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 PDF

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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
Application number
PCT/KR2009/003610
Other languages
French (fr)
Other versions
WO2010002201A2 (en
Inventor
Lei Zhou
Zheng Zhao
Zongchuang Liang
Original Assignee
Samsung Electronics Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Samsung Electronics Co., Ltd. filed Critical Samsung Electronics Co., Ltd.
Publication of WO2010002201A2 publication Critical patent/WO2010002201A2/en
Publication of WO2010002201A3 publication Critical patent/WO2010002201A3/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413MIMO systems
    • H04B7/0417Feedback systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity 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
    • H04B7/0615Diversity 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
    • H04B7/0619Diversity 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
    • H04B7/0621Feedback content
    • H04B7/0626Channel coefficients, e.g. channel state information [CSI]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2602Signal structure
    • H04L27/261Details of reference signals
    • H04L27/2613Structure of the reference signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026Transmission 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.
PCT/KR2009/003610 2008-07-03 2009-07-02 Pre-coding method and apparatus based on uplink sounding and csi feedback channel information WO2010002201A2 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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