JP4697935B2 - Umts基地局のための前置等化 - Google Patents
Umts基地局のための前置等化 Download PDFInfo
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- JP4697935B2 JP4697935B2 JP2004544494A JP2004544494A JP4697935B2 JP 4697935 B2 JP4697935 B2 JP 4697935B2 JP 2004544494 A JP2004544494 A JP 2004544494A JP 2004544494 A JP2004544494 A JP 2004544494A JP 4697935 B2 JP4697935 B2 JP 4697935B2
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- filter
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- equalizer
- filtering
- base station
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- 230000004044 response Effects 0.000 claims abstract description 39
- 238000001914 filtration Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims description 24
- 238000004891 communication Methods 0.000 claims description 5
- 238000012937 correction Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 230000006872 improvement Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000013139 quantization Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000000411 transmission spectrum Methods 0.000 description 1
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Classifications
-
- 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
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03343—Arrangements at the transmitter end
-
- 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
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L2025/0335—Arrangements for removing intersymbol interference characterised by the type of transmission
- H04L2025/03375—Passband transmission
- H04L2025/03401—PSK
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transmitters (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Mobile Radio Communication Systems (AREA)
- Filters And Equalizers (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Description
本発明は、RF(無線周波数)フィルタリングに関し、より詳細には、無線通信アプリケーションにおけるRFフィルタリング(排他的ではないが)に関する。
[発明の背景]
3GPP(3rd Generation Partnership Project)による仕様(3GPP TS 25.105 v3.10.0「BS Radio Transmission and Reception(TDD)」、以降において[1]として参照)は、TDD(時分割多重化)ノードB(3GPPシステム)装置のパフォーマンスを設定する。上記仕様は、隣接チャネルにおいて動作する他のTDDまたはFDD(周波数分割多重化)ノードBと併存される装置に対し指定されるノードBの「隣接チャネル漏洩電力比(ACLR)」をカバーしている。
[発明の概要]
本発明の第1の特徴によると、請求項1記載の基地局が提供される。
・TDD基地局とFDD基地局との間で共有される1つのアンテナ
・TDD基地局間で共有される1つのアンテナ
・各基地局が各自のアンテナを有するが、同一セル位置では同一タワーを占有する複数の基地局アンテナ
をカバーするということは理解されるであろう。
・非線形位相に等しい一定でないグループ遅延対周波数応答;グループ遅延の変動は、妥当な個数のセクションを用いた大変急峻な移行領域を有するフィルタの設計の結果である。
・信号通過域における早いロールオフ;フィルタ設計及び実際的な実現の結果、すなわち、有限のQの結果
各要因は、個別に考慮することが可能である。
Claims (12)
- 送信対象の直交デジタル信号(I,Q)を受信する手段を有する送信機構成を有する基地局であって、
前記受信した直交デジタル信号をフィルタリングするよう構成されるデジタルプレイコライザフィルタ部であって、アナログチャネルフィルタのインパルス応答の時間反転されたものを提供し、前記アナログチャネルフィルタにおける非線形位相応答を訂正するための複素係数を前記受信したデジタル信号に適用するよう構成される第1デジタルフィルタを有するデジタルプレイコライザフィルタ部と、
前記訂正された直交デジタル信号をアナログ信号に変換するよう構成されるDAC部と、
を有し、
前記アナログチャネルフィルタは、送信用の前記アナログ信号をフィルタリングするよう構成され、
前記デジタルプレイコライザフィルタ部はさらに、非対称振幅等化を提供するため、前記受信したデジタル信号に複素係数を適用するよう構成される第2デジタルフィルタを有する基地局。 - 前記デジタルプレイコライザフィルタ部は、有限インパルス応答(FIR)フィルタを有する、請求項1記載の基地局。
- 前記デジタルプレイコライザフィルタ部は、前記アナログチャネルフィルタの中心周波数を所望値に調整するよう構成される、請求項1又は2記載の基地局。
- 前記デジタルプレイコライザフィルタ部はさらに、前記アナログチャネルフィルタにおける振幅エラー応答を訂正するよう構成される、請求項1乃至3何れか一項記載の基地局。
- 前記デジタルプレイコライザフィルタ部は、プログラム可能である、請求項1乃至4何れか一項記載の基地局。
- 当該基地局は、TDD無線通信システムにおいて使用するため構成される、請求項1乃至5何れか一項記載の基地局。
- 無線通信基地局の送信機におけるフィルタリングのための方法であって、
送信対象の直交デジタル信号(I,Q)を受信するステップと、
アナログチャネルフィルタのインパルス応答の時間反転されたものを提供し、前記アナログチャネルフィルタにおける非線形位相応答を訂正するための独立した複素係数を前記受信した直交デジタル信号に適用することによって、デジタルプレイコライザが前記直交デジタル信号をフィルタリングするステップと、
前記訂正された直交デジタル信号をアナログ信号に変換するステップと、
前記アナログチャネルフィルタにより前記アナログ信号をフィルタリングするステップと、
を有し、
前記デジタルプレイコライザがフィルタリングするステップは、非対称振幅等化を提供するため、前記受信したデジタル信号に複素係数をさらに適用する方法。 - 前記デジタルプレイコライザがフィルタリングするステップは、有限インパルス応答(FIR)フィルタを用いたフィルタリングから構成される、請求項7記載の方法。
- 前記デジタルプレイコライザがフィルタリングするステップは、前記アナログチャネルフィルタの中心周波数を所望値に調整することを含む、請求項7又は8記載の方法。
- 前記デジタルプレイコライザがフィルタリングするステップは、デジタルプレイコライザフィルタをプログラムすることを含む、請求項7乃至9何れか一項記載の方法。
- 前記デジタルプレイコライザがフィルタリングするステップはさらに、前記アナログチャネルフィルタにおける振幅エラー応答を訂正することを含む、請求項7乃至10何れか一項記載の方法。
- 当該方法は、UMTS無線通信システムのノードB装置において実行される、請求項7乃至11何れか一項記載の方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0224297A GB2394390B (en) | 2002-10-18 | 2002-10-18 | Arrangement and method for RF filter |
GB0224297.2 | 2002-10-18 | ||
PCT/GB2003/004506 WO2004036857A1 (en) | 2002-10-18 | 2003-10-20 | Pre-equalistion for umts base station |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2007527630A JP2007527630A (ja) | 2007-09-27 |
JP4697935B2 true JP4697935B2 (ja) | 2011-06-08 |
Family
ID=9946163
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004544494A Expired - Lifetime JP4697935B2 (ja) | 2002-10-18 | 2003-10-20 | Umts基地局のための前置等化 |
Country Status (9)
Country | Link |
---|---|
US (2) | US7738593B2 (ja) |
EP (1) | EP1557018B1 (ja) |
JP (1) | JP4697935B2 (ja) |
AT (1) | ATE495615T1 (ja) |
AU (1) | AU2003271974A1 (ja) |
DE (1) | DE60335729D1 (ja) |
ES (1) | ES2362393T3 (ja) |
GB (1) | GB2394390B (ja) |
WO (1) | WO2004036857A1 (ja) |
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US7936851B2 (en) * | 2004-02-20 | 2011-05-03 | Nokia Corporation | Channel equalization |
US20050226345A1 (en) * | 2004-03-31 | 2005-10-13 | Interdigital Technology Corporation | Apparatus for reducing channel interference between proximate wireless communication units |
US7751470B2 (en) * | 2005-02-07 | 2010-07-06 | Tektronix, Inc. | Time correlation of signal power to distortion characteristics |
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US20070184862A1 (en) * | 2006-02-09 | 2007-08-09 | M/A-Com, Inc. | Estimating time delays in a simulcast communication system |
US7944969B2 (en) * | 2007-01-05 | 2011-05-17 | Freescale Semiconductor, Inc. | Method and system for sampling video data |
FR2925798A1 (fr) * | 2007-12-21 | 2009-06-26 | France Telecom | Procede de pre-egalisation d'un signal de donnees par retournement temporel |
WO2009093396A1 (ja) * | 2008-01-25 | 2009-07-30 | Nec Corporation | 非線形歪補償回路、送信回路、及び非線形歪補償方法 |
US8169993B2 (en) * | 2008-04-16 | 2012-05-01 | Anritsu Company | Method and apparatus to estimate wireless base station signal quality over the air |
EP2427991B1 (fr) * | 2009-05-07 | 2018-04-18 | Orange | Procede de pre-egalisation par retournement temporel en fdd |
US8792396B2 (en) * | 2009-05-07 | 2014-07-29 | France Telecom | Method of pre-equalizing a data signal by time reversal in FDD |
WO2011047497A1 (en) * | 2009-10-19 | 2011-04-28 | Telefonaktiebolaget L M Ericsson (Publ) | Method of and equalizer for equalizing a radio frequency filter |
CN102098025B (zh) * | 2009-12-11 | 2013-09-18 | 电信科学技术研究院 | 一种级联滤波器的设计方法及设计装置 |
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US20140241412A1 (en) * | 2013-02-28 | 2014-08-28 | Samsung Electronics Co., Ltd. | Wireless communication system with interference cancellation mechanism and method of operation thereof |
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US10698095B1 (en) * | 2014-10-17 | 2020-06-30 | California Institute Of Technology | Systems and methods and performing offset IQ modulation |
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US11533068B1 (en) * | 2021-08-31 | 2022-12-20 | Texas Instruments Incorporated | Low intermediate frequency transmitter |
US20230082415A1 (en) * | 2021-09-16 | 2023-03-16 | Qorvo Us, Inc. | Phase and amplitude error correction in a transmission circuit |
US11962338B2 (en) | 2021-09-16 | 2024-04-16 | Qorvo Us, Inc. | Equalization filter calibration in a transceiver circuit |
US11906992B2 (en) | 2021-09-16 | 2024-02-20 | Qorvo Us, Inc. | Distributed power management circuit |
US20230080621A1 (en) * | 2021-09-16 | 2023-03-16 | Qorvo Us, Inc. | Phase and amplitude error correction in a transmission circuit |
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WO2000070751A1 (en) * | 1999-05-14 | 2000-11-23 | Harris Corporation | Broadcast transmission system with correction for distortion |
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-
2002
- 2002-10-18 GB GB0224297A patent/GB2394390B/en not_active Expired - Lifetime
-
2003
- 2003-10-20 US US10/531,152 patent/US7738593B2/en active Active
- 2003-10-20 AU AU2003271974A patent/AU2003271974A1/en not_active Abandoned
- 2003-10-20 ES ES03753813T patent/ES2362393T3/es not_active Expired - Lifetime
- 2003-10-20 DE DE60335729T patent/DE60335729D1/de not_active Expired - Lifetime
- 2003-10-20 JP JP2004544494A patent/JP4697935B2/ja not_active Expired - Lifetime
- 2003-10-20 EP EP03753813A patent/EP1557018B1/en not_active Expired - Lifetime
- 2003-10-20 AT AT03753813T patent/ATE495615T1/de not_active IP Right Cessation
- 2003-10-20 WO PCT/GB2003/004506 patent/WO2004036857A1/en active Application Filing
-
2010
- 2010-06-03 US US12/793,287 patent/US8514973B2/en not_active Expired - Lifetime
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WO2000070751A1 (en) * | 1999-05-14 | 2000-11-23 | Harris Corporation | Broadcast transmission system with correction for distortion |
Also Published As
Publication number | Publication date |
---|---|
US20100298030A1 (en) | 2010-11-25 |
GB2394390A (en) | 2004-04-21 |
DE60335729D1 (de) | 2011-02-24 |
ATE495615T1 (de) | 2011-01-15 |
GB0224297D0 (en) | 2002-11-27 |
JP2007527630A (ja) | 2007-09-27 |
US7738593B2 (en) | 2010-06-15 |
US8514973B2 (en) | 2013-08-20 |
EP1557018B1 (en) | 2011-01-12 |
US20060209881A1 (en) | 2006-09-21 |
EP1557018A1 (en) | 2005-07-27 |
ES2362393T3 (es) | 2011-07-04 |
GB2394390B (en) | 2005-07-06 |
WO2004036857A1 (en) | 2004-04-29 |
AU2003271974A1 (en) | 2004-05-04 |
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