JP5615820B2 - 無線中継装置および無線中継方法 - Google Patents
無線中継装置および無線中継方法 Download PDFInfo
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- 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
- H04B7/0667—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 delayed versions of same signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
-
- 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
- H04B7/022—Site diversity; Macro-diversity
- H04B7/026—Co-operative diversity, e.g. using fixed or mobile stations as relays
-
- 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
- H04B7/0619—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 using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
- H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0071—Use of interleaving
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
- H04L1/0086—Unequal error protection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
-
- 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
-
- 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
- H04L25/03178—Arrangements involving sequence estimation techniques
- H04L25/03248—Arrangements for operating in conjunction with other apparatus
- H04L25/03286—Arrangements for operating in conjunction with other apparatus with channel-decoding circuitry
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L2001/0092—Error control systems characterised by the topology of the transmission link
- H04L2001/0097—Relays
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Power Engineering (AREA)
- Radio Transmission System (AREA)
- Radio Relay Systems (AREA)
- Mobile Radio Communication Systems (AREA)
Description
本実施の形態に係る無線中継装置100の構成を図1に示す。
上述したように、無線送信装置と無線中継装置との間では、多値変調されたデータ信号の送受信が行われる。このとき、無線中継装置は、無線送信装置から送信されるパイロット信号を用いて推定されるチャネル推定値に基づいて、多値変調されたデータ信号に対して、ダイバーシチ受信処理を行う。
1シンボルで送信されるビット間の受信品質は互いに異なる。具体的には、1シンボルで送信される複数のビットのうち、上位ビットほど受信品質は良好であり、下位ビットほど受信品質は劣悪である。例えば、256QAMでは、1シンボルで8ビット(例えば、上位ビットから順にi1,q1,i2,q2,i3,q3,i4,q4)が送信される。このとき、最上位ビットであるビットi1,q1の受信品質が最も高くなり、最下位ビットであるi4,q4の受信品質が最も低くなる。
本実施の形態では、無線中継装置と無線受信装置との間で発生するマルチパス数(つまり、無線受信装置で検出されるマルチパス数)が、無線中継装置のアンテナ数Nrelayよりも少ない場合について説明する。
101 アンテナ
102 受信RF部
103 チャネル推定部
104 CQI生成部
105,114 変調部
106,109 ダイバーシチ受信部
107 多値数検出部
108 復調部
110 制御情報検出部
111 ストリーム数決定部
112 ストリーム生成部
113 パイロット生成部
115 送信RF部
Claims (9)
- 無線送信装置と無線受信装置との間で信号を中継送信する無線中継装置であって、
N本(Nは2以上の自然数)のアンテナポートを有し、
前記無線送信装置から送信される、M(ただし、M≦N×K、Kは1以上の自然数)の変調多値数を有する多値変調方式で変調された前記信号を、前記N本のアンテナポートで受信する受信手段と、
前記信号を分割してN個のストリームを生成する生成手段と、
前記N個のストリームを前記Kの変調多値数(ただし、M>K)で変調する変調手段と、
変調後の前記N個のストリームをマルチパス多重して前記N本のアンテナポートで前記無線受信装置へ送信する送信手段と、
を具備する無線中継装置。 - 前記Kは2であり、
前記変調手段は、前記N個のストリームをQPSK変調する、
請求項1記載の無線中継装置。 - 前記Kは1であり、
前記変調手段は、前記N個のストリームをBPSK変調する、
請求項1記載の無線中継装置。 - 前記受信手段は、前記無線送信装置から送信される、拡散系列で構成されるパイロット信号を用いて推定されるチャネル推定値を用いて、前記信号を前記N本のアンテナポートでダイバーシチ受信する、
請求項1記載の無線中継装置。 - 前記送信手段は、ZAC系列で構成されるパイロット信号を前記N本のアンテナポートで前記無線受信装置へ送信する、
請求項1記載の無線中継装置。 - 前記生成手段は、前記Mの変調多値数で変調された前記信号の各シンボルを構成するM個のビットのうち、より上位のビットを、前記N個のストリームのうち回線品質がより良いストリームに配置する、
請求項1記載の無線中継装置。 - 前記生成手段は、前記Mの変調多値数で変調された前記信号の各シンボルを構成するM個のビットのうち、より下位のビットを、前記N個のストリームのうち回線品質がより良いストリームに配置する、
請求項1記載の無線中継装置。 - 前記生成手段は、自装置と前記無線受信装置との間で多重可能なストリーム数が前記Nよりも少ない場合、前記N個のストリームを前記多重可能なストリーム数のストリームにまとめ、
前記変調手段は、前記多重可能なストリーム数のストリームをQPSK変調する、
請求項1記載の無線中継装置。 - N本(Nは2以上の自然数)のアンテナポートを有し、無線送信装置と無線受信装置との間で信号を中継送信する無線中継装置における無線中継方法であって、
前記無線送信装置から送信される、M(ただし、M≦N×K、Kは1以上の自然数)の変調多値数を有する多値変調方式で変調された前記信号を、前記N本のアンテナポートで受信し、
前記信号を分割してN個のストリームを生成し、
前記N個のストリームを前記Kの変調多値数(ただし、M>K)で変調し、
変調後の前記N個のストリームをマルチパス多重して前記N本のアンテナポートで前記無線受信装置へ送信する、
無線中継方法。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP2011524660A JP5615820B2 (ja) | 2009-07-28 | 2010-07-27 | 無線中継装置および無線中継方法 |
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JP2009175688 | 2009-07-28 | ||
JP2009175688 | 2009-07-28 | ||
JP2011524660A JP5615820B2 (ja) | 2009-07-28 | 2010-07-27 | 無線中継装置および無線中継方法 |
PCT/JP2010/004770 WO2011013355A1 (ja) | 2009-07-28 | 2010-07-27 | 無線中継装置および無線中継方法 |
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JPWO2011013355A1 JPWO2011013355A1 (ja) | 2013-01-07 |
JP5615820B2 true JP5615820B2 (ja) | 2014-10-29 |
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US (1) | US8774253B2 (ja) |
EP (1) | EP2461508B1 (ja) |
JP (1) | JP5615820B2 (ja) |
KR (1) | KR101627890B1 (ja) |
WO (1) | WO2011013355A1 (ja) |
Cited By (1)
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US20220311484A1 (en) * | 2011-04-19 | 2022-09-29 | Sun Patent Trust | Pre-coding method and pre-coding device |
Families Citing this family (8)
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EP2313990B1 (en) * | 2008-08-12 | 2018-05-23 | BlackBerry Limited | Enabling downlink transparent relay in a wireless communications network |
JP5515558B2 (ja) * | 2009-09-25 | 2014-06-11 | ソニー株式会社 | 通信システム、中継装置および通信装置 |
JP5482068B2 (ja) | 2009-10-01 | 2014-04-23 | ソニー株式会社 | 中継局、中継方法、無線通信システム及び無線通信装置 |
US20120140842A1 (en) * | 2010-12-06 | 2012-06-07 | Qualcomm Incorporated | Signaling to protect advanced receiver performance in wireless local area networks (lans) |
FR3000856B1 (fr) * | 2013-01-04 | 2015-02-06 | Ercom Engineering Reseaux Comm | Procede et systeme de test de stations de base d’un reseau de telecommunications mobiles |
US10903895B1 (en) | 2019-03-21 | 2021-01-26 | Sprint Spectrum L.P. | Scheduling MU-MIMO resources in relayed networks |
US20200379830A1 (en) * | 2019-06-03 | 2020-12-03 | Parascript, Llc | Dynamic reject rate adjustment to optimally process uneven flow of documents while maintaining average error rate restriction |
EP4360226A1 (en) * | 2021-06-24 | 2024-05-01 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Wireless communication scenario, devices for operating therein, beacon device and methods for operating the same |
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- 2010-07-27 KR KR1020127001987A patent/KR101627890B1/ko active IP Right Grant
- 2010-07-27 EP EP10804106.2A patent/EP2461508B1/en not_active Not-in-force
- 2010-07-27 WO PCT/JP2010/004770 patent/WO2011013355A1/ja active Application Filing
- 2010-07-27 JP JP2011524660A patent/JP5615820B2/ja not_active Expired - Fee Related
- 2010-07-27 US US13/383,389 patent/US8774253B2/en active Active
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EP2461508B1 (en) | 2016-12-28 |
US8774253B2 (en) | 2014-07-08 |
JPWO2011013355A1 (ja) | 2013-01-07 |
KR101627890B1 (ko) | 2016-06-07 |
WO2011013355A1 (ja) | 2011-02-03 |
EP2461508A4 (en) | 2015-01-14 |
EP2461508A1 (en) | 2012-06-06 |
KR20120052941A (ko) | 2012-05-24 |
US20120147930A1 (en) | 2012-06-14 |
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