Automatic identification system (AIS) receiving device installed on e.g. airplane, has signal processing device to determine reception directivity pattern based on position information in response to AIS-radio signals

摘要

The receiving device (10) has AIS receiving antenna (11) arranged on a flying object for reception of AIS-radio signals. A position determination unit (12) determines position information related to AIS radio signals received within preset time periods. A signal processing device (13) determines reception directivity pattern based on position information in response to AIS-radio signals of different AIS radio cells received at different time periods. The individual radio signal is determined from superimposed signals based on reception directivity pattern. An independent claim is included for a method for receiving AIS radio signal emitted from transmission unit.