无线电工程

近年来，随着科技的不断进步，人们对导航定位的要求越来越高，促使导航定位技术不断革新。然而在很多场景下，传统的卫星定位技术并不能很好地解决定位问题，包括精度要求不满足、定位结果不连续以及定位时间过长等。一种基于北斗卫星导航系统和5G定位技术的联合定位系统可以用来解决上述问题，系统主要由5G定位网络、时间同步设备和接收终端3部分组成。在算法方面，基于北斗和5G的定位方程建立联合定位的数学模型，并利用最小二乘法中的高斯-牛顿法将非线性方程转换为线性方程，通过公式推导，得到迭代后的终端定位结果。系统仿真后的定位精度可达到3.934 m。搭建实验平台验证联合定位系统的可行性。测试表明，静态定位精度约为3.14 m,动态定位精度约为4.51 m。

In recent years, with the development of science and technology, the requirements for navigation and positioning are getting higher and higher, which has promoted the innovation of navigation and positioning technology.However, the problems in positioning cannot be well solved by the traditional satellite positioning technology in many scenarios, including unsatisfactory accuracy requirements, discontinuous positioning results, and excessive positioning time.To solve the above problems, a joint positioning system based on BDS and 5 G positioning technology is proposed.The system is mainly composed of 5 G positioning network, time synchronization equipment and receiving terminal.In terms of algorithm, a joint positioning mathematical model is established based on the positioning equation of BDS and 5 G.The Gauss-Newton method in the least square method is used to convert the nonlinear equation into a linear equation, and the iterated terminal positioning results are obtained through formula derivation.After simulation, the positioning accuracy of the system can reach 3.934 m.Finally, an experimental platform is built to verify the feasibility of the joint positioning system.The test results show that the static positioning accuracy was about 3.14 m, and the dynamic positioning accuracy was about 4.51 m.