radar |
US5510796A (en) * | 1984-12-31 | 1996-04-23 | Martin Marietta Corporation | Apparatus for wind shear compensation in an MTI radar system |
US4721960A (en) * | 1986-07-15 | 1988-01-26 | Canadian Marconi Company | Beam forming antenna system |
US4947176A (en) * | 1988-06-10 | 1990-08-07 | Mitsubishi Denki Kabushiki Kaisha | Multiple-beam antenna system |
US5276452A (en) * | 1992-06-24 | 1994-01-04 | Raytheon Company | Scan compensation for array antenna on a curved surface |
US6038459A (en) * | 1992-10-19 | 2000-03-14 | Nortel Networks Corporation | Base station antenna arrangement |
US6101399A (en) * | 1995-02-22 | 2000-08-08 | The Board Of Trustees Of The Leland Stanford Jr. University | Adaptive beam forming for transmitter operation in a wireless communication system |
US5650868A (en) * | 1995-06-07 | 1997-07-22 | Compaq Computer Corporation | Data transfer system |
JPH09191209A (ja) * | 1996-01-10 | 1997-07-22 | Nec Corp | ウェイト制御装置 |
US5987037A (en) * | 1996-02-26 | 1999-11-16 | Lucent Technologies Inc. | Multiple beam wireless telecommunication system |
DE19748604B4 (de) * | 1997-11-04 | 2009-08-27 | Robert Bosch Gmbh | Verfahren zur Bestimmung eines Seiten- und/oder eines Höhenwinkels bei einem mehrstrahligen Radarsystem sowie Vorrichtung zur Durchführung des Verfahrens |
US6014372A (en) | 1997-12-08 | 2000-01-11 | Lockheed Martin Corp. | Antenna beam congruency system for spacecraft cellular communications system |
US6377558B1 (en) * | 1998-04-06 | 2002-04-23 | Ericsson Inc. | Multi-signal transmit array with low intermodulation |
JP4087023B2 (ja) * | 1998-09-22 | 2008-05-14 | シャープ株式会社 | ミリ波帯信号送受信システムおよびミリ波帯信号送受信システムを具備した家屋 |
US6304214B1 (en) * | 1999-05-07 | 2001-10-16 | Lucent Technologies Inc. | Antenna array system having coherent and noncoherent reception characteristics |
WO2001035494A1 (en) * | 1999-11-05 | 2001-05-17 | Motorola, Inc. | Earth-fixed beams from a space vehicle |
US6665565B1 (en) * | 1999-12-24 | 2003-12-16 | Medtronic, Inc. | Method and a system for conducting failure mode recovery in an implanted medical device |
US7248841B2 (en) * | 2000-06-13 | 2007-07-24 | Agee Brian G | Method and apparatus for optimization of wireless multipoint electromagnetic communication networks |
KR20020010023A (ko) * | 2000-07-28 | 2002-02-02 | 윤종용 | 코드 분할 다중 접속 방식의 이동 통신 시스템에 적용하기위한 적응 빔포밍 방법 |
GB0020088D0 (en) * | 2000-08-15 | 2000-10-04 | Fujitsu Ltd | Adaptive beam forming |
DE10058060A1 (de) * | 2000-11-23 | 2002-05-29 | Siemens Ag | Verfahren und Vorrichtung zur Feedback-Übertragung in einem Funk-Kommunikationssystem |
CN1146171C (zh) * | 2000-11-24 | 2004-04-14 | 华为技术有限公司 | 大容量同步码分多址扩频通信系统的实现方法 |
KR100499472B1 (ko) * | 2000-12-06 | 2005-07-07 | 엘지전자 주식회사 | 순방향 링크에서의 적응 어레이를 이용한 빔포밍 시스템 |
KR100500538B1 (ko) * | 2000-12-22 | 2005-07-12 | 엘지전자 주식회사 | 다중 사용자 검출단을 이용한 적응 배열 안테나 시스템 및 이를 이용한 다중 사용자 검출 방법 |
JP3926561B2 (ja) * | 2000-12-28 | 2007-06-06 | 株式会社エヌ・ティ・ティ・ドコモ | 移動通信システム |
GB2371947B (en) * | 2001-02-01 | 2005-02-23 | Fujitsu Ltd | Communications systems |
GB0110125D0 (en) | 2001-04-25 | 2001-06-20 | Koninkl Philips Electronics Nv | Radio communication system |
JP2002325010A (ja) * | 2001-04-26 | 2002-11-08 | Nec Corp | Lanアンテナおよびその反射器 |
US8675772B2 (en) * | 2001-05-09 | 2014-03-18 | Alcatel Lucent | Method for multiple antenna transmission using partial channel knowledge |
US6690917B2 (en) | 2001-11-15 | 2004-02-10 | Qualcomm Incorporated | System and method for automatic determination of azimuthal and elevation direction of directional antennas and calibration thereof |
US20040004945A1 (en) * | 2001-10-22 | 2004-01-08 | Peter Monsen | Multiple access network and method for digital radio systems |
US7095987B2 (en) * | 2001-11-15 | 2006-08-22 | Texas Instruments Incorporated | Method and apparatus for received uplinked-signal based adaptive downlink diversity within a communication system |
US7304939B2 (en) * | 2001-12-03 | 2007-12-04 | Nortel Networks Limited | Communication using simultaneous orthogonal signals |
CN1172549C (zh) * | 2002-03-27 | 2004-10-20 | 大唐移动通信设备有限公司 | 智能天线移动通信系统传输高速下行包交换数据的方法 |
US6728517B2 (en) | 2002-04-22 | 2004-04-27 | Cognio, Inc. | Multiple-input multiple-output radio transceiver |
JP2004040168A (ja) * | 2002-06-28 | 2004-02-05 | Matsushita Electric Ind Co Ltd | 無線局方向推定・電波発射装置 |
US7236808B2 (en) | 2002-09-09 | 2007-06-26 | Interdigital Technology Corporation | Vertical dynamic beam-forming |
US7245939B2 (en) | 2002-09-09 | 2007-07-17 | Interdigital Technology Corporation | Reducing the effect of signal interference in null areas caused by overlapping antenna patterns |
TW200729983A (en) * | 2002-09-27 | 2007-08-01 | Interdigital Tech Corp | Mobile communications system and method for providing mobile unit handover in wireless communication systems that employ beamforming antennas |
US20040116146A1 (en) * | 2002-12-13 | 2004-06-17 | Sadowsky John S. | Cellular system with link diversity feedback |
US7656936B2 (en) * | 2003-01-28 | 2010-02-02 | Cisco Technology, Inc. | Method and system for interference reduction in a wireless communication network using a joint detector |
US6816106B1 (en) * | 2003-05-06 | 2004-11-09 | Walker Butler | Identification and location system for personnel and vehicles |
US7428228B2 (en) * | 2003-07-07 | 2008-09-23 | Samsung Electronics Co., Ltd | Method and apparatus for detecting active downlink channelization codes in a TD-CDMA mobile communication system |
US7257167B2 (en) * | 2003-08-19 | 2007-08-14 | The University Of Hong Kong | System and method for multi-access MIMO channels with feedback capacity constraint |
US7676007B1 (en) * | 2004-07-21 | 2010-03-09 | Jihoon Choi | System and method for interpolation based transmit beamforming for MIMO-OFDM with partial feedback |
US7289770B2 (en) * | 2004-09-28 | 2007-10-30 | Intel Corporation | Compact feedback for closed loop MIMO |
US6992622B1 (en) | 2004-10-15 | 2006-01-31 | Interdigital Technology Corporation | Wireless communication method and antenna system for determining direction of arrival information to form a three-dimensional beam used by a transceiver |
US7193574B2 (en) | 2004-10-18 | 2007-03-20 | Interdigital Technology Corporation | Antenna for controlling a beam direction both in azimuth and elevation |
-
2004
- 2004-12-16 US US11/014,290 patent/US7551680B2/en not_active Expired - Fee Related
-
2005
- 2005-09-13 KR KR1020077011200A patent/KR100902810B1/ko not_active IP Right Cessation
- 2005-09-13 CN CN2005800368205A patent/CN101375522B/zh not_active Expired - Fee Related
- 2005-09-13 KR KR1020077014436A patent/KR20070086632A/ko not_active Application Discontinuation
- 2005-09-13 WO PCT/US2005/032676 patent/WO2006049705A2/en active Application Filing
- 2005-09-13 EP EP05818816A patent/EP1805910A4/en not_active Withdrawn
- 2005-09-13 JP JP2007538911A patent/JP2008518554A/ja not_active Ceased
- 2005-09-13 MX MX2007005034A patent/MX2007005034A/es not_active Application Discontinuation
- 2005-09-13 CA CA002584316A patent/CA2584316A1/en not_active Abandoned
- 2005-09-14 TW TW102116436A patent/TW201347453A/zh unknown
- 2005-09-14 TW TW098100242A patent/TW200943779A/zh unknown
- 2005-09-14 TW TW095112741A patent/TW200709595A/zh unknown
- 2005-09-14 TW TW094131745A patent/TWI292261B/zh not_active IP Right Cessation
-
2007
- 2007-05-25 NO NO20072675A patent/NO20072675L/no not_active Application Discontinuation
-
2009
- 2009-06-05 US US12/479,260 patent/US20090245411A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
CN101375522B (zh) | 2011-08-31 |
TW201347453A (zh) | 2013-11-16 |
TW200943779A (en) | 2009-10-16 |
KR20070085388A (ko) | 2007-08-27 |
EP1805910A2 (en) | 2007-07-11 |
CN101375522A (zh) | 2009-02-25 |
NO20072675L (no) | 2007-07-27 |
US7551680B2 (en) | 2009-06-23 |
TWI292261B (en) | 2008-01-01 |
JP2008518554A (ja) | 2008-05-29 |
TW200618516A (en) | 2006-06-01 |
CA2584316A1 (en) | 2006-05-11 |
KR100902810B1 (ko) | 2009-06-12 |
MX2007005034A (es) | 2007-06-19 |
WO2006049705A2 (en) | 2006-05-11 |
US20060093055A1 (en) | 2006-05-04 |
EP1805910A4 (en) | 2008-04-02 |
WO2006049705A3 (en) | 2007-04-05 |
KR20070086632A (ko) | 2007-08-27 |
US20090245411A1 (en) | 2009-10-01 |
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