TDOA高精度短波定位系统研究与设计

Research and Design of High Precision Short Wave Positioning System Based on TDOA

摘要:

为了解决现有短波无线电监测定位系统中存在接收机系统复杂、定位精度不高的问题,设计了一种基于TDOA高精度短波定位系统；该系统采用软件无线电设计架构,射频前端采用直接带通采样,通过FPGA和CPU进行基带IQ数据提取和传输,采用TDOA和粒子算法对位置干扰源进行估计和定位；并且采用了GPS和PLL相结合时钟方案,以及VPN的数据传输通道；给出了短波定位系统的框图,分析了系统子模块和工作原理；采用该系统对已知的短波信号进行定位,实验结果证明优于传统的定位手段；说明该系统具有使用方便、布站灵活和定位精度高的特点。

Abstract:

In order to solve the problems of complicated receiver system and the poor positioning precision of the existing shortwave radio monitoring and positioning system ,designs a high precision positioning system based on TDOA short wave. The system adopts the software radio architecture design, using radio frequency direct bandpass sampling,extracts and transmits the baseband IQ data through FPGA and CPU,estimates and locates the interference source by the TDOA and particle algorithm;and adopts the combined GPS and PLL clock scheme,as well as VPN data transmission channel; gives a block diagram about the short wave positioning system, analyzes the system module and the working principle.Positioning this known shortwave signal by using this system,experimental results show that the positioning means is superior to the traditional;it shows that the system has the advantages of convenient use,flexible placement and high positioning accuracy.