JP2008512951A - Mimoシステムにおける閉ループフィードバック - Google Patents
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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
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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
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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
- H04B7/0634—Antenna weights or vector/matrix coefficients
-
- 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
- H04B7/0602—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 antenna switching
- H04B7/0608—Antenna selection according to transmission parameters
- H04B7/061—Antenna selection according to transmission parameters using feedback from receiving side
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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
- H04B7/0658—Feedback reduction
- H04B7/0663—Feedback reduction using vector or matrix manipulations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/28—Cell structures using beam steering
-
- 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
- H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
-
- 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
-
- 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
- H04B7/0617—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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Abstract
【選択図】図2
Description
任意の2×2複素行列は以下のように書き表すことができる。
任意の複素単位3ベクトルは以下のように書き表すことができる。
Claims (28)
- ビーム形成行列から位相情報を因数分解すること、及び
該位相情報のない前記ビーム形成行列を記述する少なくとも1つのパラメータを送信すること
を含む、方法。 - 前記ビーム形成行列から位相情報を因数分解することは、前記ビーム形成行列内の各列から位相角を因数分解することを含む、請求項1に記載の方法。
- 前記送信することは、N2−N個のパラメータを送信することを含み、ただし、Nは前記ビーム形成行列の次元を表す、請求項2に記載の方法。
- 前記ビーム形成行列の各行からの付加的な位相情報を因数分解することであって、それによって、位相行列及び大きさ行列を生成する、因数分解することをさらに含む、請求項2に記載の方法。
- 前記送信することは、前記位相行列を表すための少なくとも1つのパラメータを送信すること、及び、前記大きさ行列を表すための少なくとも1つのパラメータを送信することを含む、請求項4に記載の方法。
- 前記ビーム形成行列は、2つの行及び2つの列を含み、
前記位相行列を表すための前記少なくとも1つのパラメータは第1のパラメータから成り、
前記大きさ行列を表すための前記少なくとも1つのパラメータは第2のパラメータから成る、請求項5に記載の方法。 - 前記第1のパラメータは角度から成る、請求項6に記載の方法。
- 前記第1のパラメータは角度の関数から成る、請求項6に記載の方法。
- 2×2ビーム形成行列を複数の行列に因数分解することであって、該複数の行列の第1の行列は、該ビーム形成行列からの大きさ情報を含む成分を有する、因数分解すること、及び
前記複数の行列のうちの前記第1の行列を第1のパラメータで表すこと
を含む、方法。 - 前記複数の行列は位相情報を有する2つの行列をさらに含み、前記2つの行列のうちの一方の行列は、第2のパラメータによって表され、前記2つの行列のうちの他方の行列は破棄される、請求項9に記載の方法。
- 前記第1のパラメータは角度を含む、請求項10に記載の方法。
- 前記第1のパラメータは角度の三角関数を含む、請求項10に記載の方法。
- 3×3ビーム形成行列の各列からの位相角を因数分解すること、及び
6つのパラメータを用いて前記ビーム形成行列を表すこと
を含む、方法。 - 無線リンク上で前記6つのパラメータを送信することをさらに含む、請求項13に記載の方法。
- 前記3×3ビーム形成行列の各行からの位相情報を因数分解することをさらに含む、請求項13に記載の方法。
- 前記6つのパラメータのうちの2つは、各行から因数分解される前記位相情報を表すように選択される、請求項15に記載の方法。
- 少なくとも1つの角度パラメータを受信すること、
該少なくとも1つの角度パラメータから、ビーム形成行列内の成分の大きさを求めること、
少なくとも1つの位相パラメータを受信すること、及び
前記ビーム形成行列内の少なくとも1つの行に前記少なくとも1つの位相パラメータを適用すること
を含む、方法。 - 前記ビーム形成行列は2つの行及び2つの列を含み、
前記少なくとも1つの角度パラメータは1つの角度パラメータから成り、
前記少なくとも1つの位相パラメータは1つの位相パラメータから成る、請求項17に記載の方法。 - 前記ビーム形成行列は3つの行及び3つの列を含み、
前記少なくとも1つの角度パラメータは4つの角度パラメータから成り、
前記少なくとも1つの位相パラメータは2つの位相パラメータから成る、請求項17に記載の方法。 - 製品であって、
命令を保持するようになっている機械読取り可能媒体を含み、前記命令がアクセスされる結果として、機械が、ビーム形成行列から位相情報を因数分解し、前記位相情報のない、前記ビーム形成行列を記述する少なくとも1つのパラメータを送信する、製品。 - 前記ビーム形成行列から位相情報を因数分解することは、前記ビーム形成行列内の各列から位相角を因数分解することを含む、請求項20に記載の製品。
- 前記ビーム形成行列の各行からの付加的な位相情報を因数分解することであって、それによって、位相行列及び大きさ行列を生成する、因数分解することをさらに含む、請求項20に記載の製品。
- 前記送信することは、前記位相行列を表すための少なくとも1つのパラメータを送信すること、及び、前記大きさ行列を表すための少なくとも1つのパラメータを送信することを含む、請求項22に記載の製品。
- 前記ビーム形成行列は、2つの行及び2つの列を含み、
前記位相行列を表すための前記少なくとも1つのパラメータは第1のパラメータから成り、
前記大きさ行列を表すための前記少なくとも1つのパラメータは第2のパラメータから成る、請求項23に記載の製品。 - 前記ビーム形成行列は、3つの行及び3つの列を含み、
前記位相行列を表すための前記少なくとも1つのパラメータは2つのパラメータから成り、
前記大きさ行列を表すための前記少なくとも1つのパラメータは4つのパラメータから成る、請求項23に記載の製品。 - 電子システムであって、
N個のアンテナと、
該N個のアンテナに接続されるプロセッサと、
イーサネットインターフェースと、
命令を保持するようになっている機械読取り可能媒体を有する製品と
を備え、前記命令がアクセスされる結果として、前記プロセッサが、N個の空間チャネルのためのチャネル状態情報を推定し、N×Nビーム形成行列の各列から位相角を因数分解し、N2−N個のパラメータを用いて、前記位相角のない前記ビーム形成行列を表現する、電子システム。 - N=2であり、前記N2−N個のパラメータは、位相を記述するための1つのパラメータと、大きさを記述するための1つのパラメータとを含む、請求項26に記載の電子システム。
- N=3であり、前記N2−N個のパラメータは、位相を記述するための2つのパラメータと、大きさを記述するための4つのパラメータとを含む、請求項26に記載の電子システム。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/939,130 US7492829B2 (en) | 2004-09-10 | 2004-09-10 | Closed loop feedback in MIMO systems |
PCT/US2005/031510 WO2006041595A1 (en) | 2004-09-10 | 2005-09-02 | Method and system for closed loop transmit beamforming in mimo systems with limited feedback |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2008512951A true JP2008512951A (ja) | 2008-04-24 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007531244A Pending JP2008512951A (ja) | 2004-09-10 | 2005-09-02 | Mimoシステムにおける閉ループフィードバック |
Country Status (8)
Country | Link |
---|---|
US (2) | US7492829B2 (ja) |
JP (1) | JP2008512951A (ja) |
KR (1) | KR100898632B1 (ja) |
CN (2) | CN102364883B (ja) |
DE (1) | DE112005002205B4 (ja) |
GB (2) | GB2455005B (ja) |
TW (1) | TWI294227B (ja) |
WO (1) | WO2006041595A1 (ja) |
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KR100898632B1 (ko) | 2009-05-21 |
US20060056335A1 (en) | 2006-03-16 |
GB2432489A (en) | 2007-05-23 |
WO2006041595A1 (en) | 2006-04-20 |
DE112005002205B4 (de) | 2014-11-13 |
CN101019342A (zh) | 2007-08-15 |
DE112005002205T5 (de) | 2009-03-12 |
US7492829B2 (en) | 2009-02-17 |
TW200623679A (en) | 2006-07-01 |
TWI294227B (en) | 2008-03-01 |
GB0903596D0 (en) | 2009-04-08 |
CN102364883A (zh) | 2012-02-29 |
GB2432489A8 (en) | 2007-06-05 |
US8165241B2 (en) | 2012-04-24 |
KR20070046921A (ko) | 2007-05-03 |
GB2455005B (en) | 2009-10-14 |
GB0700222D0 (en) | 2007-02-14 |
CN101019342B (zh) | 2012-01-18 |
GB2432489B (en) | 2009-05-27 |
CN102364883B (zh) | 2014-10-29 |
GB2455005A (en) | 2009-05-27 |
US20090147881A1 (en) | 2009-06-11 |
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