KR20080039768A - 무선 패킷 데이터 통신 시스템에서의 피드백 정보 송수신방법 및 장치 - Google Patents
무선 패킷 데이터 통신 시스템에서의 피드백 정보 송수신방법 및 장치 Download PDFInfo
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- 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
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- H04B7/0417—Feedback systems
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- 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
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- 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
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- 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
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- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
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- H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
- H04L1/0039—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver other detection of signalling, e.g. detection of TFCI explicit signalling
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- 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
- H04L25/0222—Estimation of channel variability, e.g. coherence bandwidth, coherence time, fading frequency
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- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2626—Arrangements specific to the transmitter only
- H04L27/2646—Arrangements specific to the transmitter only using feedback from receiver for adjusting OFDM transmission parameters, e.g. transmission timing or guard interval length
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- H04W—WIRELESS COMMUNICATION NETWORKS
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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
- H04B7/0452—Multi-user MIMO systems
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- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
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- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L2025/0335—Arrangements for removing intersymbol interference characterised by the type of transmission
- H04L2025/03426—Arrangements for removing intersymbol interference characterised by the type of transmission transmission using multiple-input and multiple-output channels
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- 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
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L2025/03777—Arrangements for removing intersymbol interference characterised by the signalling
- H04L2025/03802—Signalling on the reverse channel
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
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- H04L25/0204—Channel estimation of multiple channels
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
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- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
- H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
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Abstract
Description
Claims (4)
- 단일 사용자 다중 입출력(Multiple Input Multiple Output : MIMO)모드와 다중 사용자 MIMO 모드를 지원하는 무선 패킷 데이터 통신 시스템에서의 기지국에서 피드백 정보를 운영하는 방법에 있어서,상기 단일 사용자 MIMO모드와 다중 사용자 MIMO모드중 기본 MIMO 모드를 설정하여 단말로 전송하는 과정과,소정 단말로부터 상기 설정된 기본 MIMO모드에 따른 제 1피드백 정보와, 상기 기본 MIMO모드이외의 MIMO모드에 따른 제 2피드백 정보를 수신하는 과정과,상기 기본 MIMO모드에 따라 적어도 하나의 단말에게 상기 수신된 피드백 정보들을 이용하여 데이터를 스케줄링하여 전송하는 과정을 포함하며,여기서 상기 제 2피드백 정보는 상기 제 1피드백 정보를 근거로 계산된 값임을 특징으로 하는 피드백 정보 운영 방법.
- 단일 사용자 다중 입출력(Multiple Input Multiple Output : MIMO)모드와 다중 사용자 MIMO 모드를 지원하는 무선 패킷 데이터 통신 시스템에서의 기지국에 있어서,소정 단말로부터 상기 단일 사용자 MIMO모드와 다중 사용자 MIMO모드중 미리 설정된 기본 MIMO모드에 따른 제 1피드백 정보와, 상기 기본 MIMO모드이외의 MIMO 모드에 따른 제 2피드백 정보를 수신하는 적어도 하나의 피드백 신호 수신기와,상기 수신된 피드백 정보를 근거로 채널 정보를 계산하는 채널 정보 계산부와,상기 기본 MIMO모드에 따른 채널 정보를 계산하기 위해 상기 채널 정보 계산부를 제어하는 제어부와,상기 계산된 채널 품질 정보를 근거로 적어도 하나의 단말에게 상기 계산된 채널 정보를 이용하여 데이터를 스케줄링하여 전송하는 스케줄러를 포함하며,여기서 상기 제 2피드백 정보는 상기 제 1피드백 정보를 근거로 계산된 값임을 특징으로 하는 기지국.
- 단일 사용자 다중 입출력(Multiple Input Multiple Output : MIMO)모드와 다중 사용자 MIMO 모드를 지원하는 무선 패킷 데이터 통신 시스템에서의 단말에서 피드백 정보를 전송하는 방법에 있어서,기지국으로부터 상기 단일 사용자 MIMO 모드와 다중 사용자 MIMO 모드중 미리 결정된 기본 MIMO모드를 수신하는 과정과,상기 설정된 기본 MIMO모드에 따른 제 1피드백 정보와, 상기 기본 MIMO모드이외의 MIMO모드에 따른 제 2피드백 정보를 추정하는 과정을 포함하며,여기서 상기 제 2피드백 정보는 상기 제 1피드백 정보를 근거로 계산된 값 함을 특징으로 하는 피드백 정보 전송 방법.
- 단일 사용자 다중 입출력(Multiple Input Multiple Output : MIMO)모드와 다중 사용자 MIMO 모드를 지원하는 무선 패킷 데이터 통신 시스템에서의 단말에 있어서,기지국으로부터 수신된 파일럿을 이용하여 상기 단일 사용자 MIMO모드와 상기 다중 사용자 MIMO 모드에 대한 채널을 추정하는 채널 추정기와,상기 추정된 채널을 근거로 상기 단일 사용자 MIMO모드와 상기 다중 사용자 MIMO 모드에 따른 채널 정보를 계산하는 피드백 정보 예측기와,상기 기지국으로부터 전송된 상기 단일 사용자 MIMO모드와 상기 다중 사용자 MIMO 모드중 기본 MIMO모드에 따른 제 1피드백 정보와 상기 기본 MIMO모드이외의 MIMO모드에 따른 제 2피드백 정보를 생성하는 피드백 신호 발생기와,상기 기본 MIMO모드에 따라 상기 피드백 신호 발생기를 제어하는 제어기를 포함함을 특징으로 하는 단말.
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KR1020060107500A KR100938088B1 (ko) | 2006-11-01 | 2006-11-01 | 무선 패킷 데이터 통신 시스템에서의 피드백 정보 송수신방법 및 장치 |
PCT/KR2007/005444 WO2008054140A1 (en) | 2006-11-01 | 2007-10-31 | Method and apparatus for transmitting/receiving feedback information in a wireless packet data communication system |
EP07833752.4A EP2078345B1 (en) | 2006-11-01 | 2007-10-31 | Method and apparatus for transmitting/receiving feedback information in a wireless packet data communication system |
US11/933,974 US9083412B2 (en) | 2006-11-01 | 2007-11-01 | Method and apparatus for transmitting/receiving feedback information in a wireless packet data communication system |
US14/797,795 US10084514B2 (en) | 2006-11-01 | 2015-07-13 | Method and apparatus for transmitting/receiving feedback information in a wireless packet data communication system |
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EP2078345B1 (en) | 2020-07-08 |
US10084514B2 (en) | 2018-09-25 |
EP2078345A1 (en) | 2009-07-15 |
US20150318906A1 (en) | 2015-11-05 |
WO2008054140A1 (en) | 2008-05-08 |
KR100938088B1 (ko) | 2010-01-21 |
EP2078345A4 (en) | 2013-11-06 |
US20080101498A1 (en) | 2008-05-01 |
US9083412B2 (en) | 2015-07-14 |
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