基于TDMA体制的多机协同定位方法

Multi-machine Collaborative Positioning Method Based on TDMA System

目前航空搜救应用最广泛的超短波测向和测距技术,存在角度测量模糊和信号碰撞的问题,这对于海上有效搜救极为不利。针对此问题,提出一种基于TDMA体制的多机系统定位方法,实现了防碰撞网络节点、时隙和信道设计。网络中所有直升机节点均能独立完成测距测向,中心节点与普通节点根据选举策略相互切换,利用组网获取的节点共享信息,并借鉴TDOA定位理论,实现了高精度测向,提高海上搜救定位能力。

At present,ultrashort wave direction finding and ranging technology,which is the most widely used in aviation search and rescue,has the problems of angle measurement ambiguity and signal collision,which is extremely unfavorable for effective maritime search and rescue.Aiming at this problem,a multi-machine system positioning method based on TDMA system is proposed,which realizes the design of anti-collision network nodes,time slots and channels.All helicopter nodes in the network can independently complete the ranging and direction finding.The central node and the ordinary node are switched according to the election strategy.The nodes obtained from the network are used to share information by using TDOA positioning theory,which realizes direction finding accuracy and improves search and rescue positioning capability at sea.