JP5514300B2 - 疎データからのチャネル状態情報の再構築 - Google Patents
疎データからのチャネル状態情報の再構築 Download PDFInfo
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- H—ELECTRICITY
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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
- 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
- H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
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- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/364—Delay profiles
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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
- H04B7/022—Site diversity; Macro-diversity
- H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [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
- H04B7/0615—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
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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
- H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
- H04B7/0689—Hybrid systems, i.e. switching and simultaneous transmission using different transmission schemes, at least one of them being a diversity transmission scheme
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- H—ELECTRICITY
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- 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
- H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
- H04L1/0019—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy in which mode-switching is based on a statistical approach
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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
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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
- H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
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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
- H04B7/0636—Feedback format
- H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
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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
- H04L25/0212—Channel estimation of impulse response
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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
- H04L25/022—Channel estimation of frequency response
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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
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Description
Claims (16)
- 無線通信ネットワークにおいてユーザ機器(UE)からのチャネル状態情報(CSI)のフィードバックを受信し処理する方法であって:
ダウンリンク通信チャネルの周波数応答を表現する複数の不均一な間隔を有するデジタルCSIフィードバックサンプルをUEから受信することと;
受信された前記CSIフィードバックサンプルを復調及び逆量子化することと;
受信された前記CSIフィードバックサンプルに最もよく適合する時間領域遅延値及び対応するチャネル係数のセットを探索することと;
前記時間領域遅延値を周波数変換して、周波数領域における前記ダウンリンク通信チャネルの再構築された周波数応答を取得することと;
を含み、
前記時間領域遅延値のセットを探索することは、セットのサイズが所定の閾値を下回る非ゼロの遅延値のセットを探索すること、又は、大きさの合計が所定の閾値を下回る遅延値のセットを探索することを含む、
方法。 - 前記ダウンリンク通信チャネルの前記再構築された周波数応答に基づいて、適応変調及び符号化を実行すること、をさらに含む、請求項1の方法。
- 前記時間領域遅延値を周波数変換することは、前記時間領域遅延値に高速フーリエ変換を適用することを含む、請求項1の方法。
- 時間領域の遅延のレンジは、ダウンリンクデータシンボルに付加されるサイクリックプレフィクスの長さと少なくとも同等である、請求項1の方法。
- 時間領域遅延値のセットを探索することは、前回推定された遅延の周囲のウィンドウにわたって探索することを含む、請求項1の方法。
- 時間領域遅延値のセットを探索することは、前記UEからのアップリンクチャネルにおける時間領域遅延値を探索することを含む、請求項1の方法。
- 前記時間領域遅延値のセットを探索することは、
既知のリファレンス信号を前記UEから受信することと;
UEの各送信アンテナとネットワークの各受信アンテナとの間の各チャネルについての遅延のセットを推定することと;
各チャネルについて、前記推定されたアップリンクの遅延に基づいて遅延ウィンドウを定義することと;
各チャネルについて、前記遅延ウィンドウの範囲内で時間領域遅延値を探索することと;
を含む、請求項1の方法。 - 各チャネルについて前記遅延ウィンドウの範囲内で時間領域遅延値を探索することは、ある基地局に位置する全ての送信アンテナについて時間領域遅延値の1つのセットのみを探索すること、をさらに含む、請求項7の方法。
- 前記方法のステップ群を定期的に繰り返すことをさらに含む、請求項1の方法。
- 前記UEからのCSIレポートを受信する時点の間の前記ダウンリンク通信チャネルの推定値を予測すること、をさらに含む、請求項9の方法。
- 前記ダウンリンク通信チャネルの推定値を予測することは、前記ダウンリンク通信チャネルの以前に計算された推定値を予測推定値として使用すること、を含む、請求項10の方法。
- 前記ダウンリンク通信チャネルの前記以前に計算された推定値は、直前に計算された推定値である、請求項11の方法。
- 前記ダウンリンク通信チャネルの推定値を予測することは、以前に計算されたチャネルの推定値の線型結合を予測チャネル値として計算すること、を含む、請求項12の方法。
- 前記ダウンリンク通信チャネルの推定値を予測することは、2回以上のCSIレポートにわたっての最小のMSEチャネル再構築誤差を導く、各遅延値についてのカルマンフィルタ係数を選択すること、を含む、請求項10の方法。
- 前記遅延値は固定されており、再構築されるチャネル推定値のベクトルは、前記カルマンフィルタ係数の線型関数である、請求項14の方法。
- チャネルタップの時間にわたる漸進的変化は、白色雑音により駆動される線型的で時間不変的なシステムの出力としてモデル化される、請求項15の方法。
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
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US17248409P | 2009-04-24 | 2009-04-24 | |
US61/172,484 | 2009-04-24 | ||
US12/555,973 | 2009-09-09 | ||
US12/555,973 US8923110B2 (en) | 2009-04-24 | 2009-09-09 | Channel state information reconstruction from sparse data |
PCT/IB2010/051808 WO2010122536A2 (en) | 2009-04-24 | 2010-04-23 | Channel state information reconstruction from sparse data |
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JP2012525053A JP2012525053A (ja) | 2012-10-18 |
JP5514300B2 true JP5514300B2 (ja) | 2014-06-04 |
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JP2012506631A Active JP5514300B2 (ja) | 2009-04-24 | 2010-04-23 | 疎データからのチャネル状態情報の再構築 |
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US (3) | US8923110B2 (ja) |
EP (2) | EP2422455B1 (ja) |
JP (1) | JP5514300B2 (ja) |
KR (1) | KR101647171B1 (ja) |
CN (2) | CN102415002B (ja) |
CA (1) | CA2759845C (ja) |
DK (1) | DK2422455T3 (ja) |
HK (1) | HK1165121A1 (ja) |
MX (1) | MX2011010720A (ja) |
WO (2) | WO2010122535A2 (ja) |
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KR20050081528A (ko) * | 2004-02-14 | 2005-08-19 | 삼성전자주식회사 | 다중반송파 통신시스템을 위한 채널 상태정보 피드백 방법 |
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KR101288297B1 (ko) * | 2006-12-07 | 2013-07-26 | 삼성전자주식회사 | 통신 시스템에서의 채널상태정보 궤환 방법 및 장치 |
US20080187061A1 (en) * | 2007-02-07 | 2008-08-07 | Texas Instruments Incorporated | Systems and methods for reconstructing steering matrices in a mimo-ofdm system |
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US20100272074A1 (en) | 2010-10-28 |
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WO2010122536A2 (en) | 2010-10-28 |
EP2422456B1 (en) | 2017-09-27 |
US20120188972A1 (en) | 2012-07-26 |
CN102415002B (zh) | 2015-06-03 |
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US8923110B2 (en) | 2014-12-30 |
CN102415003A (zh) | 2012-04-11 |
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