WO2010002201A3 - Pre-coding method and apparatus based on uplink sounding and csi feedback channel information - Google Patents
Pre-coding method and apparatus based on uplink sounding and csi feedback channel information Download PDFInfo
- Publication number
- WO2010002201A3 WO2010002201A3 PCT/KR2009/003610 KR2009003610W WO2010002201A3 WO 2010002201 A3 WO2010002201 A3 WO 2010002201A3 KR 2009003610 W KR2009003610 W KR 2009003610W WO 2010002201 A3 WO2010002201 A3 WO 2010002201A3
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- receiver
- signal
- matrix
- uplink sounding
- antennas
- 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
- H04B7/0413—MIMO systems
- H04B7/0417—Feedback 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
- H04B7/0615—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
- H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
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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
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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
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
Abstract
A signal communication method for a TDD communication system is provided, comprising steps of: at a transmitter, coding and modulating information bits, multiplying the resulting signal with a pre-coding matrix V and allocating them to OFDM sub-carriers for transmitting via antennas allowable for transmission, wherein the pre-coding matrix V is obtained based on an uplink sounding signal and CSI channel feedback information for the remaining antennas from a receiver; and at the receiver, processing the received signal, estimating a channel matrix H based on a pilot, performing pre-decoding and demodulating based on the estimated matrix H and outputting the resulting information bits. According to the present invention, the problem that the transmitter can not obtain CSI for all transmitting antennas within one frame due to the difference of antenna configurations between the uplink and the downlink in a MIMO system. Meanwhile, the system performance can be improved and the feedback overhead and the complexity of the receiver can be reduced.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200810127499.7 | 2008-07-03 | ||
CN200810127499A CN101621309A (en) | 2008-07-03 | 2008-07-03 | Precoding method and device based on Uplink Sounding and CSI feedback channel information |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2010002201A2 WO2010002201A2 (en) | 2010-01-07 |
WO2010002201A3 true WO2010002201A3 (en) | 2010-04-15 |
Family
ID=41466475
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2009/003610 WO2010002201A2 (en) | 2008-07-03 | 2009-07-02 | Pre-coding method and apparatus based on uplink sounding and csi feedback channel information |
Country Status (2)
Country | Link |
---|---|
CN (1) | CN101621309A (en) |
WO (1) | WO2010002201A2 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102447502B (en) * | 2010-09-30 | 2015-03-11 | 日电(中国)有限公司 | Method and device for obtaining channel state information of beam forming |
EP2897409B1 (en) | 2014-01-17 | 2020-05-27 | Sony Corporation | Method for operating a base station comprising a plurality of antennas in a wireless radio network |
CN106817720B (en) * | 2015-11-27 | 2019-07-02 | 中兴通讯股份有限公司 | A kind of method and device obtaining channel information |
CN107222244B (en) | 2016-03-16 | 2020-10-23 | 华为技术有限公司 | Channel information reporting method, device and system |
CN112020092B (en) * | 2019-05-31 | 2022-05-24 | 华为技术有限公司 | Channel information acquisition method and device |
CN116827402B (en) * | 2023-08-29 | 2024-01-05 | 极芯通讯技术(南京)有限公司 | Method for forming downlink channel beam and related equipment |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070153731A1 (en) * | 2006-01-05 | 2007-07-05 | Nadav Fine | Varying size coefficients in a wireless local area network return channel |
US20070280340A1 (en) * | 2006-06-05 | 2007-12-06 | Samsung Electronics Co., Ltd. | Apparatus and method for uplink channel sounding in a wireless communication system |
US20080095223A1 (en) * | 2004-09-30 | 2008-04-24 | Wen Tong | Channel Sounding in Ofdma System |
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2008
- 2008-07-03 CN CN200810127499A patent/CN101621309A/en active Pending
-
2009
- 2009-07-02 WO PCT/KR2009/003610 patent/WO2010002201A2/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080095223A1 (en) * | 2004-09-30 | 2008-04-24 | Wen Tong | Channel Sounding in Ofdma System |
US20070153731A1 (en) * | 2006-01-05 | 2007-07-05 | Nadav Fine | Varying size coefficients in a wireless local area network return channel |
US20070280340A1 (en) * | 2006-06-05 | 2007-12-06 | Samsung Electronics Co., Ltd. | Apparatus and method for uplink channel sounding in a wireless communication system |
Non-Patent Citations (1)
Title |
---|
MAI VU ET AL.: "MIMO Wireless Linear Precoding", IEEE SIGNAL PROCESSING MAGAZ INE, September 2007 (2007-09-01), pages 86 - 105 * |
Also Published As
Publication number | Publication date |
---|---|
CN101621309A (en) | 2010-01-06 |
WO2010002201A2 (en) | 2010-01-07 |
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