JP5204152B2 - Mimo通信システムにおけるインクリメンタル冗長度送信 - Google Patents
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Description
本出願は、参照することによりその全体が組み込まれる、2003年9月9日に出願された米国仮出願シリアル番号第60/501,777および2003年12月19日に出願された米国仮出願シリアル番号第60/531,391の優先権を主張する。
図4Aは、送信器110内のTXデータプロセッサー120の一実施形態のブロック図を示す。TXデータプロセッサー120は、データパケットを受信し、選択されたレートに基づいて各パケットを処理し、パケットのためのNBのデータシンボルブロックを供給する。図5は、TXデータプロセッサー120によって1つのデータパケットの処理を図解する。
図8Aは、図1の受信機の一実施形態である受信機150aのブロック図を示す。受信機150aにおいて、NRの受信アンテナ810a乃至810rは、送信機110により送信されたNTの変調された信号を受信し、受信機ユニット154内のそれぞれNRのRX RFユニット812a乃至812rにNRの受信された信号を供給する。各RX RFユニット812はその受信される信号に条件付けてディジタル化し、シンボル/チップのストリームを提供する。単一キャリアのMIMOシステムの場合、OFDM復調器814a乃至814rは必要なく、各RX RFユニット812は、それぞれのデマルチプレクサー816に直接シンボルのストリームを供給する。MIMO−OFDMシステムの場合、各RX RFユニット812は、それぞれのOFDM復調器814にチップのストリームを供給する。各OFDM復調器814は、(1)各受信されたOFDMシンボル内の循環プリフィックスを除去し、受信された変換されたシンボルを得る、および(2)各受信された変換されたシンボルを高速フーリエ変換(FFT)を用いて周波数ドメインに変換し、NFのサブバンドのためのNFの受信されたシンボルを得ることにより、チップのストリーム上でOFDM復調を実行する。両方のシステムの場合、デマルチプレクサー816a乃至816rは、RX RFユニット812またはOFDM復調器814からNRのシンボルストリームを受信し、各スロットのための(データのための)受信されたシンボルのNRのシーケンスをRX空間プロセッサー160aに供給し、受信されたパイロットシンボルをチャネル推定器172に供給する。
単一キャリアMIMOシステムおよびMIMO−OFDMシステムの両方の場合、受信機および/または送信機は、MIMOチャネルを推定することができ、MIMOチャネル上のデータ送信のための適切なレートを選択することができる。レート選択は種々の方法で実施してもよい。いくつかの例示レート選択スキームは、以下に記載される。
Claims (21)
- 無線多入力多出力(MIMO)通信システムにおいて、インクリメンタル冗長度(IR)送信を送信する方法において、
データパケットを符号化して符号化された情報を含む符号化されたパケットを取得することと、
前記符号化されたパケットを複数の符号化されたサブパケットに分割することと、
前記複数の符号化されたサブパケットに基づいて複数のシンボルブロックを生成することと、ここにおいて、各シンボルブロックは、前記データパケットに関する異なる符号化された情報を含む、
送信機における複数の送信アンテナから受信機における複数の受信アンテナへ、前記複数のシンボルブロック内の第1のシンボルブロックを送信することと、
前記第1のシンボルブロックに基づいて前記受信機により前記データパケットが正しく復号されるなら前記データパケットの送信を終了することと、
前記第1のシンボルブロックに基づいて前記データパケットが前記受信機により正しくデコードされないなら、前記複数のシンボルブロック内の第2のシンボルブロックを、前記送信機から前記受信機へ送信することと、ここにおいて、前記複数のシンボルブロックの1つが前記データパケットに関して一度に送信される、
を備えた、方法。 - 前記データパケットに関してネガティブアクノレジメント(NAK)を前記受信機から受信することとをさらに備えた、請求項1の方法。
- 前記データパケットが正しくデコードされるまで、または、前記複数のシンボルブロックのすべてが送信されるまで、一度に1つのシンボルブロックの割合で、前記複数のシンボルブロックの残りのシンボルブロックを送信することとをさらに備えた、請求項1の方法。
- 前記複数の送信アンテナと前記複数の受信アンテナとの間のMIMOチャネル上のデータ送信に関して選択されたレートを取得することをさらに備え、前記データパケットは、前記選択されたレートに従って処理される、請求項1の方法。
- 前記データパケットを符号化することは、
前記選択されたレートにより示されるコーディングスキームに従って前記データパケットを符号化し、前記符号化されたパケットを取得することと、
前記複数のシンボルブロックを生成することは、前記選択されたレートにより示される変調スキームに従って前記複数の符号化されたサブパケットを変調することを含む、請求項4の方法。 - 前記第1のシンボルブロックを送信することは、
前記第1のシンボルブロック内の各シンボルを前記複数の送信アンテナの1つに多重化することを備える、請求項1の方法。 - 前記第1のシンボルブロックを送信することは、
前記第1のシンボルブロック内のシンボルをプリコーディングマトリクス(precoding matrix)でプリコード(precode)し、各シンボルを前記複数の送信アンテナのすべてから送信することを備えた、請求項1の方法。 - 前記プリコーディングマトリクスは、ディスクリートフーリエ変換(DFT)マトリクスを備えた、請求項7の方法。
- 第2のデータパケットを処理し、第2の複数のシンボルブロックを取得することと、ここにおいて、前記第2の複数のシンボルブロック内の各シンボルブロックは、前記第2のデータパケットに関する異なる符号化された情報を含む、
前記第2の複数のシンボルブロック内の第1のシンボルブロックを、前記複数のシンボルブロック内の前記第1のシンボルブロックと同時に、前記送信機から前記受信機へ送信することと、
をさらに備えた、請求項1の方法。 - 各データパケットに関して1つの複数のシンボルブロックの割合で、Npのデータパケットが処理され、Npの複数のシンボルブロックを処理する、ここにおいて、Npは1以上であり、前記Npのデータパケットに関するNpのシンボルブロックは前記複数の送信アンテナから複数のサブキャリア上に同時に送信される、請求項1の方法。
- 無線多入力多出力(MIMO)通信システムにおいてインクリメンタル冗長度(IR)送信を送信する装置において、
データパケットを符号化して符号化された情報を含む符号化されたパケットを取得する手段と、
前記符号化されたパケットを複数の符号化されたサブパケットに分割する手段と、
各符号化されたサブパケットに関して1つのシンボルブロックの割合で、前記複数の符号化されたサブパケットに基づいて複数のシンボルブロックを生成する手段と、ここにおいて、各シンボルブロックは、前記データパケットに関する異なる符号化された情報を含む、
送信機における複数の送信アンテナから受信機における複数の受信アンテナへ、前記複数のシンボルブロック内の第1のシンボルブロックを送信する手段と、
前記第1のシンボルブロックに基づいて前記受信機により前記データパケットが正しくデコードされたなら前記データパケットの送信を終了する手段と、
前記第1のシンボルブロックに基づいて前記データパケットが前記受信機により正しくデコードされないなら、前記送信機から前記受信機へ、前記複数のシンボルブロック内の第2のシンボルブロックを送信する手段と、ここにおいて、前記複数のシンボルブロックの1つが前記データパケットに関して一度に送信される、
を備えた装置。 - 前記受信機から前記データパケットに関するネガティブアクノレジメント(NAK)を受信する手段をさらに備え、前記第2のシンボルブロックは、前記NAKを受信することに応答して送信される、請求項11の装置。
- 前記データパケットが前記受信機により正しくデコードされるまで、または、前記複数のシンボルブロックのすべてが送信されるまで、一度に1つのシンボルブロックの割合で、前記複数のシンボルブロックの残りのシンボルブロックを送信する手段をさらに備えた、請求項11の装置。
- 前記複数の送信アンテナと前記複数の受信アンテナとの間のMIMOチャネル上のデータ送信に関して選択されたレートを取得する手段をさらに備え、前記データパケットは、前記選択されたレートに従って処理される、請求項11の装置。
- 前記データパケットを符号化する手段は、
前記選択されたレートにより示されるコーディングスキームに従って前記データパケットを符号化し、前記符号化されたパケットを取得する手段と、
を備え、
前記複数のシンボルブロックを生成する手段は、前記選択されたレートにより示される変調スキームに従って前記複数の符号化されたサブパケットを変調し、前記複数のシンボルブロックを取得する手段を具備する、請求項14の装置。 - 前記第1のシンボルブロックを送信する手段は、
前記第1のシンボルブロック内の各シンボルを前記複数の送信アンテナの1つに多重化する手段を備えた、請求項11の装置。 - 前記第1のシンボルブロックを送信する手段は、
前記第1のシンボルブロック内のシンボルをプリコーディグマトリクスでプリコードし、前記複数の送信アンテナのすべてから各シンボルを送信する手段を備えた、請求項11の装置。 - 第2のデータパケットを処理し、第2の複数のシンボルブロックを取得する手段と、ここにおいて、前記第2の複数のシンボルブロック内の各シンボルブロックは、前記第2のデータパケットに関して異なる符号化された情報を含む、
前記第2の複数のシンボルブロック内の第1のシンボルブロックを前記複数のシンボルブロック内の前記第1のシンボルブロックと同時に、前記送信機から前記受信機へ送信する手段と、
をさらに備えた、請求項11の装置。 - 各データパケットに関して1つの複数のシンボルブロックの割合で、Npのデータパケットが処理され、Npの複数のシンボルブロックが取得される、ここにおいて、Npは1以上であり、前記Npのデータパケットに関するNpのシンボルブロックは、前記複数の送信アンテナから複数のサブキャリア上に同時に送信される、請求項11の装置。
- コンピュータに、請求項1乃至10の1つに従う方法を実行させるプログラム。
- コンピュータに、請求項1乃至10の1つに従う方法を実行させるプログラムが記録されたコンピュータ読取可能記録媒体。
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