基于RDSS和RNSS的高精度定位系统设计

Design of high precision positioning system based on RDSS and RNSS

摘要:

针对飞行器或航海船舶的定位问题，设计了一套基于RDSS和RNSS的高精度定位系统。通过对定位、通信模块的选型以及相关技术原理分析，提出了采用北斗模块实现落点定位的系统设计方案。系统采用RNSS定位，通过RDSS进行通信。为了提高短报文通信频度，采用双北斗模块轮流通信的方案设计。为了应对落点区域以及飞行器飞行过程中复杂的环境，提高定位和短报文通信质量，系统使用了10W的PA功率放大模块，对RDSS通信信号进行放大。定位系统由信标机和地面接收设备两部分组成。信标机负责定位和RDSS通信，地面接收系统负责处理数据实现残骸的落点定位。系统经实际应用检测，可以将通信频度有原来的1次/min提高至2次/min的，通信丢包率小于5%；系统采用GPS/北斗双模定位技术，定位精度最高可以优于5m。信标机内部设计了充电电路，可以反复给设备充电，大容量锂电池可以保证信标机可以长时间工作，最长工作时间可以达到3h。该系统解决了飞行器、航海船舶定位问题，具有实时性强、通信频度高、定位精度高、体积小、适用强和发射功率大等特点。

Abstract:

high-precision positioning system based on RDSS and RNSS is designed for the positioning of aircraft or marine vessels. Through the analysis of positioning, communication module selection and related technical principles, the system design scheme of using Beidou module to achieve drop-off positioning is put forward. The system uses RNSS positioning to communicate through RDSS. In order to improve the frequency of short message communication, the scheme design of rotating communication of dual Beidou module is adopted. In order to cope with the drop-off area and the complex environment during the flight of the aircraft and improve the quality of positioning and short message communication, the system uses a 10W PA power amplification module to amplify the RDSS communication signal. The positioning system consists of beacon machine and ground receiving equipment. Beacon machine is responsible for positioning and RDSS communication, ground receiving system is responsible for processing data to achieve the location of debris. The system can be detected by practical application, the communication frequency can be increased to 2 times/min, the communication drop rate is less than 5%, and the system adopts GPS/Beidou dual-mode positioning technology, the positioning accuracy can be better than 5m. Beacon machine designed internal charging circuit, can repeatedly charge the device, large-capacity lithium battery can ensure that beacon machine can work long hours, the maximum working time can reach 3h. The system solves the problem of aircraft and marine ship positioning, which has the characteristics of strong real-time, high communication frequency, high positioning accuracy, small size, strong application and high transmission power。