JPWO2006078019A1 - 移動通信端末およびマルチパス干渉除去装置の起動を制御する方法 - Google Patents
移動通信端末およびマルチパス干渉除去装置の起動を制御する方法 Download PDFInfo
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- 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
- H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
- H04L25/03019—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception
- H04L25/03038—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a non-recursive structure
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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
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
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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
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- 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
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
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- 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
- H04B2201/70709—Efficiency-related aspects with discontinuous detection
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- 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
- H04B2201/7071—Efficiency-related aspects with dynamic control of receiver resources
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- 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
- H04L2025/03592—Adaptation methods
- H04L2025/03726—Switching between algorithms
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Mobile Radio Communication Systems (AREA)
- Noise Elimination (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Transceivers (AREA)
Abstract
Description
A. Klein, "Data Detection Algorithms Specially Designed for the Downlink of Mobile Radio Systems," Proc. of IEEE VTC'97, pp. 203-207, Phoenix, May 1997.T. Kawamura, K. Higuchi, Y. Kishiyama, and M. Sawahashi, "Comparison between multipath interference canceller and chip equalizer in HSDPA in multipath channel," Proc. of IEEE VTC 2002, pp. 459-463,Birmingham, May 2002.
従来のW−CDMA(Wideband Code Division Multiple Access)において採用されている送信電力制御技術では、移動通信端末の受信品質が常に一定になるように、基地局の送信電力が制御されている。したがって、W−CDMA技術が採用された移動通信端末では、線形等化器を搭載して希望波対干渉波電力比(SIR:Signal to Interference power Ratio)を向上させようとしても、移動通信端末のスループットを向上させることができないうえに、却って消費電力が増大してしまうことになる。
一般に、線形等化器30は、マルチパスによる干渉を取り除くための装置である。したがって、マルチパスが存在しない場合や、存在していても受信電力が極めて小さい場合には、マルチパス干渉除去を適用しても特にメリットがないうえに、マルチパス干渉除去を適用することによってマルチパス干渉を除去するための重み行列が信号に乗算されることになる等、却って通信環境を悪化させてしまうことになる。
一般に、移動通信端末が高速で移動している場合には、チャネル行列を生成するためのチャネル推定精度が劣化してしまうため、マルチパス干渉の除去効果が得られない事態が生ずる。
移動通信端末が基地局から離れた場所に在圏する場合等には、在圏している基地局からの希望波よりも、他の基地局からの干渉波の方が大きくなる場合がある。このような場合には、チャネル行列を生成するためのチャネル推定精度が劣化してしまうため、マルチパス干渉の除去効果が得られない事態が生ずる。
Claims (10)
- マルチパスの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、
通信に関する制御信号に基づいて、前記マルチパス干渉除去装置を起動させるか否かを判定する判定手段と、
前記判定手段によって前記マルチパス干渉除去装置を起動させると判定された場合に、前記マルチパス干渉除去装置を起動させる制御手段と、
を備えることを特徴とする移動通信端末。 - 前記判定手段は、基地局との間で送受信される前記制御信号に基づいて、通信が開始されたか否かを判定し、
前記制御手段は、前記判定手段によって通信が開始されたと判定された場合に、前記マルチパス干渉除去装置を起動させることを特徴とする請求項1記載の移動通信端末。 - 前記判定手段は、基地局から送信される前記制御信号に基づいて、基地局が適応変復調・誤り訂正符号化技術を適用しているか否かを判定し、
前記制御手段は、前記判定手段によって基地局が適応変復調・誤り訂正符号化技術を適用していると判定された場合に、前記マルチパス干渉除去装置を起動させることを特徴とする請求項1記載の移動通信端末。 - 前記判定手段は、基地局から送信される前記制御信号に基づいて、有効な受信パス数が一定数以上であるか否かを判定し、
前記制御手段は、前記判定手段によって有効な受信パス数が一定数以上であると判定された場合に、前記マルチパス干渉除去装置を起動させることを特徴とする請求項1記載の移動通信端末。 - 前記判定手段は、基地局から送信される前記制御信号に基づいて、希望波対干渉波電力比が一定値以上であるか否かを判定し、
前記制御手段は、前記判定手段によって希望波対干渉波電力比が一定値以上であると判定された場合に、前記マルチパス干渉除去装置を起動させることを特徴とする請求項1記載の移動通信端末。 - 移動通信端末に搭載されるマルチパスの干渉を除去するマルチパス干渉除去装置の起動を制御する方法であって、
通信に関する制御信号に基づいて、前記マルチパス干渉除去装置を起動させるか否かを判定する判定ステップと、
前記判定ステップにおいて前記マルチパス干渉除去装置を起動させると判定された場合に、前記マルチパス干渉除去装置を起動させる制御ステップと、
を備えることを特徴とするマルチパス干渉除去装置の起動を制御する方法。 - 前記判定ステップは、基地局との間で送受信される前記制御信号に基づいて、通信が開始されたか否かを判定し、
前記制御ステップは、前記判定ステップにおいて通信が開始されたと判定された場合に、前記マルチパス干渉除去装置を起動させることを特徴とする請求項6記載のマルチパス干渉除去装置の起動を制御する方法。 - 前記判定ステップは、基地局から送信される前記制御信号に基づいて、基地局が適応変復調・誤り訂正符号化技術を適用しているか否かを判定し、
前記制御ステップは、前記判定ステップにおいて基地局が適応変復調・誤り訂正符号化技術を適用していると判定された場合に、前記マルチパス干渉除去装置を起動させることを特徴とする請求項6記載のマルチパス干渉除去装置の起動を制御する方法。 - 前記判定ステップは、基地局から送信される前記制御信号に基づいて、有効な受信パス数が一定数以上であるか否かを判定し、
前記制御ステップは、前記判定ステップにおいて有効な受信パス数が一定数以上であると判定された場合に、前記マルチパス干渉除去装置を起動させることを特徴とする請求項6記載のマルチパス干渉除去装置の起動を制御する方法。 - 前記判定ステップは、基地局から送信される前記制御信号に基づいて、希望波対干渉波電力比が一定値以上であるか否かを判定し、
前記制御ステップは、前記判定ステップにおいて希望波対干渉波電力比が一定値以上であると判定された場合に、前記マルチパス干渉除去装置を起動させることを特徴とする請求項6記載のマルチパス干渉除去装置の起動を制御する方法。
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- 2006-01-23 KR KR1020077017780A patent/KR100932632B1/ko active IP Right Grant
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EP2204918A1 (en) | 2010-07-07 |
EP1843492A1 (en) | 2007-10-10 |
EP1843492A4 (en) | 2009-04-08 |
EP2256944B1 (en) | 2011-10-05 |
KR100932632B1 (ko) | 2009-12-21 |
KR20070093444A (ko) | 2007-09-18 |
TW200640177A (en) | 2006-11-16 |
CN101908907A (zh) | 2010-12-08 |
US20090023392A1 (en) | 2009-01-22 |
CN101908907B (zh) | 2012-07-25 |
EP1843492B1 (en) | 2011-03-16 |
EP2101416A3 (en) | 2010-02-17 |
JP2010081620A (ja) | 2010-04-08 |
EP2256944A1 (en) | 2010-12-01 |
TWI316340B (ja) | 2009-10-21 |
CN101107794A (zh) | 2008-01-16 |
WO2006078019A1 (ja) | 2006-07-27 |
ATE527760T1 (de) | 2011-10-15 |
EP2101416B1 (en) | 2011-05-25 |
JP4425283B2 (ja) | 2010-03-03 |
CN101917366A (zh) | 2010-12-15 |
DE602006020690D1 (de) | 2011-04-28 |
EP2101416A2 (en) | 2009-09-16 |
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