The Design And Realization Of Imarsat&Compass Communication Terminal

IMARSART is a communication satellite as a relay station using a radio communication system vessel. It has the world(except the poles outside the region),full-time, all-weather, stable, reliable, high-quality, large capacity and automatic communication and other significant advantages. Beidou satellite navigation system developed by China’s global satellite positioning and communication systems.Available worldwide weather, all kinds of time to provide users with high-precision,highly reliable positioning, navigation and timing services, and a short message communication capabilities. This topic is based on maritime satellite system and the Beidou navigation system designed for a Marine / Beidou navigation terminal mode.The terminal can be used for voice communication, SMS communication, e-mail communications, data transmission, navigation and other functions.This paper introduces the maritime satellite communication systems and Beidou satellite navigation system structure, function, working principle and applications.Through the introduction of other products they made in the field of communications and navigation widely used, and in China has been actively developed.This paper describes the next Maritime / Compass dual mode terminal applications, the technical characteristics of the terminal, the main function, key technologies and application methods. The end users of the ocean to meet the communications, maritime navigation, distress relief, beach warning and many other needs. Achieve a global seamless communication and navigation navigation featuresThis article focuses on research work in the terminal hardware design and software design. First details of the overall design of the terminal as well as the modular unit implementations. Second highlight of the optional hardware control chip and the Android operating system-based software development. Describes the platform architecture and program development process, and the terminal’s key technologies:speech coding, channel coding, interleaving, encryption, modulation and demodulation technology is introduced. Next comes the workflow include: initiating caller, called to answer, short message, add waypoints and routes, navigation, alarms, and Beidou information.