Aimed at the problem that the existed satellite navigation positioning method is difficult to achieve accurate vehicle positioning in the tunnel environment,a tunnel vehicle positioning method based on single base station(BS)for the rectangular tunnel environment is proposed.The virtual BS is established according to the structural characteristics of the tunnel walls.By considering the single reflection paths from the tunnel walls,a positioning model is established according to the Time of Arrival(TOA)information of each path from the positioning BS and the virtual BS.The two step weighted least squares(TSWLS)method is used to solve the objective function to obtain the precise positioning of the vehicle in the tunnel.The simulation re-sults show that the proposed method can effectively achieve vehicle positioning in the tunnel,and has higher positioning accura-cy.When the single BS positioning method based on TSWLS method is used to locate the target vehicle,its positioning accura-cy is better than that of the traditional single BS positioning method based on weighted least squares method.
关键词
单基站/隧道/两步加权最小二乘法/虚拟基站
Key words
single base station/tunnel/two step weighted least squares method/virtual base station
维普
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