JP4841333B2 - 無線装置およびそれを利用した通信システム - Google Patents
無線装置およびそれを利用した通信システム Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
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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
- H04L1/02—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
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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
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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
- H04B7/0697—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 spatial multiplexing
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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
- H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
- H04L1/0083—Formatting with frames or packets; Protocol or part of protocol for error control
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
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- 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
- H04L27/2602—Signal structure
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- 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
- H04L27/2602—Signal structure
- H04L27/261—Details of reference signals
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
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- H—ELECTRICITY
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- 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
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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
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
-
- 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
- H04L2025/03426—Arrangements for removing intersymbol interference characterised by the type of transmission transmission using multiple-input and multiple-output channels
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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
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
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- 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
- H04L27/2602—Signal structure
- H04L27/2603—Signal structure ensuring backward compatibility with legacy system
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
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- H04L5/0023—Time-frequency-space
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/02—Channels characterised by the type of signal
- H04L5/023—Multiplexing of multicarrier modulation signals
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Description
Sinem Coleri,Mustafa Ergen,Anuj Puri, and Ahmad Bahai,"Channel Estimation Techniques Based on Pilot Arrangement in OFDM Systems",IEEE Transactions on broadcasting,vol.48,No.3,pp.223−229,Sept.2002.
Claims (5)
- 複数の系列によって形成されるパケット信号を送信する無線装置であって、
データ信号に関する制御信号と当該データ信号との組合せであって、かつ複数の系列にそれぞれ配置されるべきデータ信号が含まれた組合せを複数入力する入力部と、
前記入力部において入力した複数の組合せのうち、先頭の組合せに含まれた制御信号の前段に第1の既知信号を配置させ、かつ当該制御信号の後段に第2の既知信号を配置させながら、第2の既知信号の後段に、先頭の組合せに含まれたデータ信号を配置させてから、残りの組合せの少なくとも1つに第2の既知信号を付加した上で、当該データ信号の後段に、残りの組合せを順次配置させることによって、パケット信号を生成する生成部と、
前記生成部において生成したパケット信号を送信する送信部とを備え、
前記生成部は、複数の系列に配置された第1の既知信号に対してCDD(Cyclic Delay Diversity)を実行しながら、複数の系列に配置された第2の既知信号と制御信号に対してもCDDを実行しており、第1の既知信号に対する複数の系列のそれぞれにおけるタイミングシフト量と、第2の既知信号に対する複数の系列のそれぞれにおけるタイミングシフト量とを異なった値に設定しつつ、先頭の組合せに含まれた制御信号に対する複数の系列のそれぞれにおけるタイミングシフト量と、第1の既知信号に対する複数の系列のそれぞれにおけるタイミングシフト量とを同一の値に設定し、残りの組合せに含まれた制御信号に対する複数の系列のそれぞれにおけるタイミングシフト量と、第2の既知信号に対する複数の系列のそれぞれにおけるタイミングシフト量とを同一の値に設定することを特徴とする無線装置。 - 制御信号の前段に第1の既知信号を配置させ、かつ当該制御信号の後段に第2の既知信号を配置させながら、第2の既知信号の後段にデータ信号を配置させる第1のフォーマットと、第2の既知信号の後段に制御信号を配置させ、当該制御信号の後段にデータ信号を配置させる第2のフォーマットとのいずれかを選択し、選択したフォーマットのパケット信号を生成部に生成させる選択部をさらに備え、
前記選択部は、前記入力部において入力した複数の組合せのうち、前記生成部に前記先頭の組合せのパケット信号を生成させるときは、前記第1のフォーマットを選択し、前記生成部に前記残りの組合せのパケット信号を生成させるときは、前記第2のフォーマットを選択することを特徴とする請求項1に記載の無線装置。 - 前記生成部は、データ信号に対してもCDDを実行しており、先頭の組合せに含まれた制御信号に対する複数の系列のそれぞれにおけるタイミングシフト量と、データ信号に対する複数の系列のそれぞれにおけるタイミングシフト量とを異なった値に設定し、残りの組合せに含まれた制御信号に対する複数の系列のそれぞれにおけるタイミングシフト量と、データ信号に対する複数の系列のそれぞれにおけるタイミングシフト量とを同一の値に設定することを特徴とする請求項1または2に記載の無線装置。
- 前記生成部は、先頭の組合せに含まれた制御信号に対する複数の系列のそれぞれにおけるタイミングシフト量の絶対値の最大値よりも、残りの組合せに含まれた制御信号に対する複数の系列のそれぞれにおけるタイミングシフト量の絶対値の最大値の方を大きな値に設定することを特徴とする請求項1または2に記載の無線装置。
- 複数の系列によって形成されるパケット信号を送信する送信装置と、
前記送信装置から送信されたパケット信号を受信する受信装置とを備え、
前記送信装置は、
データ信号に関する制御信号と当該データ信号との組合せであって、かつ複数の系列にそれぞれ配置されるべきデータ信号が含まれた組合せを複数入力する入力部と、
前記入力部において入力した複数の組合せのうち、先頭の組合せに含まれた制御信号の前段に第1の既知信号を配置させ、かつ当該制御信号の後段に第2の既知信号を配置させながら、第2の既知信号の後段に、先頭の組合せに含まれたデータ信号を配置させてから、残りの組合せの少なくとも1つに第2の既知信号を付加した上で、当該データ信号の後段に、残りの組合せを順次配置させることによって、パケット信号を生成する生成部と、
前記生成部において生成したパケット信号を送信する送信部とを備え、
前記生成部は、複数の系列に配置された第1の既知信号に対してCDD(Cyclic Delay Diversity)を実行しながら、複数の系列に配置された第2の既知信号と制御信号に対してもCDDを実行しており、第1の既知信号に対する複数の系列のそれぞれにおけるタイミングシフト量と、第2の既知信号に対する複数の系列のそれぞれにおけるタイミングシフト量とを異なった値に設定しつつ、先頭の組合せに含まれた制御信号に対する複数の系列のそれぞれにおけるタイミングシフト量と、第1の既知信号に対する複数の系列のそれぞれにおけるタイミングシフト量とを同一の値に設定し、残りの組合せに含まれた制御信号に対する複数の系列のそれぞれにおけるタイミングシフト量と、第2の既知信号に対する複数の系列のそれぞれにおけるタイミングシフト量とを同一の値に設定することを特徴とする通信システム。
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US71773305P | 2005-09-19 | 2005-09-19 | |
US60/717,733 | 2005-09-19 |
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JP2007089125A JP2007089125A (ja) | 2007-04-05 |
JP4841333B2 true JP4841333B2 (ja) | 2011-12-21 |
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US (1) | US8351463B2 (ja) |
EP (1) | EP1927216B1 (ja) |
JP (1) | JP4841333B2 (ja) |
KR (1) | KR101279187B1 (ja) |
CN (1) | CN101199164B (ja) |
TW (1) | TWI397282B (ja) |
WO (1) | WO2007034728A1 (ja) |
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EP1794901B1 (en) * | 2004-09-30 | 2014-02-26 | LG Electronics Inc. | Method of receiving and transmitting data and estimating channel information in ofdm/ofdma mobile communications system |
JP4753737B2 (ja) * | 2005-07-18 | 2011-08-24 | 三洋電機株式会社 | 無線装置 |
EP1944896A1 (en) | 2007-01-09 | 2008-07-16 | Matsushita Electric Industrial Co., Ltd. | Configuration of control channels in a mobile communication system |
JP5054193B2 (ja) | 2007-07-18 | 2012-10-24 | マーベル ワールド トレード リミテッド | 複数のクライアント局から独立したデータを同時アップリンク伝送する無線ネットワーク |
WO2009012446A2 (en) | 2007-07-18 | 2009-01-22 | Marvell World Trade Ltd. | Access point with simultaneous downlink transmission of independent data for multiple client stations |
US8982889B2 (en) | 2008-07-18 | 2015-03-17 | Marvell World Trade Ltd. | Preamble designs for sub-1GHz frequency bands |
US8259572B2 (en) * | 2008-12-02 | 2012-09-04 | Kyocera Corporation | Communication method and transmitting apparatus utilizing the same |
US8462863B1 (en) * | 2009-07-23 | 2013-06-11 | Marvell International Ltd. | Midamble for WLAN PHY frames |
US9077594B2 (en) | 2009-07-23 | 2015-07-07 | Marvell International Ltd. | Coexistence of a normal-rate physical layer and a low-rate physical layer in a wireless network |
US9191923B2 (en) * | 2011-04-15 | 2015-11-17 | Qualcomm Incorporated | Systems and methods for range extension of wireless communication in sub gigahertz bands |
US8774124B2 (en) * | 2011-04-24 | 2014-07-08 | Broadcom Corporation | Device coexistence within single user, multiple user, multiple access, and/or MIMO wireless communications |
US20120327871A1 (en) * | 2011-06-24 | 2012-12-27 | Interdigital Patent Holdings, Inc. | Non-legacy preamble for wireless local area networks |
EP2752066B1 (en) | 2011-08-29 | 2016-09-14 | Marvell World Trade Ltd. | Coexistence of a normal-rate physical layer and a low-rate physical layer in a wireless network |
CN107579761A (zh) * | 2012-05-09 | 2018-01-12 | 交互数字专利控股公司 | 在无线接入点中实施的方法及无线接入点 |
US9398123B2 (en) * | 2013-05-03 | 2016-07-19 | Qualcomm Incorporated | Systems and methods for aggregation of physical protocol data units on a wireless network |
US10218542B1 (en) * | 2016-10-14 | 2019-02-26 | Marvell International Ltd. | Channel estimate improvement with L-LTF and HT-LTF averaging |
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JP3735080B2 (ja) * | 2002-04-09 | 2006-01-11 | パナソニック モバイルコミュニケーションズ株式会社 | Ofdm通信装置およびofdm通信方法 |
DE10251322B4 (de) * | 2002-11-04 | 2006-10-26 | Advanced Micro Devices, Inc., Sunnyvale | Early-Late-Korrelation zur Timingfehlerkorrektur in Datenkommunikationsempfängern |
JP4353774B2 (ja) * | 2002-12-04 | 2009-10-28 | パナソニック株式会社 | データ送信方法とデータ受信方法およびそれらを用いた送信装置と受信装置 |
JP4254245B2 (ja) * | 2003-01-15 | 2009-04-15 | ソニー株式会社 | 通信装置 |
WO2004088851A1 (ja) * | 2003-03-31 | 2004-10-14 | Fujitsu Limited | 信号伝送方法 |
AU2003271665A1 (en) * | 2003-09-30 | 2005-05-11 | Docomo Communications Laboratories Europe Gmbh | Apparatus and method for cyclic delay diversity |
US7616698B2 (en) * | 2003-11-04 | 2009-11-10 | Atheros Communications, Inc. | Multiple-input multiple output system and method |
JP4318569B2 (ja) * | 2004-01-28 | 2009-08-26 | 三洋電機株式会社 | 相関器およびそれを利用した受信装置 |
JP4130191B2 (ja) * | 2004-01-28 | 2008-08-06 | 三洋電機株式会社 | 送信装置 |
DE602004016219D1 (de) * | 2004-02-19 | 2008-10-09 | Ntt Docomo Inc | Kanalschätzer und verfahren zur schätzung einer kanalübertragungsfunktion sowie vorrichtung und verfahren zur erzeugung von pilotsequenzen |
JP2006178406A (ja) | 2004-11-25 | 2006-07-06 | Konica Minolta Opto Inc | 投影光学系 |
US7924764B2 (en) * | 2005-07-28 | 2011-04-12 | Broadcom Corporation | Method and apparatus for packet processing |
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CN101199164B (zh) | 2014-05-07 |
KR20080051179A (ko) | 2008-06-10 |
EP1927216B1 (en) | 2014-12-24 |
JP2007089125A (ja) | 2007-04-05 |
US8351463B2 (en) | 2013-01-08 |
KR101279187B1 (ko) | 2013-06-27 |
WO2007034728A1 (en) | 2007-03-29 |
TWI397282B (zh) | 2013-05-21 |
US20070081602A1 (en) | 2007-04-12 |
CN101199164A (zh) | 2008-06-11 |
EP1927216A1 (en) | 2008-06-04 |
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