The Decoding Method Study of DSC Signal

As the progress of information technology and intelligence gathering technology, marine communication services has already become an important platform to integrate ocean measure, safety of shipping and marine weather information. The Digital Selective Calling (DSC) under Global Marine Distress and Safety System (GMDSS), the existing software and equipment need to rely on foreign manufacturers. The maintenance cost is high, and the existing display interface of the software can only indicate the information of the vessels in distress by text message. In order to improve above-mentioned shortcoming, the aim of this paper is to integrate Automatic Identification System (AIS) and DSC to study the decoding method of DSC signal. The study can be divided into three phases. In the phase one, we study the registers of EV8850 microcontroller with PE0003 microcontroller to carry out the acquisition and decoding of the DSC signal. In the phase two, the format decoded DSC signals are classified as we need and uploads to the DSC database. In the final phase, finished AIS and DSC real-time information system to show the decoded results.