JP5230779B2 - 無線通信装置及び無線通信方法 - Google Patents
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また、本発明の無線通信装置は、マルチキャリア伝送された信号を受信するアレーアンテナと、前記マルチキャリア伝送に用いる通信帯域を分割した分割帯域毎に、前記分割帯域に属するサブキャリア信号群に含まれる複数のサブキャリア信号を用いて、複数の受信指向性ビームを形成するための受信アレー重みを生成する受信重み生成部と、前記分割帯域毎に生成された前記受信アレー重みを、前記受信された信号のうち、前記分割帯域に属するサブキャリア信号に乗算することで、複数の重みづけがなされたサブキャリア信号を生成するサブキャリア受信指向性形成部と、前記複数の重みづけがなされたサブキャリア信号を復号する復号部とを具備することを特徴とする。
本発明の無線通信方法は、マルチキャリア伝送された信号を受信し、前記マルチキャリア伝送に用いる通信帯域を分割した分割帯域毎に、前記分割帯域に属するサブキャリア信号群に含まれる複数のサブキャリア信号を用いて、受信指向性ビームを形成するための1つの受信アレー重みを生成し、前記分割帯域毎に生成された前記受信アレー重みを、前記受信された信号のうち、前記分割帯域に属するサブキャリア信号に乗算することで、重みづけがなされたサブキャリア信号を生成し、前記重みづけがなされたサブキャリア信号を復号する。
また、本発明の無線通信方法は、マルチキャリア伝送された信号を受信し、前記マルチキャリア伝送に用いる通信帯域を分割した分割帯域毎に、前記分割帯域に属するサブキャリア信号群に含まれる複数のサブキャリア信号を用いて、複数の受信指向性ビームを形成するための受信アレー重みを生成し、前記分割帯域毎に生成された前記受信アレー重みを、前記受信された信号のうち、前記分割帯域に属するサブキャリア信号に乗算することで、複数の重みづけがなされた送信信号を形成し、前記複数の重みづけがなされたサブキャリア信号を復号する。
また、本発明の無線通信方法は、マルチキャリア伝送された信号を受信し、1つの受信アレー重みを生成し、前記受信アレー重みを、前記受信された信号に乗算することで、重みづけがなされたサブキャリア信号を生成し、前記重みづけがなされたサブキャリア信号を復号する。
図1は、本発明の実施の形態1に係る適応アンテナ無線通信装置の構成を示すブロック図である。図1に示す適応アンテナ無線通信装置は、複数Na個のアンテナ素子1−1〜Naから構成されるアレーアンテナ1、第k番目のアンテナ素子1−kで受信された高周波信号s1−kを周波数変換後に、複数Ns個のサブキャリア信号f1−kからfNs−kに分波する分波器2―k(ただし、k=1〜Na)、通信帯域をNd個に分割した分割帯域のうち、第m番目の分割帯域3−mに属するサブキャリア信号群を用いて到来方向推定を行う分割帯域方向推定部4−m、第m番目の分割帯域方向推定部4−mでの方向推定結果を基にアレー重みを生成する分割帯域アレー重み生成部5−m、分割帯域アレー重み生成部5−mによるアレー重みを用いて、第m番目の分割帯域3−mに属するサブキャリア信号群に対し指向性形成するサブキャリア指向性形成部6−m、指向性受信された各サブキャリア信号を用いてデータ復調を行う復調部7から構成されている。ただし、m=1、...、Ndである。なお、図1ではアンテナ素子数Na=2、サブキャリア数Ns=4、分割帯域数Nd=2の場合の構成例を示している。
図5は、本発明の実施の形態2に係る適応アンテナ無線通信装置の構成を示すブロック図であり、実施の形態1で説明した図1の構成での、各分割帯域方向推定部4の方向推定結果を基にサブキャリア毎に送信指向性を形成する動作を行う。なお、分割帯域方向推定部4の方向推定結果が得られるまでのブロック図は実施の形態1と同様であり、省略している。図5における適応アンテナ無線通信装置は、分割帯域方向推定部4の推定結果を基に送信アレー重みを生成するサブキャリア送信重み生成部40、送信サブキャリア信号を送信アレー素子数分だけ複製したそれぞれの信号に、送信アレー重みを乗算するサブキャリア送信指向性形成部41、重み付けされたサブキャリア信号を混合する混合器42、混合器42の出力を無線周波数に周波数変換する無線送信部43から構成される。なお、図5ではアンテナ素子数Na=2、サブキャリア数Ns=2、分割帯域数Nd=2の場合の構成例を示している。以下、図5を用いてその動作の説明を行う。
図6は、本発明の実施の形態3に係る適応アンテナ無線通信装置の構成を示すブロック図であり、実施の形態1で説明した図1に示す構成に、アレーアンテナ1で受信された全てのサブキャリア信号を用いることで全通信帯域での方向推定を行う全帯域方向推定部50と、分割帯域方向推定部4または、全帯域方向推定部50で算出される空間プロファイルを用いることで角度広がり検出し、どちらかの方向推定結果を選択して出力する方向推定結果選択部51とを追加した構成である。なお、分割帯域方向推定部4の方向推定結果が得られるまでのブロック図は実施の形態1と同様であり、省略している。以下、図6を用いて実施の形態1と異なる部分を主に説明を行う。なお、図6ではアンテナ素子数Na=2、サブキャリア数Ns=2、分割帯域数Nd=2の場合の構成例を示している。
図7は、本発明の実施の形態4に係る適応アンテナ無線通信装置の構成を示すブロック図であり、実施の形態2で説明した図5に示す構成に、アレーアンテナ1で受信された全てのサブキャリア信号を用いることで全帯域での方向推定を行う全帯域方向推定部50と、分割帯域方向推定部4または、全帯域方向推定部50で算出される空間プロファイルを用いることで角度広がり検出し、どちらかの方向推定結果を選択して出力する方向推定結果選択部51とを追加した構成である。なお、分割帯域方向推定部4の方向推定結果が得られるまでのブロック図は実施の形態1と同様であり、省略している。以下、図7を用いて実施の形態1と異なる部分を主に説明を行う。なお、図7ではアンテナ素子数Na=2、サブキャリア数Ns=2、分割帯域数Nd=2の場合の構成例を示している。
1―1〜Na アンテナ素子
2―1〜Na 分波器
3―1〜Nd 分割帯域
4―1〜Nd 分割帯域方向推定部
5―1〜Nd 分割帯域アレー重み生成部
6―1〜Nd サブキャリア指向性形成部
7 復調部
Claims (4)
- マルチキャリア伝送された信号を受信するアレーアンテナと、
マルチキャリア伝送に用いる通信帯域を分割した分割帯域毎に、前記分割帯域に属するサブキャリア信号群に含まれる複数のサブキャリア信号を用いて、受信指向性ビームを形成するための1つの受信アレー重みを生成する受信重み生成部と、
前記分割帯域毎に生成された前記受信アレー重みを、前記受信された信号のうち、前記分割帯域に属するサブキャリア信号に乗算することで、重みづけがなされたサブキャリア信号を生成するサブキャリア受信指向性形成部と、
前記重みづけがなされたサブキャリア信号を復号する復号部と
を具備することを特徴とする無線通信装置。 - マルチキャリア伝送された信号を受信するアレーアンテナと、 前記マルチキャリア伝送に用いる通信帯域を分割した分割帯域毎に、前記分割帯域に属するサブキャリア信号群に含まれる複数のサブキャリア信号を用いて、複数の受信指向性ビームを形成するための受信アレー重みを生成する受信重み生成部と、
前記分割帯域毎に生成された前記受信アレー重みを、前記受信された信号のうち、前記分割帯域に属するサブキャリア信号に乗算することで、複数の重みづけがなされたサブキャリア信号を生成するサブキャリア受信指向性形成部と、
前記複数の重みづけがなされたサブキャリア信号を復号する復号部と
を具備することを特徴とする無線通信装置。 - マルチキャリア伝送された信号を受信し、
前記マルチキャリア伝送に用いる通信帯域を分割した分割帯域毎に、前記分割帯域に属するサブキャリア信号群に含まれる複数のサブキャリア信号を用いて、受信指向性ビームを形成するための1つの受信アレー重みを生成し、
前記分割帯域毎に生成された前記受信アレー重みを、前記受信された信号のうち、前記分割帯域に属するサブキャリア信号に乗算することで、重みづけがなされたサブキャリア信号を生成し、
前記重みづけがなされたサブキャリア信号を復号する、
無線通信方法。 - マルチキャリア伝送された信号を受信し、
前記マルチキャリア伝送に用いる通信帯域を分割した分割帯域毎に、前記分割帯域に属するサブキャリア信号群に含まれる複数のサブキャリア信号を用いて、複数の受信指向性ビームを形成するための受信アレー重みを生成し、
前記分割帯域毎に生成された前記受信アレー重みを、前記受信された信号のうち、前記分割帯域に属するサブキャリア信号に乗算することで、複数の重みづけがなされた送信信号を形成し、
前記複数の重みづけがなされたサブキャリア信号を復号する
無線通信方法。
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BR112019022560A8 (pt) | 2017-04-28 | 2023-04-11 | Fraunhofer Ges Forschung | Estimativa de componente especular em uma rede de comunicação sem fio |
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JP3577944B2 (ja) * | 1998-03-31 | 2004-10-20 | 株式会社豊田中央研究所 | アダプティブ受信装置 |
JP3576099B2 (ja) * | 2000-12-22 | 2004-10-13 | 株式会社東芝 | スマートアンテナを用いた受信装置、スマートアンテナを用いた受信方法及びビーム形成回路 |
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