GPS中伪随机码生成原理的研究

Study on the creation theory of PRN code in GPS

目前,伪随机码在扩频通信中的应用非常广泛,这一技术也在卫星导航系统中得到了利用。在GPS中,导航卫星向用户发送的导航定位信号,就是利用伪随机码传送导航电文的调相信号。基于伪随机码的产生原理,详细论述了GPS中伪随机码的生成方法,并用MTALAB中的SIM-LINK工具箱对GPS中的伪随机序列的生成进行了仿真。此仿真方法简单直观,值得借鉴。

At present, PRN（pseudo random noise） cede has been applied extensively to spread spectrum communications, including the application in satellite navigation systems. In GPS-global position system, the signal which is transmitted to users by the navigation satellites is the phase - modulated signal that just uses PRN code to send navigation information. This article discusses on the generation approach of the PRN cede of GPS particularly based on generation principle of PRN cede, moreover, the simulation of generating the PRN cede of GPS using SIMLINK toolbox of MATLAB is presented. This simulation methed is simple and intuitional, so it can be kept for reference in the related work.