Design methodology of space-based AIS receiver for multimessage reception

It is proposed a new methodology of space based AIS receiver for multi-message reception in this paper. A power stratified model for multi-message reception is constructed within the satellite coverage, according to the transmitted principle of AIS (Automatic Identification System) message on the ground. The formula of received power for multi-message reception is derived. On the basis of this, the dynamic range for multi-message reception is obtained by calculating the received sensitivity,maximum received power of a single message and cell number for each layer cell. To meet this design requirement, a design method of space based AIS receiver with high sensitivity and large dynamic range is described, using the relationship between received dynamic range and ADC(Analog-to-Digital Converter) quantization number as the design constraint. This design method not only satisfies the power requirement of multi-message reception, but also be suitable for the burst characteristics and conforms to the design constraints of low cost and improved reliability. This paper provides theoretical support for design requirement analysis and index demonstration of space based AIS receiver.