JP2010523065A - 有効な同一チャネル干渉抑制によるチャネル推定 - Google Patents
有効な同一チャネル干渉抑制によるチャネル推定 Download PDFInfo
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- JP2010523065A JP2010523065A JP2010501226A JP2010501226A JP2010523065A JP 2010523065 A JP2010523065 A JP 2010523065A JP 2010501226 A JP2010501226 A JP 2010501226A JP 2010501226 A JP2010501226 A JP 2010501226A JP 2010523065 A JP2010523065 A JP 2010523065A
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- channel estimation
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- 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
- H04B1/7097—Interference-related aspects
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0023—Interference mitigation or co-ordination
- H04J11/005—Interference mitigation or co-ordination of intercell interference
- H04J11/0056—Inter-base station aspects
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
- H04L25/0226—Channel estimation using sounding signals sounding signals per se
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/022—Channel estimation of frequency response
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
共通パイロットチャネル(CPICH)、
同期チャネル(SCH)、
共通制御チャネル(CCCH)、
共有DL制御チャネル(SDCCH)、
マルチキャスト制御チャネル(MCCH)、
共有UL割当てチャネル(SUACH)、
肯定応答チャネル(ACKCH)、
DL物理共有データチャネル(DL−PSDCH)、
UL電力制御チャネル(UPCCH)、
ページングインジケータチャネル(PICH)、
負荷インジケータチャネル(LICH)を含む。
物理ランダムアクセスチャネル(PRACH)、
チャネル品質インジケータチャネル(CQICH)、
肯定応答チャネル(ACKCH)、
アンテナサブセットインジケータチャネル(ASICH)、
共有リクエストチャネル(SREQCH)、
UL物理共有データチャネル(UL−PSDCH)、
広帯域パイロットチャネル(BPICH)を含む。
Claims (29)
- パイロット信号のセットを時間領域に変換すること;
前記パイロット信号のサブセットについての同一チャネル干渉を抑制すること;及び
前記パイロット信号の少なくともいずれかに従って周波数領域におけるチャネル推定を行うこと、を含む無線通信システムのための方法。 - 前記パイロット信号は、複数の基地局又は単一基地局の複数のセクタに関連付けられる請求項1の方法。
- 前記パイロット信号及び関連データを生成するために前記基地局又は単一基地局のセクタからの受信信号を変換することをさらに含む請求項2の方法。
- 前記受信信号の変換は、時間領域から周波数領域への変換である請求項3の方法。
- 前記パイロット信号を分離するために前記関連データをヌリングすることをさらに含む請求項3の方法。
- 前記周波数領域から前記時間領域に前記パイロット信号を変換することをさらに含む請求項5の方法。
- いずれかの基地局又はセクタからのパイロット信号データを解析すること及び他のすべての基地局又はセクタからのパイロット信号データをヌリングすることをさらに含む請求項6の方法。
- 前記解析されたパイロット信号により時間領域チャネル推定を行うことをさらに含む請求項7の方法。
- 前記解析されたパイロット信号を前記時間領域から前記周波数領域に変換することをさらに含む請求項8の方法。
- 前記解析されたパイロット信号により周波数領域チャネル推定を行うことをさらに含む請求項9の方法。
- 前記パイロット信号のセットは3つの基地局に関連付けられる請求項1の方法。
- 前記パイロット信号のセットは単一基地局の3つのセクタに関連付けられる請求項1の方法。
- トーン抽出又は逆離散フーリエ変換を行うことをさらに含む請求項1の方法。
- 離散フーリエ変換、ゼロパディング操作又は時間領域補間フィルタ処理を行うことをさらに含む請求項1の方法。
- 変換されたデータについてヌルオペレーションを行うための命令を保持するメモリ及び前記命令を実行するプロセッサを具備し、前記ヌルオペレーションは、基地局又はセクタのセットに関連するデータをゼロ化し、前記命令は、それに続き、干渉しているパイロットトーンをヌリングする変換を行う通信装置。
- 時間領域チャネル推定及び周波数領域チャネル推定を行うことをさらに具備する請求項15の通信装置。
- チャネル推定を促進するトーン抽出回路をさらに具備する請求項15の通信装置。
- チャネル推定を促進するゼロパディング回路をさらに具備する請求項15の通信装置。
- チャネル推定を促進する時間領域補間フィルタをさらに具備する請求項15の通信装置。
- チャネル推定を促進する閾値化コンポーネントをさらに具備する請求項15の通信装置。
- 受信機パイロット信号を時間領域に変換するための手段;
同一チャネル干渉を抑制するための手段;及び
さらなる周波数領域処理のためにチャネル推定を周波数領域に変換するための手段を具備する通信装置。 - 直交する基地局又はセクタに関連するデータチャネルをヌリングするためのコード;
少なくとも2つの基地局又はセクタに関連するパイロットトーンをヌリングするためのコード;及び
少なくともいずれかの他の基地局から生成されたパイロットトーンからチャネル推定を行うためのコードを具備するコンピュータ可読媒体。 - 時間領域チャネル推定及び周波数領域チャネル推定を行うことをさらに具備する請求項22のコンピュータ可読媒体。
- 少なくとも2つの基地局又はセクタに関連するデータについてヌルオペレーションを行うために入力データを周波数領域に変換することをさらに具備する請求項22のコンピュータ可読媒体。
- 3つの基地局又はセクタのセットから、少なくとも2つの基地局又はセクタに関連するデータのセットをヌリングする命令;及び
同一チャネル干渉を軽減し前記パイロット信号の少なくともいずれかに従ってチャネル推定を行うために前記基地局又はセクタに関連するパイロット信号のサブセットをヌリングする命令を実行するプロセッサ。 - 前記パイロット信号及び関連データを生成するために前記基地局又は単一基地局のセクタからの受信信号を変換するための命令をさらに含む請求項25のプロセッサ。
- 前記受信信号の変換は、時間領域から周波数領域への変換である請求項26のプロセッサ。
- 前記周波数領域から前記時間領域に前記パイロット信号を変換するための命令をさらに含む請求項26のプロセッサ。
- いずれかの基地局又はセクタからのパイロット信号データを解析するための命令及び他のすべての基地局又はセクタからのパイロット信号データをヌリングするための命令をさらに含む請求項28のプロセッサ。
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US90839907P | 2007-03-27 | 2007-03-27 | |
US60/908,399 | 2007-03-27 | ||
US12/055,745 US8787499B2 (en) | 2007-03-27 | 2008-03-26 | Channel estimation with effective co-channel interference suppression |
US12/055,745 | 2008-03-26 | ||
PCT/US2008/058509 WO2008119052A2 (en) | 2007-03-27 | 2008-03-27 | Channel estimation with effective co-channel interference suppression |
Publications (2)
Publication Number | Publication Date |
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JP2010523065A true JP2010523065A (ja) | 2010-07-08 |
JP5204210B2 JP5204210B2 (ja) | 2013-06-05 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2010501226A Expired - Fee Related JP5204210B2 (ja) | 2007-03-27 | 2008-03-27 | 有効な同一チャネル干渉抑制によるチャネル推定 |
Country Status (9)
Country | Link |
---|---|
US (1) | US8787499B2 (ja) |
EP (1) | EP2127282A2 (ja) |
JP (1) | JP5204210B2 (ja) |
KR (1) | KR101109939B1 (ja) |
BR (1) | BRPI0809099A2 (ja) |
CA (1) | CA2679829A1 (ja) |
RU (1) | RU2475981C2 (ja) |
TW (1) | TWI365649B (ja) |
WO (1) | WO2008119052A2 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014195146A (ja) * | 2013-03-28 | 2014-10-09 | Fujitsu Ltd | 受信機および信号処理方法 |
Families Citing this family (40)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080159448A1 (en) * | 2006-12-29 | 2008-07-03 | Texas Instruments, Incorporated | System and method for crosstalk cancellation |
KR101466943B1 (ko) | 2008-04-04 | 2014-12-02 | 삼성전자주식회사 | 주파수 영역 등화를 위한 송신기 및 수신기 |
US8064857B2 (en) * | 2008-12-15 | 2011-11-22 | Panasonic Automotive Systems Company Of America, Division Of Panasonic Corporation Of North America | Method and apparatus for co-channel interference detection in a radio |
US20100220651A1 (en) * | 2009-03-02 | 2010-09-02 | Mediatek Inc. | Method and apparatus for broadcasting and receiving system information in OFDMA systems |
EP2264961A1 (en) * | 2009-06-19 | 2010-12-22 | ST-NXP Wireless France | Process for estimating the channel from the PSS signal in a LTE communication network, and receiver for the same |
TWI474628B (zh) * | 2009-06-30 | 2015-02-21 | Hon Hai Prec Ind Co Ltd | 多載波干擾消除電路及使用其的訊號收發系統 |
US20110143672A1 (en) * | 2009-12-14 | 2011-06-16 | Qualcomm Incorporated | Method and systems for parallel channel estimation and interference cancellation |
US8559567B1 (en) * | 2010-02-05 | 2013-10-15 | Marvell International Ltd. | Channel estimation using reduced-complexity cascaded one-dimensional filtering |
US8929393B2 (en) | 2010-05-03 | 2015-01-06 | Qualcomm Incorporated | Method and apparatus for communication with shortened signal formats |
US8737499B2 (en) * | 2011-10-17 | 2014-05-27 | Qualcomm Incorporated | Advanced interference cancellation for precoded GSM edge radio access network (GERAN) |
EP2777190B1 (en) * | 2011-11-08 | 2017-10-11 | Marvell World Trade Ltd. | Methods and apparatus for mitigating known interference |
US8767862B2 (en) | 2012-05-29 | 2014-07-01 | Magnolia Broadband Inc. | Beamformer phase optimization for a multi-layer MIMO system augmented by radio distribution network |
US8885757B2 (en) | 2012-05-29 | 2014-11-11 | Magnolia Broadband Inc. | Calibration of MIMO systems with radio distribution networks |
US8649458B2 (en) | 2012-05-29 | 2014-02-11 | Magnolia Broadband Inc. | Using antenna pooling to enhance a MIMO receiver augmented by RF beamforming |
US8971452B2 (en) | 2012-05-29 | 2015-03-03 | Magnolia Broadband Inc. | Using 3G/4G baseband signals for tuning beamformers in hybrid MIMO RDN systems |
US8644413B2 (en) | 2012-05-29 | 2014-02-04 | Magnolia Broadband Inc. | Implementing blind tuning in hybrid MIMO RF beamforming systems |
US9154204B2 (en) | 2012-06-11 | 2015-10-06 | Magnolia Broadband Inc. | Implementing transmit RDN architectures in uplink MIMO systems |
US8797969B1 (en) | 2013-02-08 | 2014-08-05 | Magnolia Broadband Inc. | Implementing multi user multiple input multiple output (MU MIMO) base station using single-user (SU) MIMO co-located base stations |
US9343808B2 (en) | 2013-02-08 | 2016-05-17 | Magnotod Llc | Multi-beam MIMO time division duplex base station using subset of radios |
US8989103B2 (en) | 2013-02-13 | 2015-03-24 | Magnolia Broadband Inc. | Method and system for selective attenuation of preamble reception in co-located WI FI access points |
US20140226740A1 (en) | 2013-02-13 | 2014-08-14 | Magnolia Broadband Inc. | Multi-beam co-channel wi-fi access point |
US9155110B2 (en) | 2013-03-27 | 2015-10-06 | Magnolia Broadband Inc. | System and method for co-located and co-channel Wi-Fi access points |
US9191991B2 (en) * | 2013-02-27 | 2015-11-17 | Blackberry Limited | Methods and apparatus for reducing the impact of RF interference based on estimation of colored noise |
US9100968B2 (en) | 2013-05-09 | 2015-08-04 | Magnolia Broadband Inc. | Method and system for digital cancellation scheme with multi-beam |
US9425882B2 (en) | 2013-06-28 | 2016-08-23 | Magnolia Broadband Inc. | Wi-Fi radio distribution network stations and method of operating Wi-Fi RDN stations |
US8995416B2 (en) * | 2013-07-10 | 2015-03-31 | Magnolia Broadband Inc. | System and method for simultaneous co-channel access of neighboring access points |
US9497781B2 (en) | 2013-08-13 | 2016-11-15 | Magnolia Broadband Inc. | System and method for co-located and co-channel Wi-Fi access points |
US9088898B2 (en) | 2013-09-12 | 2015-07-21 | Magnolia Broadband Inc. | System and method for cooperative scheduling for co-located access points |
US9060362B2 (en) * | 2013-09-12 | 2015-06-16 | Magnolia Broadband Inc. | Method and system for accessing an occupied Wi-Fi channel by a client using a nulling scheme |
US9172454B2 (en) | 2013-11-01 | 2015-10-27 | Magnolia Broadband Inc. | Method and system for calibrating a transceiver array |
US8891598B1 (en) | 2013-11-19 | 2014-11-18 | Magnolia Broadband Inc. | Transmitter and receiver calibration for obtaining the channel reciprocity for time division duplex MIMO systems |
US8942134B1 (en) | 2013-11-20 | 2015-01-27 | Magnolia Broadband Inc. | System and method for selective registration in a multi-beam system |
US8929322B1 (en) | 2013-11-20 | 2015-01-06 | Magnolia Broadband Inc. | System and method for side lobe suppression using controlled signal cancellation |
US9294177B2 (en) | 2013-11-26 | 2016-03-22 | Magnolia Broadband Inc. | System and method for transmit and receive antenna patterns calibration for time division duplex (TDD) systems |
US9014066B1 (en) | 2013-11-26 | 2015-04-21 | Magnolia Broadband Inc. | System and method for transmit and receive antenna patterns calibration for time division duplex (TDD) systems |
US9042276B1 (en) | 2013-12-05 | 2015-05-26 | Magnolia Broadband Inc. | Multiple co-located multi-user-MIMO access points |
US9172446B2 (en) | 2014-03-19 | 2015-10-27 | Magnolia Broadband Inc. | Method and system for supporting sparse explicit sounding by implicit data |
US9100154B1 (en) | 2014-03-19 | 2015-08-04 | Magnolia Broadband Inc. | Method and system for explicit AP-to-AP sounding in an 802.11 network |
US9271176B2 (en) | 2014-03-28 | 2016-02-23 | Magnolia Broadband Inc. | System and method for backhaul based sounding feedback |
TWI575901B (zh) * | 2015-06-17 | 2017-03-21 | 晨星半導體股份有限公司 | 通道效應消除裝置及通道效應消除方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0575568A (ja) * | 1991-01-17 | 1993-03-26 | Fr Telecom | 通信路の周波数応答の評価と限界判定を備えた時間周波数領域に多重化されたデイジタルデータをコヒレント復調するための装置 |
JP2005130485A (ja) * | 2003-10-01 | 2005-05-19 | Matsushita Electric Ind Co Ltd | Ofdm信号受信装置及びofdm信号受信方法 |
WO2006075732A1 (ja) * | 2005-01-17 | 2006-07-20 | Sharp Kabushiki Kaisha | 無線通信装置 |
WO2006138206A1 (en) * | 2005-06-16 | 2006-12-28 | Qualcomm Incorporated | Pilot and data transmission in a mimo system applying subband multiplexing |
US20070008873A1 (en) * | 2005-06-27 | 2007-01-11 | Alvarion Ltd. | Method and apparatus for improving reception in wireless networks subjected to neighboring cells' interferences |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6654429B1 (en) * | 1998-12-31 | 2003-11-25 | At&T Corp. | Pilot-aided channel estimation for OFDM in wireless systems |
US6765969B1 (en) * | 1999-09-01 | 2004-07-20 | Motorola, Inc. | Method and device for multi-user channel estimation |
US6362781B1 (en) * | 2000-06-30 | 2002-03-26 | Motorola, Inc. | Method and device for adaptive antenna combining weights |
US6804223B2 (en) * | 2000-11-30 | 2004-10-12 | Ipr Licensing, Inc. | Reverse link pilot integrated with block codes |
US7145959B2 (en) * | 2001-04-25 | 2006-12-05 | Magnolia Broadband Inc. | Smart antenna based spectrum multiplexing using existing pilot signals for orthogonal frequency division multiplexing (OFDM) modulations |
FR2827098B1 (fr) * | 2001-07-05 | 2003-12-05 | Nortel Networks Ltd | Procede de controle de ressources radio affectees a une communication entre un terminal mobile et une infrastructure cellulaire a etalement de spectre, et equipements pour la mise en oeuvre du procede |
RU2351071C2 (ru) * | 2002-10-25 | 2009-03-27 | Квэлкомм Инкорпорейтед | Оценка канала и пространственная обработка для tdd mimo систем |
US7151809B2 (en) * | 2002-10-25 | 2006-12-19 | Qualcomm, Incorporated | Channel estimation and spatial processing for TDD MIMO systems |
JP4470377B2 (ja) * | 2003-02-28 | 2010-06-02 | 株式会社日立製作所 | 移動通信システムにおける伝搬路推定方法 |
EP1521413A3 (en) * | 2003-10-01 | 2009-09-30 | Panasonic Corporation | Multicarrier reception with channel estimation and equalisation |
US7551545B2 (en) * | 2004-02-09 | 2009-06-23 | Qualcomm Incorporated | Subband-based demodulation for an OFDM-based communication system |
CN100359959C (zh) * | 2004-06-01 | 2008-01-02 | 华为技术有限公司 | 一种在正交多路频分复用系统中实现信道估计的方法 |
JP4396423B2 (ja) * | 2004-07-05 | 2010-01-13 | パナソニック株式会社 | Ofdm受信装置 |
US7672383B2 (en) * | 2004-09-17 | 2010-03-02 | Qualcomm Incorporated | Noise variance estimation in wireless communications for diversity combining and log-likelihood scaling |
KR100941901B1 (ko) | 2005-03-01 | 2010-02-16 | 퀄컴 인코포레이티드 | 다중 송신 모드용 채널 추정 최적화 |
US20060198454A1 (en) * | 2005-03-02 | 2006-09-07 | Qualcomm Incorporated | Adaptive channel estimation thresholds in a layered modulation system |
KR100865469B1 (ko) * | 2005-03-08 | 2008-10-27 | 삼성전자주식회사 | 공간 분할 다중 접속 방식을 지원하는 직교주파수 다중 분할 방식 시스템에서 채널 추정 장치 및 방법 |
US8229008B2 (en) | 2005-07-26 | 2012-07-24 | Nvidia Corporation | Interference mitigation for orthogonal frequency division multiplexing communication |
-
2008
- 2008-03-26 US US12/055,745 patent/US8787499B2/en not_active Expired - Fee Related
- 2008-03-27 RU RU2009139654/07A patent/RU2475981C2/ru not_active IP Right Cessation
- 2008-03-27 BR BRPI0809099-8A patent/BRPI0809099A2/pt not_active IP Right Cessation
- 2008-03-27 JP JP2010501226A patent/JP5204210B2/ja not_active Expired - Fee Related
- 2008-03-27 WO PCT/US2008/058509 patent/WO2008119052A2/en active Application Filing
- 2008-03-27 KR KR1020097022452A patent/KR101109939B1/ko not_active IP Right Cessation
- 2008-03-27 TW TW097111087A patent/TWI365649B/zh not_active IP Right Cessation
- 2008-03-27 EP EP08732961A patent/EP2127282A2/en not_active Withdrawn
- 2008-03-27 CA CA002679829A patent/CA2679829A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0575568A (ja) * | 1991-01-17 | 1993-03-26 | Fr Telecom | 通信路の周波数応答の評価と限界判定を備えた時間周波数領域に多重化されたデイジタルデータをコヒレント復調するための装置 |
JP2005130485A (ja) * | 2003-10-01 | 2005-05-19 | Matsushita Electric Ind Co Ltd | Ofdm信号受信装置及びofdm信号受信方法 |
WO2006075732A1 (ja) * | 2005-01-17 | 2006-07-20 | Sharp Kabushiki Kaisha | 無線通信装置 |
WO2006138206A1 (en) * | 2005-06-16 | 2006-12-28 | Qualcomm Incorporated | Pilot and data transmission in a mimo system applying subband multiplexing |
US20070008873A1 (en) * | 2005-06-27 | 2007-01-11 | Alvarion Ltd. | Method and apparatus for improving reception in wireless networks subjected to neighboring cells' interferences |
Non-Patent Citations (2)
Title |
---|
JPN6012000708; 高岡 辰輔 外1名: 'OFDM移動通信における適応補間フィルタを用いるチャネル推定' 電子情報通信学会技術研究報告 Vol.103, No.456, 20031113, pp.51-56 * |
JPN6012006876; Junghoon Lee et al.: 'Performance Improvement of Channel Estimation based on Pilot Structure Variations for Cellular OFDMA' Vehicular Technology Conference, 2004. VTC2004-Fall. Vol.2, 20040929, pp.989-993 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014195146A (ja) * | 2013-03-28 | 2014-10-09 | Fujitsu Ltd | 受信機および信号処理方法 |
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WO2008119052A2 (en) | 2008-10-02 |
US8787499B2 (en) | 2014-07-22 |
TWI365649B (en) | 2012-06-01 |
KR101109939B1 (ko) | 2012-02-15 |
TW200913589A (en) | 2009-03-16 |
JP5204210B2 (ja) | 2013-06-05 |
BRPI0809099A2 (pt) | 2014-09-09 |
CA2679829A1 (en) | 2008-10-02 |
US20080240314A1 (en) | 2008-10-02 |
WO2008119052A3 (en) | 2009-03-05 |
KR20090125208A (ko) | 2009-12-03 |
RU2009139654A (ru) | 2011-05-10 |
RU2475981C2 (ru) | 2013-02-20 |
EP2127282A2 (en) | 2009-12-02 |
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