基于压缩感知的导航信息隐藏方法研究

发布时间：2018-05-25 01:32

本文选题：导航信息 + 信息隐藏　；参考：《西安电子科技大学》2014年硕士论文

【摘要】：全球导航卫星系统可以为全球范围内不同性质、数量不限的用户提供足够的位置、速度和时间信息。目前,国际上的四大导航系统都可以提供足够的导航定位资源用于完成全球定位。然而这些定位资源并不是全部对外开放,需要一定的特权。针对于此,有必要为我国的卫星导航系统研究特有的导航信息隐藏方式,在提高系统安全性和可靠性的同时摆脱依赖于国外卫星系统的现状。本文针对导航信息的特殊结构,研究了基于压缩感知的导航信息隐藏方法,并提出了一种可行的理论框架。首先介绍信息隐藏和压缩感知的基本理论和典型方法；其次,在常用的信息隐藏方法的基础上,进行一定程度的改进,有效提升系统的鲁棒性和安全性；再者,针对导航定位的实际需求,通过研究压缩感知中测量矩阵的构造方式,使测量矩阵具备传统导航系统中C/A码的特性,用来提高系统的可靠性和有效性。最后,通过数字仿真结果证明了本文方法的正确性以及在导航信息隐藏系统应用的优势。
[Abstract]:GNSS can provide enough location, speed and time information for a wide variety of users worldwide. At present, the four international navigation systems can provide enough navigation and positioning resources to complete global positioning. However, these positioning resources are not all open to the outside world, need a certain degree of privilege. In view of this, it is necessary to study the unique navigation information hiding method for the satellite navigation system of our country, in order to improve the security and reliability of the system and get rid of the status quo of relying on the foreign satellite system at the same time. Aiming at the special structure of navigation information, this paper studies the method of hiding navigation information based on compressed sensing, and puts forward a feasible theoretical framework. Firstly, the basic theory and typical methods of information hiding and compression perception are introduced. Secondly, based on the commonly used information hiding methods, some improvements are made to effectively enhance the robustness and security of the system. According to the actual requirement of navigation and positioning, the measurement matrix is constructed by studying the construction method of measurement matrix in compressed perception, so that the measurement matrix has the characteristics of C / A code in traditional navigation system, which is used to improve the reliability and effectiveness of the system. Finally, the digital simulation results show the correctness of this method and the advantages of the application in navigation information hiding system.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN967.1

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