一种伪卫星实现隧道定位的方法及验证

A Pseudo-Satellite Method to Realize Tunnel Positioning and Validation

摘要:

隧道为典型的GNSS信号拒止环境，现有接收机无法在隧道内正常接收信号并实现可靠的定位。现提出一种基于已有接收机硬件平台，通过适应性升级接收机算法软件的方式实现隧道定位的方法；首先通过漏缆以及伪卫星在隧道内搭建用于接收机定位的信号环境，再对接收机定位算法进行改进，使得接收机可以在隧道内完成定位；测试试验结果表明，接收机在隧道内接收到的信号的载噪比稳定，上下浮动幅度不超过1 dB，接收机捕获跟踪信号的相关峰稳定，所搭建的信号环境良好；接收机在所搭建的信号环境中静止状态及移动状态下定位误差均在5 m以内，满足隧道内定位的需求。

Abstract:

Tunnels are typical GNSS signal rejection environments, and existing receivers are unable to receive signals and realize reliable positioning in tunnels. Now, a method is proposed to realize tunnel positioning based on the existing receiver hardware platform and adaptive upgrading of receiver algorithm software; firstly, the signal environment for receiver positioning is built in the tunnel through leaky cables and pseudo-satellites, and then the positioning algorithm of the receiver is improved, so that the receiver can complete the positioning in the tunnel; the test results show that the carrier-to-noise ratio of the signals received in the tunnel is stable, with an upward and downward fluctuation of no more than 1 dB, and the correlation peaks of the tracked signals captured by the receiver are stable. The test results show that the carrier-to-noise ratio of the signal received by the receiver in the tunnel is stable, with an upward and downward fluctuation of no more than 1 dB, and the correlation peaks of the tracking signal captured by the receiver are stable, so that the signal environment constructed is good; and the positioning errors of the receiver in the static state and the moving state in the signal environment constructed are within 5 m, which can satisfy the requirements for positioning in tunnels.