Tunnels are typical global navigation satellite system(GNSS)signal rejection environments,and existing receivers are unable to receive signals and realize reliable positioning in tunnels.Now,on the basis of the existing receiver hardware platform and adaptive software upgrading of the receiver algorithm,a tunnel positioning method is proposed;Firstly,the signal environment for re-ceiver positioning is built in the tunnel through the leaky cables and pseudo-satellites,and then the positioning algorithm of the receiv-er 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,and the constructed signal has an good environment;The positioning errors of the receiver are within 5 m in the constructed signal environments with the static and moving states,which can satisfy the require-ments for positioning in tunnels.
关键词
卫星导航/隧道定位/伪卫星/漏缆/远近效应
Key words
satellite navigation/tunnel positioning/pseudo-satellite/leaky cables/distance and proximity effects
维普
万方数据