JP2011508527A - Mimoシステムにおけるビームフォーミング - Google Patents
Mimoシステムにおけるビームフォーミング Download PDFInfo
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- 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
- H04B7/0617—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 for beam forming
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- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/7163—Spread spectrum techniques using impulse radio
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- 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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- 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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- 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
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- 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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Abstract
Description
Pn=c2 HH1→2(n)w1
によって与えられる、周波数ビンn=0,1,...,N−1における周波数応答を有する。離散周波数受信信号モデルは、
Yn=PnSn+Bn
であり、[S0,S1,...,SN]は、OFDMデータシンボル(またはSCデータバーストのFFT)であり、[B0,B1,...,BN]は、加法性ホワイトガウスノイズベクトルである。
Qn=c2 HH2→1(n)w2
によって与えられる。OFDMとSCの両方について、n番目のサブキャリア上の信号対雑音比(SNR)は、
Claims (25)
- 第1のトランシーバと第2のトランシーバとの間のビームフォーミング方法であって、
少なくともビームフォーミングコードブックのサブセットを使用する信号を前記第1のトランシーバから前記第2のトランシーバに送信することによってチャネル状態情報(CSI)を収集することと、前記CSIを収集するために少なくとも結合コードブックのサブセットを使用するように前記第2のトランシーバを構成することと、
推定された最適ビームフォーミングベクトルと推定された最適結合ベクトルとを生成するために前記CSIからの最適ビームフォーミングベクトルと最適結合ベクトルとを推定することと、
少なくとも前記推定された最適ビームフォーミングベクトルと前記推定された最適結合ベクトルとのうちの1つを前記第1のトランシーバに送信することと
を備える方法。 - 推定することが最適性基準のセットの少なくとも1つの最適性基準を使用し、前記セットが実効信号対雑音比(SNR)と平均SNRとを備える、請求項1に記載の方法。
- 前記CSIを収集するために使用されたレートよりも低いレートで前記ビームフォーミングコードブックの前記サブセットを送信することによって前記CSIが収集された後、前記CSIの更新を行うことと、前記推定ステップおよび前記送信ステップを反復することとをさらに備える、請求項1に記載の方法。
- 前記ビームフォーミングコードブックおよび前記結合コードブックが、重みベクトルのセットのうちの少なくとも1つを備え、前記セットが、少なくとも1つの2進重みベクトルと、少なくとも1つのクアドラチュア重みベクトルとを備える、請求項1に記載の方法。
- 前記ビームフォーミングコードブックおよび前記結合コードブックが、コードブックのセットのうちの少なくとも1つを備え、前記セットが、擬似オムニコードブックと相補Golayコードブックとを備える、請求項1に記載の方法。
- 請求項1に記載の方法を実行するように構成されたピコネットコントローラ。
- 請求項1に記載の方法を実行するように構成された、ピコネット中の加入者デバイス。
- ビームフォーミング重みと結合重みとを選択するために第1のトランシーバと少なくとも第2のトランシーバとの間でシグナリングするためのフレームフォーマットを使用するための方法であって、
前記第1のトランシーバから前記第2のトランシーバに信号を送信することであって、前記信号が複数の送信セグメントを備え、前記複数の送信セグメントの各々が、所定のビームフォーミングコードブックからの異なるビームパターンを用いて送信される、送信することと、
前記少なくとも第2のトランシーバからのフィードバックをリッスンすることと、
前記少なくとも第2のトランシーバからのフィードバックに基づいてセットのうちの少なくとも1つのベクトルを選択することであって、前記セットが、ビームフォーミング重みと結合重みとのうちの少なくとも1つを備える、選択することと
を備える方法。 - 前記信号を送信することが、擬似オムニセクションと指向性セクションのとのうちの少なくとも1つを送信することを備える、請求項8に記載の方法。
- プロアクティブビームフォーミングとオンデマンドビームフォーミングとのうちの少なくとも1つを実行するようにさらに構成された、請求項8に記載の方法。
- 前記所定のビームフォーミングコードブックが、擬似オムニコードブックと相補Golayコードブックとのうちの少なくとも1つを備える、請求項8に記載の方法。
- 前記所定のビームフォーミングコードブックが、擬似オムニコードブックと相補Golayコードブックとのうちの少なくとも1つのサブセットを備える、請求項8に記載の方法。
- リッスンすることが、複数のリスニングセグメントにわたってリッスンするために複数の結合ベクトルを使用することを備え、前記複数の結合ベクトルが前記ビームフォーミングコードブックのベクトルであり、前記複数の結合ベクトルの各々が、前記複数の送信セグメントの各々に対応する、請求項8に記載の方法。
- 前記信号が、擬似オムニサブビーコンと指向性トレーニングシーケンスとのうちの少なくとも1つを備える、請求項8に記載の方法。
- 請求項8に記載の方法を実行するように構成されたピコネットコントローラ。
- アンテナアレイを備える第2のトランシーバに通信可能に結合されたアンテナアレイを備える少なくとも第1のトランシーバのためにビームフォーミング重みと結合重みとを選択するための方法であって、
前記第1のワイヤレストランシーバによって送信された信号を前記第2のトランシーバにおいて受信することであって、前記信号が複数の送信セグメントを備え、前記複数の送信セグメントの各々が、所定のビームフォーミングコードブックからの異なるビームパターンを用いて送信される、受信することと、
少なくとも前記複数の送信セグメントのサブセットから前記第1のトランシーバの好適ビームフォーミングベクトルを推定することと、
前記第2のトランシーバの好適結合ベクトルを推定することと、
リスニング期間中に前記好適ビームフォーミングベクトルと前記好適結合ベクトルとのうちの少なくとも1つを前記第1のトランシーバに送信することと
を備える方法。 - 前記好適ビームフォーミングベクトルを推定することと、前記好適結合ベクトルを推定することとのうちの少なくとも1つが、チャネル状態情報を収集することと、リンク品質インジケータを計算することとのうちの少なくとも1つを備える、請求項16に記載の方法。
- 前記好適結合ベクトルを推定することが、複数の整合フィルタ出力を生成するために前記信号を複数のGolayシーケンスと相関させることと、チャネル推定値を生成するために前記整合フィルタ出力を結合することを備える、請求項16に記載の方法。
- 前記リスニング期間が、複数のリスニング期間セグメントを備え、前記複数のリスニング期間セグメントの各々が前記複数の送信セグメントの1つに対応し、送信することが、前記推定された好適ビームフォーミングベクトルに対応する前記送信セグメントの特定の1つに対応する前記複数のリスニング期間セグメントの特定の1つを選択するようにさらに構成された、請求項16に記載の方法。
- プロアクティブビームフォーミングとオンデマンドビームフォーミングとのうちの少なくとも1つを実行するように構成された、請求項16に記載の方法。
- 前記信号が、擬似オムニサブビーコンと指向性トレーニングシーケンスとのうちの少なくとも1つを備える、請求項16に記載の方法。
- 前記好適ビームフォーミングベクトルを推定することが、前記第1のトランシーバに対応する制約の第1のセットを使用し、前記好適結合ベクトルを推定することが、前記第2のトランシーバに対応する制約の第2のセットを使用する、請求項16に記載の方法。
- 前記好適ビームフォーミングベクトルおよび前記好適結合ベクトルが、複数の位相と複数の振幅とのうちの少なくとも1つを備える、請求項16に記載の方法。
- 前記第1のトランシーバの前記アンテナアレイと前記第2のトランシーバの前記アンテナアレイとのうちの少なくとも1つが複数のアンテナを備え、前記複数のアンテナの各々が異なる偏波を有する、請求項16に記載の方法。
- 請求項16に記載の方法を実行するように構成された、ピコネット中で動作する加入者デバイス。
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Application Number | Priority Date | Filing Date | Title |
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US11/960,234 | 2007-12-19 | ||
US11/960,234 US7916081B2 (en) | 2007-12-19 | 2007-12-19 | Beamforming in MIMO systems |
PCT/US2008/087094 WO2009085792A1 (en) | 2007-12-19 | 2008-12-17 | Beamforming in mimo systems |
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JP2011508527A true JP2011508527A (ja) | 2011-03-10 |
JP5242700B2 JP5242700B2 (ja) | 2013-07-24 |
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JP2010539723A Active JP5242700B2 (ja) | 2007-12-19 | 2008-12-17 | Mimoシステムにおけるビームフォーミング |
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US (1) | US7916081B2 (ja) |
EP (1) | EP2243226B1 (ja) |
JP (1) | JP5242700B2 (ja) |
KR (2) | KR101244770B1 (ja) |
CN (1) | CN101904109B (ja) |
ES (1) | ES2417604T3 (ja) |
TW (1) | TW200935791A (ja) |
WO (1) | WO2009085792A1 (ja) |
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EP2243226A1 (en) | 2010-10-27 |
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US20090160707A1 (en) | 2009-06-25 |
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