一种改进的民用GPS异步欺骗技术

针对民用全球定位系统(Global Positioning System,GPS)欺骗中存在的欺骗信号伪码相位同步问题，通过欺骗建模分析得到了主要误差来源于探测系统定位精度。基于传统单路滑动牵引入锁技术，理论分析了功率损失主要来源于载波偏差。针对工程应用中欺骗信号构造时初始码相位超前滞后的不确定带来的欺骗起效时间二值性，提出基于码片误差滞后扩展处理的改进技术，并利用多路并发滑动优化单路滑动时间过长问题。通过软件接收机、商用接收机实验验证了改进的滑动入锁技术在实际应用中具有欺骗起效时间短、欺骗更可靠的特点。该研究成果可为民用GPS欺骗技术研究人员提供参考。

An Improved Civilian GPS Asynchronous Spoofing Technology

For the problem of pseudo code phase synchronization of spoofing signals in civilian global positioning system(GPS) spoofing,this paper,through analysis,obtains the conclusion that the main error originates from the positioning accuracy of the detection system by building spoofing models.According to the theoretical analysis,in the traditional single-path sliding traction lock technology,the power loss mainly comes from the carrier deviation.In engineering applications,the binary nature of the spoofing onset time is caused by the uncertainty of the initial code phase leading lag when constructing the spoofing signal.Thus,an improved technique based on chip error lag extension processing is proposed and multiple concurrent sliding is used to optimize the time consumed compared with one-way slide.The software receiver and commercial receiver are used in the experiments to verify that the improved sliding lock technology has the characteristics of shorter onset time and more reliable spoofing in practical applications.The research results can provide a reference for civilian GPS spoofing technology researchers.