JP4290220B2 - 無線lan用無線装置 - Google Patents
無線lan用無線装置 Download PDFInfo
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- JP4290220B2 JP4290220B2 JP2008302066A JP2008302066A JP4290220B2 JP 4290220 B2 JP4290220 B2 JP 4290220B2 JP 2008302066 A JP2008302066 A JP 2008302066A JP 2008302066 A JP2008302066 A JP 2008302066A JP 4290220 B2 JP4290220 B2 JP 4290220B2
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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
- H04B7/0413—MIMO systems
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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
- 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
- H04L27/2613—Structure of the reference 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
- H04L27/261—Details of reference signals
- H04L27/2613—Structure of the reference signals
- H04L27/26132—Structure of the reference signals using repetition
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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
- H04L27/2626—Arrangements specific to the transmitter only
-
- 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
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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
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0058—Allocation criteria
- H04L5/0064—Rate requirement of the data, e.g. scalable bandwidth, data priority
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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
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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
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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
- H04L25/0204—Channel estimation of multiple 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
- H04L25/0226—Channel estimation using sounding signals sounding signals per se
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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
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2662—Symbol synchronisation
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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 (2)
- 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LAN用無線装置であって、
複数の系列のうちの少なくともひとつに配置した第1既知信号と、第1既知信号の後段にて、複数の系列のそれぞれに配置した第2既知信号と、第2既知信号の後段にて、第1既知信号と同一の系列に配置したデータ信号が含まれた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、第2既知信号が配置された系列数よりも、第1既知信号およびデータ信号が配置された系列数を少なくし、データ信号が配置される系列のうちのひとつに配置された第2既知信号を基準として、データ信号が配置される系列のうちの他の系列に配置された第2既知信号に、第2既知信号内での循環的なタイミングシフトを行い、データ信号が配置されない系列に配置された第2既知信号に対してもタイミングシフトを行っており、かつタイミングシフト量には予め優先度を設けており、データ信号が配置される系列に対して、優先度の高いタイミングシフト量から順にタイミングシフト量を使用し、データ信号が配置されない系列に対しても、優先度の高いタイミングシフト量から順にタイミングシフト量を使用し、
前記生成部において、第2既知信号は、時間領域において所定の単位が繰り返されることによって形成されており、かつ所定の単位の符号の組合せは、系列間において直交関係が成立するように規定されておりながら、所定の単位の符号の組合せには予め優先度を設けており、データ信号が配置される系列に対して、優先度の高い符号の組合せから順に符号の組合せを使用し、データ信号が配置されない系列に対しても、優先度の高い符号の組合せから順に符号の組合せを使用することを特徴とする無線LAN用無線装置。 - 前記生成部は、データ信号に対しても循環的なタイミングシフトを行っており、タイミングシフト量として、データ信号が配置される系列に対するタイミングシフト量を使用することを特徴とする請求項1に記載の無線LAN用無線装置。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US71692605P | 2005-09-15 | 2005-09-15 |
Related Parent Applications (1)
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JP2007145819A Division JP4290210B2 (ja) | 2005-09-15 | 2007-05-31 | 無線装置 |
Publications (2)
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JP2009055642A JP2009055642A (ja) | 2009-03-12 |
JP4290220B2 true JP4290220B2 (ja) | 2009-07-01 |
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Family Applications (6)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2006178042A Active JP3989512B2 (ja) | 2005-09-15 | 2006-06-28 | 無線装置 |
JP2007145819A Active JP4290210B2 (ja) | 2005-09-15 | 2007-05-31 | 無線装置 |
JP2008272402A Active JP4290218B2 (ja) | 2005-09-15 | 2008-10-22 | 無線lan用無線装置 |
JP2008302066A Active JP4290220B2 (ja) | 2005-09-15 | 2008-11-27 | 無線lan用無線装置 |
JP2009026157A Active JP4884488B2 (ja) | 2005-09-15 | 2009-02-06 | 無線lan用無線装置 |
JP2011226732A Active JP5361972B2 (ja) | 2005-09-15 | 2011-10-14 | 無線lan用無線装置 |
Family Applications Before (3)
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JP2006178042A Active JP3989512B2 (ja) | 2005-09-15 | 2006-06-28 | 無線装置 |
JP2007145819A Active JP4290210B2 (ja) | 2005-09-15 | 2007-05-31 | 無線装置 |
JP2008272402A Active JP4290218B2 (ja) | 2005-09-15 | 2008-10-22 | 無線lan用無線装置 |
Family Applications After (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2009026157A Active JP4884488B2 (ja) | 2005-09-15 | 2009-02-06 | 無線lan用無線装置 |
JP2011226732A Active JP5361972B2 (ja) | 2005-09-15 | 2011-10-14 | 無線lan用無線装置 |
Country Status (8)
Country | Link |
---|---|
US (3) | US7899413B2 (ja) |
EP (1) | EP1925104B1 (ja) |
JP (6) | JP3989512B2 (ja) |
KR (2) | KR101124122B1 (ja) |
CN (2) | CN101107792B (ja) |
DE (1) | DE602006019279D1 (ja) |
TW (2) | TWI422176B (ja) |
WO (1) | WO2007032413A1 (ja) |
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