JP2005142715A - 無線通信システム、並びに無線通信装置及び無線通信方法、並びにコンピュータ・プログラム - Google Patents
無線通信システム、並びに無線通信装置及び無線通信方法、並びにコンピュータ・プログラム Download PDFInfo
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Abstract
【解決手段】 送信機側では、受信機から送られるリファレンス信号に基づいて送信機においてチャネル情報を測定し、チャネル情報に基づいて送信アンテナの重み係数行列を決定する。そして、多重化する信号毎の重みを算出し、該多重化する信号毎に重みを与えたトレーニング信号を受信機へ送信する。一方、受信機側では、受信したトレーニング信号に基づいて、受信アンテナ重み係数行列を決定する。
【選択図】 図1
Description
受信機から送信機へ送られる受信機の受信アンテナ本数分のリファレンス信号に基づいて送信機においてチャネル情報を測定し、
該取得したチャネル情報に基づいて送信アンテナの重み係数行列を決定し、
送信機において多重化する信号毎の重みを算出し、該多重化する信号毎に重みを与えたトレーニング信号を送信機から受信機へ送信し、
受信機側では、受信したトレーニング信号に基づいて、受信アンテナ重み係数行列を決定する、
ことを特徴とする無線通信システムである。
受信先までのチャネル情報を取得するチャネル情報取得ステップと、
該取得したチャネル情報に基づいて送信アンテナの重み係数行列を決定する送信アンテナ重み係数行列決定ステップと、
多重化する信号毎の重みを算出する重み算出ステップと、
該多重化する信号毎に重みを与えたトレーニング信号を受信先へ送信するトレーニング信号送信ステップと、
を具備することを特徴とするコンピュータ・プログラムである。
以上、特定の実施形態を参照しながら、本発明について詳解してきた。しかしながら、本発明の要旨を逸脱しない範囲で当業者が該実施形態の修正や代用を成し得ることは自明である。すなわち、例示という形態で本発明を開示してきたのであり、本明細書の記載内容を限定的に解釈するべきではない。本発明の要旨を判断するためには、冒頭に記載した特許請求の範囲の欄を参酌すべきである。
11…チャネル推定部
12…送受信校正部
13…送信アンテナ重み係数行列算出部
15…特異値分解部
20…受信機
21…チャネル推定部
22…第1の受信アンテナ重み係数行列算出部
23…復号部
24…符号化部
25…第2の受信アンテナ重み係数行列算出部
Claims (15)
- 複数のアンテナを持つ送信機と複数のアンテナを持つ受信機が対となって信号を多重化して通信する無線通信システムであって、
送信機と受信機間のチャネル情報を取得するチャネル情報取得手段と、
該取得したチャネル情報に基づいて送信アンテナの重み係数行列を決定する送信アンテナ重み係数行列決定手段と、
送信機において多重化する信号毎の重みを算出する重み算出手段と、
該多重化する信号毎に重みを与えたトレーニング信号を送信機から受信機へ送信する手段と、
受信機側において、受信したトレーニング信号に基づいて、受信アンテナ重み係数行列を決定する受信アンテナ重み係数行列決定手段と、
を具備することを特徴とする無線通信システム。 - 前記チャネル情報取得手段は、受信機から送信機へ送られる受信機のアンテナ本数分のリファレンス信号に基づいて送信機においてチャネル情報を測定する、
ことを特徴とする請求項1に記載の無線通信システム。 - 前記チャネル情報取得手段は、受信機から送信機へ送られるリファレンス信号に基づいて得られたチャネル情報にキャリブレーションを施して、送信機から受信機の方向におけるチャネル情報を得る、
ことを特徴とする請求項2に記載の無線通信システム。 - 前記送信アンテナ重み係数行列決定手段は、受信機側のアンテナ毎に最大比合成規範、不要信号をすべてキャンセルするゼロ化規範、最大比合成規範とゼロ化の組み合わせ、又は特異値分解により送信アンテナ重み係数行列を決定する、
ことを特徴とする請求項1に記載の無線通信システム。 - 前記受信アンテナ重み係数行列決定手段は、不要信号をすべてキャンセルするゼロ化規範を適用して受信アンテナ重み係数行列を決定する、
ことを特徴とする請求項1に記載の無線通信システム。 - 送信機が送信要求パケットRTS(Request To Send)を送信し、受信機から確認通知パケットCTS(Clear To Send)を受信したことに応答してデータ伝送を開始するRTS/CTS方式を採用し、
受信機はCTSパケットにリファレンス信号を含ませて送信し、
送信機は、CTSパケットに含まれるリファレンス信号に基づいて得られたチャネル情報から多重化する信号毎の重みを算出し、該多重化する信号毎に重みを与えたトレーニング信号を含んだデータ・パケットを送信する、
ことを特徴とする請求項2に記載の無線通信システム。 - 複数のアンテナを用いて信号を多重化して送信する無線通信装置であって、
受信先までのチャネル情報を取得するチャネル情報取得手段と、
該取得したチャネル情報に基づいて送信アンテナの重み係数行列を決定する送信アンテナ重み係数行列決定手段と、
多重化する信号毎の重みを算出する重み算出手段と、
該多重化する信号毎に重みを与えたトレーニング信号を受信先へ送信するトレーニング信号送信手段と、
を具備することを特徴とする無線通信装置。 - 前記チャネル情報取得手段は、受信機から送られる受信機のアンテナ本数分のリファレンス信号に基づいてチャネル情報を測定する、
ことを特徴とする請求項7に記載の無線通信装置。 - 前記チャネル情報取得手段は、受信機から送られるリファレンス信号に基づいて得られたチャネル情報にキャリブレーションを施して、受信機方向におけるチャネル情報を得る、
ことを特徴とする請求項8に記載の無線通信装置。 - 前記送信アンテナ重み係数行列決定手段は、受信機側のアンテナ毎に最大比合成規範、不要信号をすべてキャンセルするゼロ化規範、最大比合成規範とゼロ化の組み合わせ、又は特異値分解により送信アンテナ重み係数行列を決定する、
ことを特徴とする請求項7に記載の無線通信装置。 - 送信機が送信要求パケットRTS(Request To Send)を送信し、受信機から確認通知パケットCTS(Clear To Send)を受信したことに応答してデータ伝送を開始するRTS/CTS方式を採用し、
リファレンス信号を含んだCTSパケットを受信し、
前記チャネル情報取得手段は、CTSパケットに含まれるリファレンス信号に基づいてチャネル情報を得て、多重化する信号毎の重みを算出し、
前記トレーニング信号送信手段は、多重化する信号毎に重みを与えたトレーニング信号を含んだデータ・パケットを送信する、
ことを特徴とする請求項8に記載の無線通信装置。 - 多重化された信号を複数のアンテナを用いて受信する無線通信装置であって、
受信アンテナ本数分のリファレンス信号を前記多重化された信号の送信元に送信する手段を備える、
ことを特徴とする無線通信装置。 - 多重化する信号毎に重みが与えられたトレーニング信号を受信する手段と、
該トレーニング信号に基づいて、受信アンテナ重み係数行列を決定する手段と、
ゼロ化及びキャンセリングを繰り返し起動して多重化された各信号を取り出す手段と、
をさらに備えることを特徴とする請求項12に記載の無線通信装置。 - 複数のアンテナを用いて信号を多重化して送信する無線通信方法であって、
受信先までのチャネル情報を取得するチャネル情報取得ステップと、
該取得したチャネル情報に基づいて送信アンテナの重み係数行列を決定する送信アンテナ重み係数行列決定ステップと、
多重化する信号毎の重みを算出する重み算出ステップと、
該多重化する信号毎に重みを与えたトレーニング信号を受信先へ送信するトレーニング信号送信ステップと、
を具備することを特徴とする無線通信方法。 - 複数のアンテナを用いて信号を多重化して送信するための処理をコンピュータ・システム上で実行するようにコンピュータ可読形式で記述されたコンピュータ・プログラムであって、
受信先までのチャネル情報を取得するチャネル情報取得ステップと、
該取得したチャネル情報に基づいて送信アンテナの重み係数行列を決定する送信アンテナ重み係数行列決定ステップと、
多重化する信号毎の重みを算出する重み算出ステップと、
該多重化する信号毎に重みを与えたトレーニング信号を受信先へ送信するトレーニング信号送信ステップと、
を具備することを特徴とするコンピュータ・プログラム。
Priority Applications (12)
Application Number | Priority Date | Filing Date | Title |
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JP2003375503A JP4337507B2 (ja) | 2003-11-05 | 2003-11-05 | 無線通信システム、並びに無線通信装置及び無線通信方法、並びにコンピュータ・プログラム |
US10/922,911 US7474641B2 (en) | 2003-11-05 | 2004-08-23 | Wireless communications system, wireless communications apparatus, wireless communications method and computer program for wireless communication |
CN2008100822744A CN101267282B (zh) | 2003-11-05 | 2004-10-14 | 无线通信系统、设备和方法 |
CNB2004100881918A CN100384101C (zh) | 2003-11-05 | 2004-10-14 | 无线通信系统、无线通信设备、无线通信方法和无线通信的计算机程序 |
US12/261,708 US8249002B2 (en) | 2003-11-05 | 2008-10-30 | Wireless communications system, wireless communications apparatus, wireless communications method and computer program for wireless communication |
US13/548,476 US8559386B2 (en) | 2003-11-05 | 2012-07-13 | Wireless communications system, wireless communications apparatus, wireless communications method and computer program for wireless communication |
US13/959,151 US8718009B2 (en) | 2003-11-05 | 2013-08-05 | Wireless communications system, wireless communications apparatus, wireless communications method and computer program for wireless communication |
US13/959,131 US8711800B2 (en) | 2003-11-05 | 2013-08-05 | Wireless communications system, wireless communications apparatus, wireless communications method and computer program for wireless communication |
US14/200,803 US9025557B2 (en) | 2003-11-05 | 2014-03-07 | Wireless communications system, wireless communications apparatus, wireless communications method and computer program for wireless communication |
US14/692,211 US10361888B2 (en) | 2003-11-05 | 2015-04-21 | Wireless communications system, wireless communications apparatus, wireless communications method and computer program for wireless communication |
US15/385,969 US9819517B2 (en) | 2003-11-05 | 2016-12-21 | Wireless communications system, wireless communications apparatus, wireless communications method and computer program for wireless communication |
US16/449,454 US10673655B2 (en) | 2003-11-05 | 2019-06-24 | Wireless communications system, wireless communications apparatus, wireless communications method and computer program for wireless communication |
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CN100384101C (zh) | 2008-04-23 |
US9025557B2 (en) | 2015-05-05 |
CN101267282A (zh) | 2008-09-17 |
US20170104612A1 (en) | 2017-04-13 |
US20090059880A1 (en) | 2009-03-05 |
US20130322380A1 (en) | 2013-12-05 |
US8559386B2 (en) | 2013-10-15 |
US9819517B2 (en) | 2017-11-14 |
US8249002B2 (en) | 2012-08-21 |
CN1614905A (zh) | 2005-05-11 |
US10361888B2 (en) | 2019-07-23 |
US20190312754A1 (en) | 2019-10-10 |
US20050094741A1 (en) | 2005-05-05 |
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