JP4129014B2 - 移動通信端末 - Google Patents
移動通信端末 Download PDFInfo
- Publication number
- JP4129014B2 JP4129014B2 JP2005232564A JP2005232564A JP4129014B2 JP 4129014 B2 JP4129014 B2 JP 4129014B2 JP 2005232564 A JP2005232564 A JP 2005232564A JP 2005232564 A JP2005232564 A JP 2005232564A JP 4129014 B2 JP4129014 B2 JP 4129014B2
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- JP
- Japan
- Prior art keywords
- sampling rate
- mobile communication
- communication terminal
- channel matrix
- multipath interference
- Prior art date
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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
- H04B1/711—Interference-related aspects the interference being multi-path interference
- H04B1/7113—Determination of path profile
-
- 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
- H04B1/7103—Interference-related aspects the interference being multiple access interference
- H04B1/7107—Subtractive interference cancellation
-
- 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
- H04B1/711—Interference-related aspects the interference being multi-path interference
- H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
- H04B1/712—Weighting of fingers for combining, e.g. amplitude control or phase rotation using an inner loop
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
- H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
- H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
- H04B2201/70707—Efficiency-related aspects
Description
A.Klein, "Data Detection Algorithms Specially Designed for the Downlink ofMobile Radio Systems," Proc. of IEEE VTC'97, pp. 203-207, Phoenix, May 1997.T. Kawamura, K.Higuchi, Y. Kishiyama, and M. Sawahashi, "Comparison between multipathinterference canceller and chip equalizer in HSDPA in multipath channel,"Proc. of IEEE VTC 2002, pp. 459-463,Birmingham, May 2002.
図2は、第1実施形態における移動通信端末1の機能構成を例示する図である。図2に示すように、移動通信端末1は、A/D変換部11と、遅延プロファイル作成部12と、サンプル数制御部13と、チャネル行列生成部14と、重み行列生成部15と、干渉除去部16とを有する。
次に、本発明の第2実施形態について説明する。まず、図6を参照して第2実施形態における移動通信端末1sの機能構成について説明する。図6に示すように、第2実施形態における移動通信端末1sは、A/D変換部11と、遅延プロファイル作成部12と、サンプル数制御部13sと、チャネル行列生成部14と、重み行列生成部15と、干渉除去部16とを有する。
Claims (6)
- マルチパス干渉を除去するマルチパス干渉除去装置を搭載する移動通信端末であって、
前記マルチパス干渉除去装置のタップ数に応じて、受信信号からサンプリングするサンプル数を制御するサンプル数制御手段と、
前記サンプル数制御手段により制御される前記サンプル数分のサンプルデータに基づいてチャネル行列を生成するチャネル行列生成手段と、
前記チャネル行列生成手段により生成されたチャネル行列に基づいてマルチパス干渉を除去する干渉除去手段と、
を備えることを特徴とする移動通信端末。 - 前記サンプル数制御手段は、A/Dコンバータにおいてサンプリングされたサンプルデータから所定のサンプリングレートに対応するサンプルデータを抽出することによって前記サンプル数を制御することを特徴とする請求項1記載の移動通信端末。
- 前記所定のサンプリングレートは、前記A/Dコンバータにおけるサンプリングレートよりも低く、かつチップレートの2n倍(n:0以上の整数)のサンプリングレートであることを特徴とする請求項2記載の移動通信端末。
- 前記サンプル数制御手段は、前記マルチパス干渉除去装置が起動したときに、A/Dコンバータにおけるサンプリングレートを所定のサンプリングレートに下げることによって前記サンプル数を制御することを特徴とする請求項1記載の移動通信端末。
- 前記所定のサンプリングレートは、チップレートの2n倍(n:0以上の整数)のサンプリングレートであることを特徴とする請求項4記載の移動通信端末。
- 前記サンプル数制御手段は、前記タップ数が所定の閾値以上である場合に、前記サンプル数を低減させることを特徴とする請求項1〜5のいずれか一項に記載の移動通信端末。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005232564A JP4129014B2 (ja) | 2005-08-10 | 2005-08-10 | 移動通信端末 |
US11/499,717 US7817710B2 (en) | 2005-08-10 | 2006-08-07 | Mobile communication terminal |
ES06016576.8T ES2609904T3 (es) | 2005-08-10 | 2006-08-08 | Terminal de comunicación móvil |
EP06016576.8A EP1753151B1 (en) | 2005-08-10 | 2006-08-08 | Mobile communication terminal |
TW095129212A TW200713856A (en) | 2005-08-10 | 2006-08-09 | Mobile communication terminal |
CN2006101149199A CN1913372B (zh) | 2005-08-10 | 2006-08-10 | 移动通信终端 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005232564A JP4129014B2 (ja) | 2005-08-10 | 2005-08-10 | 移動通信端末 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2007049500A JP2007049500A (ja) | 2007-02-22 |
JP4129014B2 true JP4129014B2 (ja) | 2008-07-30 |
Family
ID=37451045
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2005232564A Expired - Fee Related JP4129014B2 (ja) | 2005-08-10 | 2005-08-10 | 移動通信端末 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7817710B2 (ja) |
EP (1) | EP1753151B1 (ja) |
JP (1) | JP4129014B2 (ja) |
CN (1) | CN1913372B (ja) |
ES (1) | ES2609904T3 (ja) |
TW (1) | TW200713856A (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPWO2006077829A1 (ja) * | 2005-01-18 | 2008-06-19 | 株式会社エヌ・ティ・ティ・ドコモ | 移動通信端末およびマルチパス干渉除去方法 |
US9253009B2 (en) * | 2007-01-05 | 2016-02-02 | Qualcomm Incorporated | High performance station |
KR101512538B1 (ko) * | 2009-02-16 | 2015-04-15 | 아니테 텔레콤즈 오와이 | 신호 추정치들을 형성하는 방법 및 장치 |
JP7468114B2 (ja) * | 2020-04-21 | 2024-04-16 | 日本電気株式会社 | 制御装置、無線通信方法及び無線通信プログラム |
Family Cites Families (24)
Publication number | Priority date | Publication date | Assignee | Title |
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US6259720B1 (en) * | 1996-12-12 | 2001-07-10 | Motorola, Inc. | Versatile digital signal processing system |
JP2991170B2 (ja) | 1997-10-01 | 1999-12-20 | 日本電気株式会社 | Cdma受信装置および方法 |
DE69906262T2 (de) * | 1999-07-01 | 2003-12-04 | Alcatel Sa | Adaptiver Wegesucher in einem CDMA-Empfänger |
JP3344478B2 (ja) | 1999-07-16 | 2002-11-11 | 日本電気株式会社 | Cdmaセルラシステムにおけるパスサーチ回路 |
JP2002009668A (ja) * | 2000-06-26 | 2002-01-11 | Ntt Docomo Inc | 通信装置および検波方法 |
TW540200B (en) | 2000-11-09 | 2003-07-01 | Interdigital Tech Corp | Single user detection |
US7027497B2 (en) * | 2000-12-19 | 2006-04-11 | Ntt Docomo, Inc. | Adaptive equalization method and adaptive equalizer |
JP4187968B2 (ja) * | 2000-12-19 | 2008-11-26 | 株式会社エヌ・ティ・ティ・ドコモ | 適応等化方法及び適応等化器 |
JP3686839B2 (ja) | 2001-02-21 | 2005-08-24 | 独立行政法人科学技術振興機構 | 干渉除去装置、無線端末装置、干渉除去方法 |
ATE344548T1 (de) * | 2001-03-26 | 2006-11-15 | Ecole Polytech | Verfahren und gerät zur abtastung und rekonstruktion von signalen |
JP3345406B1 (ja) * | 2001-05-25 | 2002-11-18 | 松下電器産業株式会社 | 無線受信装置及び無線受信方法 |
JP3637884B2 (ja) * | 2001-06-01 | 2005-04-13 | ソニー株式会社 | 逆拡散装置、伝播路推定装置、受信装置ならびに干渉抑圧装置、逆拡散、伝播路推定、受信および干渉抑圧方法、該プログラムおよび該プログラムを記録した記録媒体 |
JP2004364321A (ja) | 2001-06-01 | 2004-12-24 | Sony Corp | 逆拡散装置、伝播路推定装置、受信装置ならびに干渉抑圧装置、逆拡散、伝播路推定、受信および干渉抑圧方法、該プログラムおよび該プログラムを記録した記録媒体 |
US7190749B2 (en) * | 2001-06-06 | 2007-03-13 | Qualcomm Incorporated | Method and apparatus for canceling pilot interference in a wireless communication system |
US7209511B2 (en) * | 2001-08-31 | 2007-04-24 | Ericsson Inc. | Interference cancellation in a CDMA receiving system |
SG122753A1 (en) | 2001-11-30 | 2006-06-29 | Sony Corp | Advanced receiver for CDMA downlink |
US7440524B2 (en) | 2002-08-13 | 2008-10-21 | Mediatek, Inc. | Channel estimation in a wireless transmission system |
JP4052060B2 (ja) * | 2002-08-21 | 2008-02-27 | 日本電気株式会社 | Cdma無線装置及びそれに用いる簡易パス推定方法 |
AU2003259590A1 (en) | 2003-01-23 | 2004-08-12 | Nec Australia Pty Ltd | Cell search method and apparatus in a WCDMA system |
US7212591B2 (en) | 2003-04-28 | 2007-05-01 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods and receivers that estimate multi-path delays by removing signal rays from a power-delay profile |
US7561618B2 (en) * | 2004-04-30 | 2009-07-14 | Texas Instruments Incorporated | Reconfigurable chip level equalizer architecture for multiple antenna systems |
US7492828B2 (en) * | 2004-06-18 | 2009-02-17 | Qualcomm Incorporated | Time synchronization using spectral estimation in a communication system |
JP2006101308A (ja) | 2004-09-30 | 2006-04-13 | Fujitsu Ltd | 無線基地局装置及びパスサーチ方法 |
JPWO2006077829A1 (ja) | 2005-01-18 | 2008-06-19 | 株式会社エヌ・ティ・ティ・ドコモ | 移動通信端末およびマルチパス干渉除去方法 |
-
2005
- 2005-08-10 JP JP2005232564A patent/JP4129014B2/ja not_active Expired - Fee Related
-
2006
- 2006-08-07 US US11/499,717 patent/US7817710B2/en not_active Expired - Fee Related
- 2006-08-08 ES ES06016576.8T patent/ES2609904T3/es active Active
- 2006-08-08 EP EP06016576.8A patent/EP1753151B1/en not_active Not-in-force
- 2006-08-09 TW TW095129212A patent/TW200713856A/zh not_active IP Right Cessation
- 2006-08-10 CN CN2006101149199A patent/CN1913372B/zh not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP1753151A3 (en) | 2007-09-19 |
US20070036205A1 (en) | 2007-02-15 |
JP2007049500A (ja) | 2007-02-22 |
EP1753151A2 (en) | 2007-02-14 |
TWI334281B (ja) | 2010-12-01 |
CN1913372B (zh) | 2011-05-18 |
TW200713856A (en) | 2007-04-01 |
CN1913372A (zh) | 2007-02-14 |
EP1753151B1 (en) | 2016-10-26 |
US7817710B2 (en) | 2010-10-19 |
ES2609904T3 (es) | 2017-04-25 |
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