JP2012085362A - チャネル品質インジケータビットおよびプリコーディング制御情報ビットを符号化するための方法および装置 - Google Patents
チャネル品質インジケータビットおよびプリコーディング制御情報ビットを符号化するための方法および装置 Download PDFInfo
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Abstract
【解決手段】CQIビットおよび/またはPCIビットなどの入力ビットの各々は、特定の重要性を有する。入力ビットは、線形ブロック符号化で符号化される。入力ビットは、各入力ビットの重要性に基づく不均一誤り保護が提供される。入力ビットは、各入力ビットの重要性に基づいて複製することができ、均一保護符号化を行うことができる。符号化のための生成行列は、従来の基底シーケンスの基本オペレーションによって生成されて、より多くの保護を最上位ビット(MSB)に提供することができる。
【選択図】図1
Description
c=mG 式(1)
式中、cは出力符号語、mは入力ベクトル、Gは生成行列である。
n≧m0≧・・・≧mk-1≧1 式(2)
次いで、生成行列Gは、次のように生成される。biに対応するGの行(すなわち行i+1)は、mi1で充当され、エントリの残りは、0である。したがって、入力ビットは、次第に少なくなるパリティ検査に関与し、それゆえ、次第に少なくなる誤り保護を受ける。
c=mG=[mCQI mAck]G 式(3)
式中、mCQIはCQIビット、mAckは家訓応答情報、Gは生成行列である。例えば、mCQIは1×5行ベクトル、mAckは単一ストリームについて1ビット(一般に、m個のストリームでは1×m行ベクトル)、Gは、6×30行列であり、最後の行における最初の20個の要素が0である。
s(G)i=min{wt(mG)|m∈GF(2)k,mi≠0},i=1,...,k 式(5)
1)5列目の基底シーケンスは、列5および列8のXORオペレーションによって置き換えられる。
2)6列目の基底シーケンスは、列6および列9のXORオペレーションによって置き換えられる。
3)7列目の基底シーケンスは、列7および列10のXORオペレーションによって置き換えられる。
Claims (10)
- 無線送受信ユニット(WTRU)においてチャネル品質インジケータ(CQI)ビットを符号化するための方法であって、
CQIビットを生成することと、
前記CQIビットを符号化することと、
利得ファクターβhsを前記CQIビットに適用することと、
前記符号化されたCQIビットを送ることであって、前記CQIビットの前記利得ファクターβhsは、量子化振幅比(Ahs=βhs/βc)から導出され、βcは専用物理制御チャネル(DPCCH)の利得ファクターであり、前記WTRUがMIMOモードで構成されている場合、Ahsは、タイプAのCQIが送信されるとき、前記信号で送られた値ΔCQI+1から変換された前記量子化振幅比に等しいことを特徴とする方法。 - 前記CQIビットを運ぶタイムスロットについて、前記WTRUがMIMOモードで構成されていない場合、Ahsは、前記信号で送られた値ΔCQIから変換された前記量子化振幅比に等しいことを特徴とする請求項1に記載の方法。
- 前記CQIビットを運ぶタイムスロットについて、前記WTRUがMIMOモードで構成されている場合、Ahsは、タイプBのCQIが送信されるとき、前記信号で送られた値ΔCQIから変換された前記量子化振幅比に等しいことを特徴とする請求項1に記載の方法。
- Ahsは、前記信号で送られた値ΔCQI+1が9と等しいとき、38/15に変換されることを特徴とする請求項1に記載の方法。
- βhsは、高速アップリンク制御チャネル(HS−DPCCH)の利得ファクターであることを特徴とする請求項1に記載の方法。
- チャネル品質インジケータ(CQI)ビットを符号化するための無線送受信ユニット(WTRU)であって、
CQIビットを生成するためのCQI生成器と、
前記CQIビットを符号化するためのエンコーダと、
利得ファクターβhsを前記CQIビットに適用し、前記符号化されたCQIビットを送るための送信機であって、前記CQIビットの前記利得ファクターβhsは、量子化振幅比(Ahs=βhs/βc)から導出され、βcは専用物理制御チャネル(DPCCH)の利得ファクターであり、Ahsは、タイプAのCQIが送信されるとき、前記信号で送られた値ΔCQI+1から変換された前記量子化振幅比に等しいことを特徴とするWTRU。 - 前記CQIビットを運ぶタイムスロットについて、前記WTRUがMIMOモードで構成されていない場合、Ahsは、前記信号で送られた値ΔCQIから変換された前記量子化振幅比に等しいことを特徴とする請求項6に記載のWTRU。
- 前記CQIビットを運ぶタイムスロットについて、前記WTRUがMIMOモードで構成されている場合、Ahsは、タイプBのCQIが送信されるとき、前記信号で送られた値ΔCQIから変換された前記量子化振幅比に等しいことを特徴とする請求項6に記載のWTRU。
- Ahsは、前記信号で送られた値ΔCQI+1が9と等しいとき、38/15に変換されることを特徴とする請求項9に記載のWTRU。
- βhsは、高速アップリンク制御チャネル(HS−DPCCH)の利得ファクターであることを特徴とする請求項6に記載のWTRU。
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