RADIO COMMUNICATIONS SYSTEM, BASE STATION DEVICE, TERMINAL STATION DEVICE, AND RADIO COMMUNICATION METHOD

PROBLEM TO BE SOLVED: To actualize large transmission capacity while obtaining a high directivity gain even when a terminal station device moves at a high speed.SOLUTION: A base station device of a radio communication system comprises: weight vector storage means of storing, associatively with posit...

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Main Authors OKUMURA YUKIHIKO, KUROSAKI SATOSHI, SUYAMA SATOSHI, OTA ATSUSHI, MARUTA KAZUTERU, IIZUKA MASATAKA, SHIRATO YUSHI, IWAKUNI TATSUHIKO, ARAI TAKUTO, OBARA TATSUNORI
Format Patent
LanguageEnglish
Japanese
Published 16.02.2017
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
MULTIPLEX COMMUNICATION
TRANSMISSION
WIRELESS COMMUNICATIONS NETWORKS
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Summary:PROBLEM TO BE SOLVED: To actualize large transmission capacity while obtaining a high directivity gain even when a terminal station device moves at a high speed.SOLUTION: A base station device of a radio communication system comprises: weight vector storage means of storing, associatively with positions in a route where a vehicle moves, transmission weight vectors calculated in advance based upon a plurality of pieces of channel information obtained in advance respectively for the positions as a plurality of channel information between a plurality of first antenna elements and a plurality of second antenna elements; position acquiring means of acquiring positions of the vehicle; and transmission signal processing means of acquiring transmission weight vectors corresponding to the positions obtained by the position acquiring means based upon information recorded in weight vector recording means, generating signal vectors by multiplying signals obtained by modulation processing on data to be transmitted to the terminal station device by the acquired transmission weight vectors, and transmitting signals based upon respective components of the generated signal vectors from the corresponding first antenna elements.SELECTED DRAWING: Figure 41 【課題】端末局装置が高速で移動する場合においても高い指向性利得を得ながら伝送容量の大容量化を実現する。【解決手段】無線通信システムにおける基地局装置は、複数の第１のアンテナ素子と複数の第２のアンテナ素子との間の複数のチャネル情報であって且つ車両が移動する経路上の位置ごとに事前に取得された複数のチャネル情報に基づいて事前に算出された送信ウエイトベクトルそれぞれを位置に対応付けて記憶するウエイトベクトル記憶手段と、車両の位置を取得する位置取得手段と、位置取得手段により得られた位置に対応する送信ウエイトベクトルをウエイトベクトル記憶手段に記録された情報を基に取得し、取得した送信ウエイトベクトルを端末局装置宛に送信するデータに対して変調処理を施して得られた信号に乗算した信号ベクトルを生成し、生成した信号ベクトルの各成分に基づく信号を対応する第１のアンテナ素子から送信する送信信号処理手段とを備える。【選択図】図４１
Bibliography:Application Number: JP20150157807