The Performance Optimization And Realization Of The Space-based AIS Simulation Signal Source

The appearance of the space-based AIS system is to solve the shore-based group supervision offshore platform technology which has been unable to meet the needs of today’s emerging maritime administration.The space-based AIS system simulation platform is divided into three modules,signal analog source module,demodulation module and analysis module.Space-based AIS signal analog source provide data base of the entire system.Its accuracy becomes key factor to reflect the quality of the space-based AIS analog source.while it can output signals which can conformity with AIS signal standards,there are still three questions that ships uniformly distributed model can not reflect the true distribution of the ship,Gaussian channel model can not accurately simulate satellite channels and analog signal source can not output characteristic signals.In this paper,there are three points to improve it and provide protection for the correctness of the follow-up study.First,the paper describes the significance and status of research in this paper,the original function onboard AIS signal analog source modules are outlined.Then,each of the original analog signal source space-based AIS ship uniform distribution model,Gaussian model and analog output signal source technology to achieve three key principles introduced in detail,and these three problems of technology to do a thorough analysis.Made available onboard AIS analog source problems lead back solution.Next,the paper ship uniform distribution model previously mentioned,models and satellite channel analog output signal source there are three defective sub-section presents a global recognition technology relies on digital distribution model ship,Lutz satellite channel model simulation and satellite channel design and implementation onboard solutions AIS signal simulator test module for future research onboard AIS signal analog source module has a certain significance.Finally,the paper summarizes the contents of the previous chapters,also need to be optimized to the point has been described,provide a basis for further research.