JP2016007013A - アップリンクのマルチアンテナ送信のための方法および装置 - Google Patents
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Abstract
【解決手段】マルチアンテナを使用したアップリンク送信のための方法および装置が開示される。無線送受信ユニットは、時空間送信ダイバーシチ(STTD)用に構成された物理チャネルの入力ストリームに対してSTTD符号化を実行する。各物理チャネルは、同相(I)ブランチまたは直交位相(Q)ブランチにマッピングすることができる。WTRUは、バイナリ領域または複素領域でSTTD符号化を実行することができる。さらに、WTRUは、E−DPDCHを含めた少なくとも1つの物理チャネルに対するプリコーディング重みによるプリコーディングと、プリコーディングされた出力ストリームの、複数のアンテナを介した送信とを実行することができる。
【選択図】図2
Description
x(n)=x1(n)+jx2(n)+x3(n)+jx4(n) 式(2)
s0={x(0),x(l),x(2),x(3)} 式(3)
また、第2のSTTDシンボル(奇数シンボル)は次の4つのチップを含む。
s1={x(4),x(5),x(6),x(7)} 式(4)
SF_CH=CH*CCH*βCH*iqCH, 式(5)
式中、CHは拡散され重み付けされるべき物理チャネルの実数値のビットである。CCHは規格で定められているかまたはネットワークによって構成されたOVSFチャネライゼーションコードであり、βCHは信号で送られうるか、または信号で送られたパラメータと、トランスポートブロックのサイズかまたは情報ビット数とに基づいて計算されうるゲイン係数であり、iqCHはIまたはQブランチマッピングのための複素数値である(iqCH=1またはiqCH=j)。
PV(n)=f(PV(n−1)、トリガ(n−期間+1:n)) 式(11)
式中、nは、プリコーディングベクトルの更新率に応じたTTIまたはスロットの時係数であり、トリガ(n−期間+l:n)は、WTRUが期間中に受信し、WTRUがプリコーディングベクトルPV(n)を選択するきっかけとなるトリガを示す。パラメータ「期間」は、既定であっても、ネットワークにより構成されたものであってもよい。
P=WH(α(H1 HH1)+(l−α)(H2 HH2+…))W 式(12)
式中、Hkはセルkでの推定されたチャネル行列であり、セル#1はE−DCHサービングセルであり、係数αは1以下の既定のパラメータである。例えば、サービングセルのパフォーマンスを強調するためにはα=0.7である。UPCIは、プリコーディング重みを選択するための、WTRUへのフィードバックである。
Claims (10)
- 無線送受信ユニット(WTRU)において実施される、マルチアンテナを使用したアップリンク送信の方法において、
少なくとも1つの拡張専用チャネル(E−DCH)専用物理データチャネル(E−DPDCH)、第1の専用物理制御チャネル(DPCCH)および第2のDPCCHを処理して、第1のデータストリームおよび第2のデータストリームを生成するステップと、
前記生成された第1のデータストリームおよび前記第2のデータストリームに、プリコーディング重み付けを適用するステップと、
複数のアンテナを経由して、前記第1のデータストリームおよび前記第2のデータストリームを送信するステップと
を備えることを特徴とする方法。 - 前記第1のデータストリームおよび前記第2のデータストリームは、同一のパイロットシーケンスを運ぶことを特徴とする請求項1に記載の方法。
- 前記第1のデータストリームおよび前記第2のデータストリームは、異なるチャネライゼーションコードを使用して送信されることを特徴とする請求項1に記載の方法。
- 前記第1のデータストリームは、E−DCH専用物理制御チャネル(E−DPCCH)、高速専用物理制御チャネル(HS−DPCCH)、または、専用物理データチャネル(DPDCH)の少なくとも1つを含むことを特徴とする請求項1に記載の方法。
- 前記プリコーディング重み付けのプリコーディング重み付け行列は、対角であることを特徴とする請求項1に記載の方法。
- マルチアンテナを使用したアップリンク送信のための無線送受信ユニット(WTRU)において、
少なくとも1つの拡張専用チャネル(E−DCH)専用物理データチャネル(E−DPDCH)、第1の専用物理制御チャネル(DPCCH)および第2のDPCCHを処理して、第1のデータストリームおよび第2のデータストリームを生成するよう構成された物理レイヤ処理ブロックと、
前記生成された第1のデータストリームおよび前記第2のデータストリームに、プリコーディング重み付けを適用するよう構成されたプリコーディングブロックと、
前記第1のデータストリームおよび前記第2のデータストリームを送信する複数のアンテナと
を備えたことを特徴とするWTRU。 - 前記第1のデータストリームおよび前記第2のデータストリームは、同一のパイロットシーケンスを運ぶことを特徴とする請求項6に記載のWTRU。
- 前記第1のデータストリームおよび前記第2のデータストリームは、異なるチャネライゼーションコードを使用して送信されることを特徴とする請求項6に記載のWTRU。
- 前記第1のデータストリームは、E−DCH専用物理制御チャネル(E−DPCCH)、高速専用物理制御チャネル(HS−DPCCH)、または、専用物理データチャネル(DPDCH)の少なくとも1つを含むことを特徴とする請求項6に記載のWTRU。
- 前記プリコーディング重み付けのプリコーディング重み付け行列は、対角であることを特徴とする請求項6に記載のWTRU。
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US20140153668A1 (en) | 2014-06-05 |
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WO2011041492A3 (en) | 2014-12-31 |
CN102714579A (zh) | 2012-10-03 |
US20110080972A1 (en) | 2011-04-07 |
WO2011041492A2 (en) | 2011-04-07 |
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