RU2010141988A - METHODS AND SYSTEMS FOR SELECTING CYCLIC DELAYS IN OFDM SYSTEMS WITH MANY ANTENNA - Google Patents
METHODS AND SYSTEMS FOR SELECTING CYCLIC DELAYS IN OFDM SYSTEMS WITH MANY ANTENNA Download PDFInfo
- Publication number
- RU2010141988A RU2010141988A RU2010141988/08A RU2010141988A RU2010141988A RU 2010141988 A RU2010141988 A RU 2010141988A RU 2010141988/08 A RU2010141988/08 A RU 2010141988/08A RU 2010141988 A RU2010141988 A RU 2010141988A RU 2010141988 A RU2010141988 A RU 2010141988A
- Authority
- RU
- Russia
- Prior art keywords
- pilot
- cyclic delay
- processing
- generating
- input samples
- Prior art date
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Classifications
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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
- 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
- H04L27/26134—Pilot insertion in the transmitter chain, e.g. pilot overlapping with data, insertion in time or frequency domain
-
- 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
-
- 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
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/024—Channel estimation channel estimation algorithms
- H04L25/0256—Channel estimation using minimum mean square error criteria
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Radio Transmission System (AREA)
- Mobile Radio Communication Systems (AREA)
- Transmitters (AREA)
Abstract
1. Способ передачи пилот-сигналов в системе беспроводной связи, содержащий: ! формирование первого пилот-сигнала для первой передающей антенны на основе первой циклической задержки; и ! формирование второго пилот-сигнала для второй передающей антенны на основе второй циклической задержки, большей чем первая циклическая задержка на, по меньшей мере, длину циклического префикса. ! 2. Способ по п.1, дополнительно содержащий: ! формирование третьего пилот-сигнала для третьей передающей антенны на основе третьей циклической задержки, большей чем вторая циклическая задержка на, по меньшей мере, длину циклического префикса. ! 3. Способ по п.1, в котором циклическая задержка для каждой передающей антенны равна ! , для m=0,1,..., M-1 ! где NC,0≥0, NC,i≥NCP i≥1, NCP является длиной циклического префикса, m является индексом передающей антенны и tm является циклической задержкой для передающей антенны m, m=0,1,...,M-1. ! 4. Способ по п.1, в котором первая циклическая задержка равна нулю, и вторая циклическая задержка равна либо больше, чем длина циклического префикса. ! 5. Способ по п.1, в котором первая и вторая циклические задержки не передаются с помощью сигнализации. ! 6. Способ по п.1, в котором формирование первого пилот-сигнала содержит: ! формирование первой последовательности выборок, содержащей первый пилот-сигнал; и ! циклическую задержку первой последовательности выборок на первую циклическую задержку; ! при этом формирование второго пилот-сигнала содержит формирование второй последовательности выборок, содержащей второй пилот-сигнал, и циклическую задержку второй последовательности выборок на вторую циклическую задержку. ! 7. Способ п� 1. A method for transmitting pilot signals in a wireless communication system, comprising: ! generating a first pilot for the first transmit antenna based on the first cyclic delay; And ! generating a second pilot for the second transmit antenna based on a second cyclic delay greater than the first cyclic delay by at least the length of the cyclic prefix. ! 2. The method according to claim 1, further comprising: ! generating a third pilot for the third transmit antenna based on a third cyclic delay greater than the second cyclic delay by at least the length of the cyclic prefix. ! 3. The method of claim 1, wherein the cyclic delay for each transmitting antenna is ! , for m=0,1,..., M-1 ! where NC,0≥0, NC,i≥NCP i≥1, NCP is the cyclic prefix length, m is the transmit antenna index and tm is the cyclic delay for transmit antenna m, m=0,1,...,M-1 . ! 4. The method of claim 1, wherein the first cyclic delay is zero and the second cyclic delay is equal to or greater than the length of the cyclic prefix. ! 5. The method of claim 1, wherein the first and second cyclic delays are not signaled. ! 6. The method of claim 1, wherein generating the first pilot signal comprises: ! generating a first sequence of samples comprising a first pilot signal; And ! cyclic delay of the first sequence of samples by the first cyclic delay; ! wherein generating the second pilot signal comprises generating a second sequence of samples comprising the second pilot signal and cyclically delaying the second sequence of samples by a second cyclic delay. ! 7. Method of application
Claims (88)
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US3689508P | 2008-03-14 | 2008-03-14 | |
US61/036,895 | 2008-03-14 | ||
US12/357,935 | 2009-01-22 | ||
US12/357,935 US8570939B2 (en) | 2008-03-07 | 2009-01-22 | Methods and systems for choosing cyclic delays in multiple antenna OFDM systems |
PCT/US2009/035196 WO2010011369A2 (en) | 2008-03-14 | 2009-02-25 | Methods and systems for choosing cyclic delays in multiple antenna ofdm systems |
Publications (2)
Publication Number | Publication Date |
---|---|
RU2010141988A true RU2010141988A (en) | 2012-04-20 |
RU2471298C2 RU2471298C2 (en) | 2012-12-27 |
Family
ID=41478800
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
RU2010141988/08A RU2471298C2 (en) | 2008-03-14 | 2009-02-25 | Methods and systems to select cyclic delays in ofdm systems with multiple antennas |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP2266247A2 (en) |
JP (1) | JP5579626B2 (en) |
KR (1) | KR101200510B1 (en) |
CN (2) | CN101939943A (en) |
BR (1) | BRPI0908916A2 (en) |
CA (1) | CA2714455C (en) |
RU (1) | RU2471298C2 (en) |
TW (1) | TWI482445B (en) |
WO (1) | WO2010011369A2 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100952336B1 (en) * | 2007-10-25 | 2010-04-09 | 에스케이 텔레콤주식회사 | Method and Server for Comparing Goods Based on Multi-Criteria |
KR101115442B1 (en) * | 2008-10-23 | 2012-02-21 | 에스케이플래닛 주식회사 | Method and Server for Comparing Commodities |
EP3515006B1 (en) | 2011-01-07 | 2020-08-12 | Sun Patent Trust | Integrated circuit, transmitter and transmission method |
CN103686830A (en) * | 2012-09-26 | 2014-03-26 | 电信科学技术研究院 | Method and device for measuring movement speed of terminal |
CN104506283B (en) * | 2014-11-10 | 2017-10-20 | 中国电子科技集团公司第二十研究所 | The circulation delay sending method of vectorial OFDM based on many transmission antennas |
KR101706629B1 (en) | 2016-01-25 | 2017-02-16 | 주식회사 이노와이어리스 | power calibration method for MIMO-OFDM transmitter |
US10063306B2 (en) * | 2016-10-24 | 2018-08-28 | Mitsubishi Electric Research Laboratories, Inc. | Method and systems using quasi-synchronous distributed CDD systems |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100291476B1 (en) * | 1998-05-25 | 2001-07-12 | 윤종용 | A method and a system for controlling a pilot measurement request order in cellular system |
US6546248B1 (en) * | 2000-02-10 | 2003-04-08 | Qualcomm, Incorporated | Method and apparatus for generating pilot strength measurement messages |
US7248559B2 (en) * | 2001-10-17 | 2007-07-24 | Nortel Networks Limited | Scattered pilot pattern and channel estimation method for MIMO-OFDM systems |
US8233555B2 (en) * | 2004-05-17 | 2012-07-31 | Qualcomm Incorporated | Time varying delay diversity of OFDM |
US8588203B2 (en) * | 2004-06-04 | 2013-11-19 | Qualcomm Incorporated | Wireless communication system with improved broadcast coverage |
KR100938091B1 (en) * | 2004-10-13 | 2010-01-21 | 삼성전자주식회사 | Apparatus and method for providing efficient transmission using block coding and cyclic delay diversities in the OFDM based cellular systems |
US9520972B2 (en) * | 2005-03-17 | 2016-12-13 | Qualcomm Incorporated | Pilot signal transmission for an orthogonal frequency division wireless communication system |
CN1838655A (en) * | 2005-03-24 | 2006-09-27 | 北京三星通信技术研究有限公司 | MIMO-OFDM receiver |
CA2625387A1 (en) * | 2005-11-04 | 2007-05-10 | Matsushita Electric Industrial Co. Ltd. | Radio transmitting apparatus, radio receiving apparatus, wireless communication method, and wireless communication system |
US7848438B2 (en) * | 2006-02-14 | 2010-12-07 | Motorola Mobility, Inc. | Method and apparatus for pilot signal transmission |
US8121105B2 (en) * | 2006-04-25 | 2012-02-21 | Nec Corporation | Pilot signal transmission method and radio communication apparatus |
JP2008048092A (en) * | 2006-08-14 | 2008-02-28 | Toshiba Corp | Radio transmission method using ofdm, transmitter and receiver |
-
2009
- 2009-02-25 CA CA2714455A patent/CA2714455C/en not_active Expired - Fee Related
- 2009-02-25 KR KR1020107022986A patent/KR101200510B1/en active IP Right Grant
- 2009-02-25 CN CN2009801046029A patent/CN101939943A/en active Pending
- 2009-02-25 BR BRPI0908916A patent/BRPI0908916A2/en not_active IP Right Cessation
- 2009-02-25 RU RU2010141988/08A patent/RU2471298C2/en not_active IP Right Cessation
- 2009-02-25 CN CN201611067209.5A patent/CN106506054A/en active Pending
- 2009-02-25 EP EP09752534A patent/EP2266247A2/en not_active Withdrawn
- 2009-02-25 WO PCT/US2009/035196 patent/WO2010011369A2/en active Application Filing
- 2009-02-25 JP JP2010550736A patent/JP5579626B2/en not_active Expired - Fee Related
- 2009-03-12 TW TW098108098A patent/TWI482445B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
TW201014234A (en) | 2010-04-01 |
WO2010011369A3 (en) | 2010-05-20 |
CN101939943A (en) | 2011-01-05 |
CA2714455C (en) | 2013-07-09 |
RU2471298C2 (en) | 2012-12-27 |
JP5579626B2 (en) | 2014-08-27 |
KR20100124329A (en) | 2010-11-26 |
CN106506054A (en) | 2017-03-15 |
CA2714455A1 (en) | 2010-01-28 |
JP2011517518A (en) | 2011-06-09 |
BRPI0908916A2 (en) | 2018-02-14 |
EP2266247A2 (en) | 2010-12-29 |
WO2010011369A2 (en) | 2010-01-28 |
KR101200510B1 (en) | 2012-11-13 |
TWI482445B (en) | 2015-04-21 |
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MM4A | The patent is invalid due to non-payment of fees |
Effective date: 20190226 |