JP2012516612A - 無線通信システムにおける参照信号送信装置及び方法 - Google Patents
無線通信システムにおける参照信号送信装置及び方法 Download PDFInfo
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- H04L5/00—Arrangements affording multiple use of the transmission path
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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
- 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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- 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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- 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
- H04B7/0684—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 using different training sequences per antenna
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Abstract
【解決手段】前記装置は、N個のアンテナ、及び前記N個のアンテナと連結され、各々のK個の参照信号シーケンス及び各々のK個の仮想アンテナベクトルに基づいて各々のK個の参照信号シーケンスベクトルを生成し(K<N)、前記各々のK個の参照信号シーケンスベクトルを前記N個のアンテナを介して送信するように形成されるプロセッサを含む。これにより、全体システム性能が向上されることができる。
【選択図】図13
Description
LTE端末に4アンテナ送信が適用される場合、基地局は、8個の仮想アンテナを構成し、4個の仮想アンテナを選択し、参照信号を送信することができる。この場合、次のような仮想アンテナ行列を構成することができる。
LTE端末に2アンテナ送信が適用される場合、基地局は、8個の仮想アンテナを構成し、2個の仮想アンテナを選択し、参照信号を送信することができる。この場合、次のような仮想アンテナ行列を構成することができる。
仮想アンテナの構成は仮想アンテナベクトル#i(vi)によりチャネル特性が決定される。従って、仮想アンテナベクトル#i(vi)を異に構成すると、異なる仮想アンテナを介して参照信号が送信される効果を得ることができる。
Nt個の仮想アンテナは、K個の仮想アンテナを含む第1の仮想アンテナグループとNt−K個の仮想アンテナを含む第2の仮想アンテナグループのように二つの仮想アンテナグループに定めることができる。例えば、Ntは8であり、Kは4である。第1の仮想アンテナグループ(G1)と第2の仮想アンテナグループ(G2)が第1の区間(t1)と第2の区間(t2)で互いに仮想アンテナベクトルが交換されるようにすることができる。この場合、全ての仮想アンテナベクトルにより生成されるNt個の仮想アンテナチャネルが固定された参照信号シーケンス位置で得ることができるように構成されることができる。
基地局は、Nt個の仮想アンテナのうちK個の仮想アンテナを任意に選択してK個の仮想アンテナに対する情報である仮想アンテナ情報をLTE−A端末に知らせることができる。この時、K個の仮想アンテナは時間によって変わることができる。選択されたK個の仮想アンテナに対する仮想アンテナ情報は一定周期毎に送信されることができる。または、Nt個の仮想アンテナのうちK個の仮想アンテナが選択されるパターンを予め定めることもできる。
前述の仮想アンテナ再設定、仮想アンテナ交換、仮想アンテナ選択などの方法を用いてNt個の送信アンテナMIMO技法のための測定用参照信号が送信されることができる。
Nt個の仮想アンテナを使用するLTE−A端末は、参照信号を用いてチャネルを推定する場合、仮想アンテナチャネル情報を得るようになる。
Claims (10)
- N個のアンテナ;及び、
前記N個のアンテナと連結され、
各々のK個の参照信号シーケンス及び各々のK個の仮想アンテナベクトルに基づいて各々のK個の参照信号シーケンスベクトルを生成し(K<N)、
前記各々のK個の参照信号シーケンスベクトルを前記N個のアンテナを介して送信するように形成されるプロセッサ;
を含むことを特徴とする参照信号送信装置。 - 前記プロセッサは、
前記各々のK個の参照信号シーケンスベクトルを第1の区間中に送信し、
各々のN−K個の参照信号シーケンス及び各々のN−K個の仮想アンテナベクトルに基づいて各々のN−K個の参照信号シーケンスベクトルを生成し、
前記各々のN−K個の参照信号シーケンスベクトルを第2の区間中に前記N個のアンテナを介して送信するように形成されることを特徴とする請求項1に記載の参照信号送信装置。 - 前記各々のK個の仮想アンテナベクトル及び前記各々のN−K個の仮想アンテナベクトルは、N×Nの大きさの仮想アンテナ行列から選択される互いに異なる列ベクトル(column vector)であることを特徴とする請求項2に記載の参照信号送信装置。
- 前記各々のK個の参照信号シーケンスのうち少なくとも一つ以上の参照信号シーケンスの参照信号パターンは、前記各々のN−K個の参照信号シーケンスのうち少なくとも一つ以上の参照信号シーケンスの参照信号パターンと同一であり、
参照信号パターンは、参照信号シーケンス送信に使われる時間−周波数リソースパターンであることを特徴とする請求項3に記載の参照信号送信装置。 - 前記仮想アンテナ行列は、ユニタリ行列であることを特徴とする請求項3に記載の参照信号送信装置。
- 前記プロセッサは、端末から仮想アンテナチャネル情報のフィードバックを受けることを特徴とする請求項1に記載の参照信号送信装置。
- 前記プロセッサは、端末から前記物理的アンテナチャネル情報のフィードバックを受け、
前記物理的アンテナチャネル情報は、仮想アンテナチャネル及び前記仮想アンテナチャネル行列に基づいて推定されることを特徴とする請求項3に記載の参照信号送信装置。 - 前記プロセッサは、
前記各々のK個の参照信号シーケンスベクトルを第1の周波数領域を介して送信し、
各々のN−K個の参照信号シーケンス及び各々のN−K個の仮想アンテナベクトルに基づいて各々のN−K個の参照信号シーケンスベクトルを生成し、
前記各々のN−K個の参照信号シーケンスベクトルを第2の周波数領域を介して前記N個のアンテナを介して送信するように形成されることを特徴とする請求項1に記載の参照信号送信装置。 - 無線通信システムにおける参照信号送信方法において、
各々のK個の参照信号シーケンス及び各々のK個の仮想アンテナベクトルに基づいて各々のK個の参照信号シーケンスベクトルを生成する段階(K<N);及び、
前記各々のK個の参照信号シーケンスベクトルをN個のアンテナを介して送信する段階;
を含むことを特徴とする方法。 - 前記各々のK個の参照信号シーケンスベクトルは第1の区間中に送信され、
各々のN−K個の参照信号シーケンス及び各々のN−K個の仮想アンテナベクトルに基づいて各々のN−K個の参照信号シーケンスベクトルを生成する段階;及び、
前記各々のN−K個の参照信号シーケンスベクトルを第2の区間中に前記N個のアンテナを介して送信する段階;
をさらに含むことを特徴とする請求項9に記載の方法。
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US14839909P | 2009-01-30 | 2009-01-30 | |
US61/148,399 | 2009-01-30 | ||
US16303309P | 2009-03-24 | 2009-03-24 | |
US61/163,033 | 2009-03-24 | ||
US16971209P | 2009-04-15 | 2009-04-15 | |
US61/169,712 | 2009-04-15 | ||
KR1020100008124A KR101755038B1 (ko) | 2009-01-30 | 2010-01-28 | 무선 통신 시스템에서 참조신호 전송 장치 및 방법 |
KR10-2010-0008124 | 2010-01-28 | ||
PCT/KR2010/000549 WO2010087644A2 (ko) | 2009-01-30 | 2010-01-29 | 무선 통신 시스템에서 참조신호 전송 장치 및 방법 |
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EP (1) | EP2385635B1 (ja) |
JP (1) | JP5438130B2 (ja) |
KR (1) | KR101755038B1 (ja) |
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CN102334300A (zh) | 2012-01-25 |
JP5438130B2 (ja) | 2014-03-12 |
US20110281536A1 (en) | 2011-11-17 |
KR101755038B1 (ko) | 2017-07-06 |
KR20100088555A (ko) | 2010-08-09 |
WO2010087644A3 (ko) | 2010-10-28 |
EP2385635A4 (en) | 2014-12-03 |
EP2385635B1 (en) | 2018-11-14 |
EP2385635A2 (en) | 2011-11-09 |
CN102334300B (zh) | 2014-02-12 |
WO2010087644A2 (ko) | 2010-08-05 |
US8463210B2 (en) | 2013-06-11 |
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