JP4841256B2 - 無線装置 - Google Patents
無線装置 Download PDFInfo
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- JP4841256B2 JP4841256B2 JP2006022169A JP2006022169A JP4841256B2 JP 4841256 B2 JP4841256 B2 JP 4841256B2 JP 2006022169 A JP2006022169 A JP 2006022169A JP 2006022169 A JP2006022169 A JP 2006022169A JP 4841256 B2 JP4841256 B2 JP 4841256B2
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- ltf
- signal
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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
- H04B7/0671—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 using different delays between antennas
-
- 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
- H04L25/0226—Channel estimation using sounding signals sounding signals per se
-
- 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
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0014—Three-dimensional division
- H04L5/0023—Time-frequency-space
-
- 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
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
-
- 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
- H04L25/0204—Channel estimation of multiple channels
-
- 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
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Radio Transmission System (AREA)
- Mobile Radio Communication Systems (AREA)
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 (3)
- 複数のサブキャリアを使用し、第1の無線通信システムで規定されたMIMO用のLTFの前段に、前記第1の無線通信システムとは異なった第2の無線通信システムで規定された従来用のLTFが配置され、複数の系列で形成された第1のパケットフォーマットと、従来用のLTFが配置されずに、MIMO用のLTFが前方に配置され、複数の系列で形成された第2のパケットフォーマットのいずれかを選択的に使用したパケット信号を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、MIMO用のLTFにおいて使用すべきサブキャリアは、従来用のLTFにおいて使用すべきサブキャリアよりも多く、かつ従来用のLTFにおいて使用すべきサブキャリアは、MIMO用のLTFにおいて使用すべきサブキャリアのうちの中央部分のサブキャリアであり、
前記生成部は、MIMO用のLTFと従来用のLTFとに対してCDD(Cyclic Delay Diversity)を実行しており、従来用のLTFに対する複数の系列のそれぞれにおけるシフト量のうち、絶対値の最大値よりも、MIMO用のLTFに対する複数の系列のそれぞれにおけるシフト量のうち、絶対値の最大値を大きくし、
前記生成部は、第1のパケットフォーマットと第2のパケットフォーマットとのそれぞれの先頭に、CDDがなされたSTFを配置しており、第1のパケットフォーマットに配置されたSTFに対する複数の系列のそれぞれにおけるシフト量のうち、絶対値の最大値よりも、第2のパケットフォーマットに配置されたSTFに対する複数の系列のそれぞれにおけるシフト量のうち、絶対値の最大値を大きくすることを特徴とする無線装置。 - 前記生成部では、相互相関が小さくなるように、MIMO用のLTFと従来用のLTFを規定することを特徴とする請求項1に記載の無線装置。
- 複数のサブキャリアを使用し、第1の無線通信システムで規定されたMIMO用のLTFの前段に、前記第1の無線通信システムとは異なった第2の無線通信システムで規定された従来用のLTFが配置され、複数の系列で形成されたパケットフォーマットを使用したパケット信号を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、MIMO用のLTFにおいて使用すべきサブキャリアは、従来用のLTFにおいて使用すべきサブキャリアよりも多く、かつ従来用のLTFにおいて使用すべきサブキャリアは、MIMO用のLTFにおいて使用すべきサブキャリアのうちの中央部分のサブキャリアであり、
前記生成部は、MIMO用のLTFと従来用のLTFとに対してCDD(Cyclic Delay Diversity)を実行しており、従来用のLTFに対する複数の系列のそれぞれにおけるシフト量のうち、絶対値の最大値よりも、MIMO用のLTFに対する複数の系列のそれぞれにおけるシフト量のうち、絶対値の最大値を大きくし、
前記生成部は、パケットフォーマットの先頭に、CDDがなされたSTFを配置しており、STFに対する複数の系列のそれぞれにおけるシフト量のうち、絶対値の最大値と、従来用のLTFに対する複数の系列のそれぞれにおけるシフト量のうち、絶対値の最大値とを等しくすることを特徴とする無線装置。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US69425905P | 2005-06-28 | 2005-06-28 | |
US60/694,259 | 2005-06-28 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2011176357A Division JP2012005142A (ja) | 2005-06-28 | 2011-08-11 | 無線装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2007013919A JP2007013919A (ja) | 2007-01-18 |
JP4841256B2 true JP4841256B2 (ja) | 2011-12-21 |
Family
ID=37751727
Family Applications (2)
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JP2006022169A Active JP4841256B2 (ja) | 2005-06-28 | 2006-01-31 | 無線装置 |
JP2011176357A Pending JP2012005142A (ja) | 2005-06-28 | 2011-08-11 | 無線装置 |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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JP2011176357A Pending JP2012005142A (ja) | 2005-06-28 | 2011-08-11 | 無線装置 |
Country Status (2)
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US (2) | US8116389B2 (ja) |
JP (2) | JP4841256B2 (ja) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4841256B2 (ja) * | 2005-06-28 | 2011-12-21 | 三洋電機株式会社 | 無線装置 |
US8619684B2 (en) * | 2008-05-01 | 2013-12-31 | Qualcomm Incorporated | Method and apparatus for downlink data arrival |
KR20110036485A (ko) * | 2009-10-01 | 2011-04-07 | 엘지전자 주식회사 | 무선랜 시스템에서의 데이터 전송방법 및 장치 |
KR101721293B1 (ko) * | 2013-12-31 | 2017-04-10 | 한국전자통신연구원 | 무선랜 시스템에서 채널을 추정하는 장치 및 방법 |
US11160039B2 (en) * | 2016-03-04 | 2021-10-26 | Huawei Technologies Co., Ltd.. | Frame structure to support long distance transmission |
CN111740768A (zh) * | 2019-03-25 | 2020-10-02 | 华为技术有限公司 | 一种通信方法及设备 |
US11038719B2 (en) * | 2019-04-30 | 2021-06-15 | Qualcomm Incorporated | Channel estimation for systems with PLL phase discontinuities |
Family Cites Families (13)
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US7492743B2 (en) * | 2002-09-30 | 2009-02-17 | Intel Corporation | Assigning training sequences based on spatial channels in a wireless communications system |
JP4259897B2 (ja) * | 2003-03-25 | 2009-04-30 | シャープ株式会社 | 無線データ伝送システム及び無線データ送受信装置 |
US7916803B2 (en) * | 2003-04-10 | 2011-03-29 | Qualcomm Incorporated | Modified preamble structure for IEEE 802.11a extensions to allow for coexistence and interoperability between 802.11a devices and higher data rate, MIMO or otherwise extended devices |
KR101168439B1 (ko) * | 2003-06-30 | 2012-07-25 | 에이저 시스템즈 인크 | 데이터 송신 방법, 데이터 수신 방법, 송신기 및 수신기 |
EP1645096A1 (en) * | 2003-06-30 | 2006-04-12 | Agere Systems Inc. | Methods and apparatus for backwards compatible communication in a multiple antenna communication system using fdm-based preamble structures |
US7039412B2 (en) * | 2003-08-08 | 2006-05-02 | Intel Corporation | Method and apparatus for transmitting wireless signals on multiple frequency channels in a frequency agile network |
US20050063298A1 (en) * | 2003-09-02 | 2005-03-24 | Qualcomm Incorporated | Synchronization in a broadcast OFDM system using time division multiplexed pilots |
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 |
HUE031812T2 (en) * | 2004-05-27 | 2017-08-28 | Qualcomm Inc | Modified prefix structure for IEEE 802.11A extensions to enable coexistence and interoperability between 802.11A devices and higher data rate, MIMO or otherwise extended devices |
JP4649895B2 (ja) | 2004-07-07 | 2011-03-16 | 東亞合成株式会社 | シーリング材組成物 |
CN101253720B (zh) * | 2005-02-08 | 2011-10-05 | 高通股份有限公司 | 允许波束形成和旧式设备共存的无线消息前同步码 |
JP4841256B2 (ja) * | 2005-06-28 | 2011-12-21 | 三洋電機株式会社 | 無線装置 |
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2006
- 2006-01-31 JP JP2006022169A patent/JP4841256B2/ja active Active
- 2006-06-28 US US11/476,140 patent/US8116389B2/en active Active
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2011
- 2011-08-11 JP JP2011176357A patent/JP2012005142A/ja active Pending
- 2011-11-21 US US13/301,533 patent/US8379744B2/en active Active
Also Published As
Publication number | Publication date |
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US8379744B2 (en) | 2013-02-19 |
US20060291373A1 (en) | 2006-12-28 |
US8116389B2 (en) | 2012-02-14 |
JP2012005142A (ja) | 2012-01-05 |
US20120128094A1 (en) | 2012-05-24 |
JP2007013919A (ja) | 2007-01-18 |
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