Anavigation Information Concealment Method Based On Compressive Sensing

GPS can provide enough position, velocity and time information for different users worldwidely. The present four navigation systems can provide sufficient navigation re-sources for positioning. But not all these resources are open to the public. Thus, there is a need to develop certain concealment method for our satellite navigation system, which can both enhance the system security and reliability and get rid of the dependence on foreign satellite systems.Concerning the special structure of navigation information, we propose a naviga-tion information concealment method based on compressed sensing and introduce a feasible theoretical framework. Firstly, the principles of and typical methods for infor-mation concealment and compressing sensing are introduced. Secondly, typical infor-mation concealment methods are improved to enhance the robustness and security of the system. Then, according to the requirement for navigation, the construction method of the measurement matrix is researched, which makes the measurement matrix share the feature of C/A code and is helpful for improving the reliability and availability of the system. Finally, numerical experiments demonstrate the feasibility of the proposed and the advantage of navigation information concealment.