WO2005071865A1 - 送信指向性アンテナ制御システム、基地局及びそれらに用いる送信指向性アンテナ制御方法 - Google Patents
送信指向性アンテナ制御システム、基地局及びそれらに用いる送信指向性アンテナ制御方法 Download PDFInfo
- Publication number
- WO2005071865A1 WO2005071865A1 PCT/JP2005/000506 JP2005000506W WO2005071865A1 WO 2005071865 A1 WO2005071865 A1 WO 2005071865A1 JP 2005000506 W JP2005000506 W JP 2005000506W WO 2005071865 A1 WO2005071865 A1 WO 2005071865A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- transmission
- array antenna
- mobile station
- base station
- antenna elements
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
- H04W52/42—TPC being performed in particular situations in systems with time, space, frequency or polarisation diversity
-
- 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
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
-
- 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
Definitions
- the present invention relates to a transmission directional antenna control system, a base station, and a transmission directional antenna control method used therefor, and more particularly to a transmission directional antenna control method for transmitting downlink radio waves by a plurality of transmission array antenna elements used in a base station.
- a transmission directional antenna control method for transmitting downlink radio waves by a plurality of transmission array antenna elements used in a base station.
- CDMA Code Division Multiple Access
- the array antenna receives signals with multiple antennas and performs weighted synthesis of complex numbers to control the amplitude and phase of the received signal of each antenna to form a directional beam and suppress interference of other users.
- Fig. 1 shows a configuration example of a conventional transmission directivity control device (base station) using the multi-beam method.
- N is an integer equal to or greater than 2
- antenna elements 111 to 11N arranged close by a receiving array antenna unit 110
- a despreading unit is used.
- CDMA signals are despread by despreaders 121-12N for each of the 20 antennas.
- reception beam forming section 130 uses M (M is an integer of 2 or more) fixed beam beamformers 131-13M, and uses a weighting factor calculated in advance by a multiplier. , And by combining these, the phase and amplitude are controlled, and reception with a beam formed in a specific direction is realized.
- M fixed beams are specified Are arranged so as to cover the space area (eg, sector) as evenly as possible.
- the beam power detector 140 measures the power of each output of the beamformers 131-13M, and notifies the beam power selector / combiner 150 of the received power along with the beam number.
- the beam output selection / synthesis unit 150 selects a beam having a high level of received power from the received power and outputs it.
- a transmission weight generation unit previously selects a transmission weight in the same direction as the beam used in reception from among fixed beams forming beams arranged in the same direction as in uplink reception. Then, transmission is performed using a beam in the same direction as that obtained by uplink reception using transmission beamforming section 170.
- a downlink transmission beam is formed in the same direction as the beam direction obtained in uplink reception, and a signal is transmitted.
- FDD Frequency Division Duplex
- an object of the present invention is to solve the above-mentioned problems and to provide a transmission directional antenna control system, a base station, and a transmission used therefor, which can select a beam having a more optimal multi-beam transmission beam power.
- An object of the present invention is to provide a directional antenna control method.
- a transmission directional antenna control system is a transmission directional antenna control system in which a base station performs directivity control of a transmission array antenna element in accordance with information from a mobile station,
- Means for forming an arbitrary multi-beam other than the transmission multi-beam selected by the mobile station are provided.
- the base station according to the present invention provides a finger of a transmission array antenna element according to information from a mobile station.
- Means for forming an arbitrary multi-beam other than the transmission multi-beam selected by the mobile station are provided.
- a transmission directional antenna control method is a transmission directional antenna control method in which a base station performs directivity control of a transmission array antenna element according to information on mobile station power. Forming a transmission multi-beam corresponding to the spreading code selected by the mobile station based on the signals spread by different spreading codes transmitted from the transmission array antenna element; and Forming an arbitrary multi-beam other than the transmission multi-beam.
- the transmission directional antenna control system of the present invention converts a plurality of reception array antenna elements, a plurality of transmission array antenna elements, and each reception signal from the reception array antenna element to a predetermined weight coefficient.
- a transmission weighting factor generating means for generating a transmission weighting factor for transmission data in accordance with information received from the mobile station for each of transmission multibeams corresponding to a plurality of transmission array antenna elements, and a transmission weighting factor other than the generated multibeam.
- the transmission weighting factor generating means receives the signals spread by different spreading codes transmitted by the transmission array antenna element at the mobile station and compares the powers. When a signal with a high received power is selected and transmitted, a transmission multi-beam corresponding to the spreading code selected by the mobile station is formed. And means for forming an arbitrary multi-beam other than the transmission multi-beam selected by the mobile station.
- another transmission directional antenna control system of the present invention includes a plurality of reception array antenna elements, a plurality of transmission array antenna elements, and adaptively changing the direction of arrival of each reception signal from the reception array antenna element.
- Means for forming a reception beam by estimating and weighting the information means for receiving information on mobile station power using the formed reception beam, and a plurality of transmission weight coefficients for transmission data according to the information received from the mobile station.
- Transmission weight coefficient generation means for generating a transmission beam corresponding to the transmission array antenna element of the above, an arbitrary transmission weight coefficient generation means other than the generated transmission beam, and multiply the transmission data by these transmission weight coefficients.
- the base station has means for generating a transmit beam, spreading it with different spreading codes, and supplying it to the corresponding transmit array antenna element. It is carried out directivity control of the transmitting array antenna elements in accordance with the information.
- the above-mentioned transmission weighting factor generating means receives signals spread by different spreading codes transmitted by the transmitting array antenna element at the mobile station, respectively.
- a signal for SIR Signal to Interference power Ratio
- the mobile station measures the SIR and notifies the base station of a signal with a spread code with good reception characteristics, so that the base station transmits data with a beam corresponding to the spread code notified from the mobile station, thereby achieving higher quality. Quality transmission can be realized.
- an effect is obtained that an optimum beam can be selected from the medium power of a multi-beam transmission beam.
- FIG. 1 is a block diagram showing a configuration of a base station according to a conventional example.
- FIG. 2 is a block diagram showing a configuration of a base station according to one embodiment of the present invention.
- FIG. 3 is a block diagram showing a configuration example of a beam former of FIG. 1.
- FIG. 4 is a block diagram showing a configuration example of a transmission beam former of FIG. 1.
- FIG. 5 is a flowchart showing an operation on the base station side according to one embodiment of the present invention.
- FIG. 6 is a flowchart showing an operation on the mobile station side according to one embodiment of the present invention.
- FIG. 7 is a block diagram showing a configuration of a base station according to another embodiment of the present invention.
- FIG. 2 shows an embodiment of the present invention.
- FIG. 3 is a block diagram illustrating a configuration of a base station according to an example.
- a base station according to an embodiment of the present invention constitutes a transmission directional antenna control system together with a mobile station (not shown), and includes a reception array antenna unit 1, a despreading unit 2, and a reception beam forming unit. 3, a beam power detection unit 4, a beam output selection / synthesis unit 5, a transmission weight generation unit 6, a transmission beam forming unit 7, a spreading unit 8, and a transmission array antenna unit 9. .
- the receiving array antenna unit 1 is composed of N (N is an integer of 2 or more) array antenna elements 11-1N, and the despreading unit 2 has N despreaders 21-2N.
- the receiving beamforming unit 3 is composed of M (M is an integer of 2 or more) beamformers 31-3M.
- the transmission beam forming unit 7 includes two transmission beamformers 71 and 72, the spreading unit 8 includes two spreaders 81 and 82, and the transmission array antenna unit 9 includes N transmission array antenna elements. It is from 91 to 9N.
- FIG. 3 is a block diagram showing a configuration example of the beam former 31-3M in FIG.
- the beamformer 31-3M shown in FIG. 2 includes a multiplier 301 composed of multipliers 301-1-301-N shown in FIG.
- FIG. 4 is a block diagram showing a configuration example of the transmission beamformers 71 and 72 in FIG.
- Each of the transmission beamformers 71 and 72 shown in FIG. 2 includes a multiplier 401 composed of multipliers 401-1-401 -N shown in FIG.
- a transmission directional antenna control apparatus will be described with reference to Figs. 2 to 4.
- the signals received by the N array antenna elements 11-1N are despread by despreaders 21-2N corresponding to the respective elements.
- the despread signals are input to M beamformers 31-3M, respectively.
- the beamformer 31-3M performs weighting synthesis on the received signal with a weighting coefficient calculated in advance by a multiplier 301-1-301-N to generate M multi-beam outputs. Is done.
- the M beam outputs beamformed by the beamformer 31-3M are input to the beam power detection unit 4 and the beam output selection unit 5.
- the beam power detection unit 4 obtains the M received signal powers of the multi-beam, and outputs the result to the beam output selection unit 5 and the transmission weight generation unit 6.
- the beam output selection unit 5 selects a beam having the maximum power from among the M outputs of the beamformer 31-3M from the information on the reception power from the beam power detection unit 4, receives a signal, and receives the signal.
- the information thus output is output to an internal circuit (not shown) and the transmission weight generation unit 6.
- the transmission weight generation unit 6 prepares a transmission weight coefficient corresponding to the reception weight in advance, and based on the received information, a beam corresponding to the signal of the spreading code selected by the mobile station (not shown) and any other arbitrary signal. A beam is selected, and the transmission beamforming unit 7 is notified of each transmission weight coefficient.
- transmission weighting factors are weighted to transmission data corresponding to transmission array antenna elements 91-19N by multipliers 401-1-1401-N. And outputs the result to the diffusion unit 8.
- Spreaders 81 and 82 spread the input signals with different spreading codes, respectively, and output the spread signals to transmission array antenna elements 91-19N, which are transmitted as beamformed signals.
- FIG. 5 is a flowchart showing an operation on the base station side according to one embodiment of the present invention
- FIG. 6 is a flowchart showing an operation on the mobile station side according to one embodiment of the present invention.
- the operation of the transmission directional antenna control system according to one embodiment of the present invention will be described with reference to FIGS.
- the receiving array antenna section 1 of the base station has a plurality of array antenna elements 11-11N and receives a CDMA signal.
- the despreading section 2 has N despreaders 21-2N, and despreads the outputs of the array antenna elements 11-1N, respectively.
- the reception beamforming unit 3 has M beamformers 31-3M, receives the output of the despreading unit 2, performs beamforming with multiple beams, and forms M beam outputs.
- the beam power detector 4 receives the output of the beam former 31-3M and performs power measurement for each beam.
- the beam output selection unit 5 receives a signal from a beam output having a higher level from among beam outputs based on the power information of each beam from the beam power detection unit 4.
- the transmission weight generation unit 6 generates two different transmission weight coefficients based on the power information of each beam from the beam power detection unit 4 and the information of the reception signal from the beam output selection unit 5 to generate a beam.
- the beamforming unit 7 performs beamforming of the transmission signal from each of the two different transmission weight coefficients from the transmission weight generation unit 6, and notifies the spreading unit 8.
- Spreading section 8 spreads the two different beamformed signals with two different spreading codes for each of transmission array antenna elements 91 to 9N, outputs the spread signal to transmission array antenna section 9, and outputs the signals from transmission array antenna section 9. A signal is transmitted.
- the transmission weight generation unit 6 receives the output power of each reception multi-beam from the beam power detection unit 4, selects the one with the highest power, and selects the selected reception multi-beam. Select the transmission weight calculated in advance for the beam (step Sl in Fig. 5). Further, the transmission weight generation unit 6 selects an arbitrary multi-beam other than the selected multi-beam, and notifies the transmission beamformers 71 and 72 of the respective transmission weights.
- Transmission beamformers 71 and 72 perform beamforming on a transmission signal corresponding to a beam having the maximum power of the reception multibeam with respect to a pilot signal for reception SIR measurement and transmission data, and perform any other beam. Perform beamforming on only the pilot signal.
- the signals beamformed by the two transmission beamformers 71 and 72 are output to two different spreaders 81 and 82, respectively, and spread by two different spreading codes by the spreaders 81 and 82 to form a transmission array.
- the signal is transmitted from the antenna unit 9 to the mobile station (steps S2 and S3 in Fig. 5).
- the mobile station When the mobile station receives the pilot signals of two different spreading codes from the transmission array antenna unit 9 (step S11 in FIG. 6), it obtains the SIR of those signals and selects a code having good reception characteristics. Notify the base station (steps S12, S13 in Fig. 6).
- the base station When the base station receives the signal from the mobile station again (step S4 in FIG. 5), the base station performs despreading and beamforming on the signal, and receives the signal with the received multi-beam having the maximum power.
- transmission weight generating section 6 selects a multi-beam corresponding to the spreading code selected by the mobile station based on information from the mobile station. Also, the transmission weight generator 6 An arbitrary multi-beam other than the system is selected, and the transmission weights are notified to the transmission beamformers 71 and 72, respectively.
- Transmission beamformers 71 and 72 perform beamforming of pilot signals and transmission data on beams corresponding to codes notified from the mobile station and selected by the mobile station, and perform beamforming on other arbitrary beams. To perform beamforming using only pilot signals. These signals are spread by two different spreading codes by spreaders 81 and 82, and transmitted from transmission array antenna unit 9 to the mobile station (steps S5 and S6 in FIG. 5).
- the above processing operation is repeatedly performed in the base station while the base station and the mobile pole are communicating (steps S4-S7 in Fig. 5). Also, the above processing operation is repeatedly performed in the mobile station (steps S11 to S14 in FIG. 6), so that a more optimal downlink transmission beam can be selected.
- FIG. 7 is a block diagram showing a configuration of a base station according to another embodiment of the present invention.
- a base station according to another embodiment of the present invention constitutes a transmission directional antenna control system together with a mobile station (not shown) as in the above-described embodiment of the present invention, and a reception array.
- the beam forming method is further devised with respect to the above-described embodiment of the present invention.
- the reception beamforming unit 41 assumes that an algorithm that adaptively estimates the direction of arrival of the received signal and directs the beam [for example, MMSE (Minimum Mean Square Error)] is used.
- the detection unit 4 is a beam direction detection unit 42.
- the reception beam forming unit 41 receives a signal by forming a beam corresponding to the arrival direction of the reception signal.
- the received signal is input to the beam direction detection unit 42 and the transmission weight generation unit 6.
- the beam direction detection unit 42 detects the estimated arrival direction of the beam and notifies the transmission weight generation unit 6 of the detected direction.
- transmission weight generation section 6 receives the arrival direction from beam direction detection section 42, and calculates a transmission weight coefficient corresponding to the arrival direction. In addition, The transmission weight generator 6 calculates a beam indicating an arbitrary direction (for example, + 10 °) other than the calculated beam, and notifies the transmission beamformers 71 and 72 of the respective transmission weight coefficients.
- the transmission beamformers 71 and 72 perform beamforming on pilot signals and data for beams corresponding to the beams whose directions of arrival are estimated, and perform beamforming on only pilot signals for any other beams. Do. These two beamformed signals are input to two different spreaders 81 and 82, respectively, spread with two different spreading codes, and transmitted from the transmission array antenna unit 9 to the mobile station.
- the mobile station receives pilot signals of two different spreading codes, selects a code having good reception characteristics, and notifies the base station. Upon receiving the signal from the mobile station again, the base station performs despreading and beamforming in the same manner as described above, and receives the signal with a beam directed in the signal arrival direction.
- transmission weight generation section 6 selects a beam corresponding to the spreading code selected by the mobile station from the information on the mobile station power. Further, the transmission weight generation unit 6 calculates an arbitrary beam other than the selected beam, and notifies the transmission weight coefficients to the transmission beamformers 71 and 72, respectively.
- Transmission beamformers 71 and 72 perform beamforming on pilot signals and data for beams corresponding to the code (selected code) notified from the mobile station, and perform pilot signal generation on any other beam. Perform beamforming only. These signals are again spread with two different spreading codes and transmitted to the mobile station. In the present embodiment, by repeating this processing operation, a more optimal downlink transmission beam can be selected.
- transmission beamforming can be performed based on a more accurate beam.
- a more optimal beam can be selected from multi-beam transmission beams. It should be noted that the present invention is not limited to the above embodiments, and it is apparent that each embodiment can be appropriately changed within the technical idea of the present invention.
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
Description
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/586,589 US20080242243A1 (en) | 2004-01-21 | 2005-01-18 | Transmission Directional Antenna Control System, Base Station, And Transmission Directional Antenna Control Method Used For System And Base Station |
JP2005517234A JPWO2005071865A1 (ja) | 2004-01-21 | 2005-01-18 | 送信指向性アンテナ制御システム、基地局及びそれらに用いる送信指向性アンテナ制御方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-012545 | 2004-01-21 | ||
JP2004012545 | 2004-01-21 |
Publications (1)
Publication Number | Publication Date |
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WO2005071865A1 true WO2005071865A1 (ja) | 2005-08-04 |
Family
ID=34805349
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/000506 WO2005071865A1 (ja) | 2004-01-21 | 2005-01-18 | 送信指向性アンテナ制御システム、基地局及びそれらに用いる送信指向性アンテナ制御方法 |
Country Status (3)
Country | Link |
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US (1) | US20080242243A1 (ja) |
JP (1) | JPWO2005071865A1 (ja) |
WO (1) | WO2005071865A1 (ja) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
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US8750811B2 (en) * | 2007-03-14 | 2014-06-10 | Google Inc. | Method, apparatus and system for phase difference adjustment in transmit diversity |
US9374791B2 (en) | 2007-09-21 | 2016-06-21 | Qualcomm Incorporated | Interference management utilizing power and attenuation profiles |
US9066306B2 (en) | 2007-09-21 | 2015-06-23 | Qualcomm Incorporated | Interference management utilizing power control |
US20090080499A1 (en) * | 2007-09-21 | 2009-03-26 | Qualcomm Incorporated | Interference management employing fractional code reuse |
US9078269B2 (en) | 2007-09-21 | 2015-07-07 | Qualcomm Incorporated | Interference management utilizing HARQ interlaces |
US8824979B2 (en) * | 2007-09-21 | 2014-09-02 | Qualcomm Incorporated | Interference management employing fractional frequency reuse |
US9137806B2 (en) | 2007-09-21 | 2015-09-15 | Qualcomm Incorporated | Interference management employing fractional time reuse |
US9072102B2 (en) | 2007-11-27 | 2015-06-30 | Qualcomm Incorporated | Interference management in a wireless communication system using adaptive path loss adjustment |
US8948095B2 (en) | 2007-11-27 | 2015-02-03 | Qualcomm Incorporated | Interference management in a wireless communication system using frequency selective transmission |
US8422961B2 (en) * | 2009-02-23 | 2013-04-16 | Nokia Corporation | Beamforming training for functionally-limited apparatuses |
US9065584B2 (en) | 2010-09-29 | 2015-06-23 | Qualcomm Incorporated | Method and apparatus for adjusting rise-over-thermal threshold |
CN102938662B (zh) | 2011-08-15 | 2015-09-16 | 上海贝尔股份有限公司 | 用于3d天线配置的码本设计方法 |
CN103716081B (zh) * | 2013-12-20 | 2019-08-06 | 中兴通讯股份有限公司 | 下行波束确定方法、装置及系统 |
EP2924708A1 (en) * | 2014-03-25 | 2015-09-30 | Fei Company | Imaging a sample with multiple beams and multiple detectors |
TWI728416B (zh) * | 2019-04-12 | 2021-05-21 | 正文科技股份有限公司 | 天線控制方法及通訊系統控制方法 |
BR112022011448A2 (pt) * | 2019-12-12 | 2022-08-30 | Viasat Inc | Sistema, método e aparelho para comunicações por satélite |
US20230093484A1 (en) * | 2021-09-23 | 2023-03-23 | Apple Inc. | Systems and methods for de-correlating coded signals in dual port transmissions |
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JP3798549B2 (ja) * | 1998-03-18 | 2006-07-19 | 富士通株式会社 | 無線基地局のマルチビームアンテナシステム |
JP3641961B2 (ja) * | 1999-02-01 | 2005-04-27 | 株式会社日立製作所 | アダプティブアレイアンテナを使用した無線通信装置 |
SG80071A1 (en) * | 1999-09-24 | 2001-04-17 | Univ Singapore | Downlink beamforming method |
SG96568A1 (en) * | 2000-09-21 | 2003-06-16 | Univ Singapore | Beam synthesis method for downlink beamforming in fdd wireless communication system. |
JP3593969B2 (ja) * | 2000-10-25 | 2004-11-24 | 日本電気株式会社 | 送信アンテナ指向性制御装置及びその方法 |
CN100446612C (zh) * | 2001-05-04 | 2008-12-24 | 诺基亚公司 | 借助定向天线的许可控制 |
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JP3888189B2 (ja) * | 2002-03-12 | 2007-02-28 | 松下電器産業株式会社 | 適応アンテナ基地局装置 |
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2005
- 2005-01-18 JP JP2005517234A patent/JPWO2005071865A1/ja not_active Withdrawn
- 2005-01-18 WO PCT/JP2005/000506 patent/WO2005071865A1/ja active Application Filing
- 2005-01-18 US US10/586,589 patent/US20080242243A1/en not_active Abandoned
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JP2003124854A (ja) * | 2001-10-17 | 2003-04-25 | Matsushita Electric Ind Co Ltd | 無線通信装置及び無線通信方法 |
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Publication number | Publication date |
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US20080242243A1 (en) | 2008-10-02 |
JPWO2005071865A1 (ja) | 2007-12-27 |
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