PROBLEM TO BE SOLVED: To flexibly cope with an orbital position and observation sea area special to an artificial satellite, a peripheral land terrain, and various changes in relative ship distribution involved in those without using a large-scale antenna system.SOLUTION: An AIS signal receiving system independently receives an AIS signal transmitted by a ship 3 via each of a plurality of AIS antennas 22-22mounted on an artificial satellite 2, forms desired antenna beams S-Son digital with a DBF, and observers each of the received AIS signals according to the formed antenna beams S-S.SELECTED DRAWING: Figure 3
【課題】大規模なアンテナシステムを用いずに人工衛星ならではの軌道位置や観測海域、周辺陸域地形、それに伴う相対的な船舶分布の多様な変化に柔軟に対応すること。【解決手段】、船舶3から送信されるAIS信号を、人工衛星2に搭載した複数のAISアンテナ221〜22nを介してそれぞれ独立して受信し、DBFによりデジタル上で所望のアンテナビームS1〜Snを形成し、形成したアンテナビームS1〜Snに応じて、受信した各AIS信号を観測する。【選択図】図3
AIS SIGNAL RECEIVING SYSTEM AND AIS SIGNAL RECEIVING METHOD
AIS信号受信システム及びAIS信号の受信方法
2018-01-11
Patent
Electronic Resource
Japanese
RECEIVING APPARATUS FOR RECEIVING SIGNAL CONTAINING PREDETERMINED INFORMATION
European Patent Office | 2015
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