联合V2X通信和最小跳数距离的车辆定位方法

针对传统V2X定位方法定位成功率及定位精度较低的问题，提出了一种联合V2X通信和最小跳数距离的车辆定位方法。车辆利用最小跳数距离估算自身与通信范围外辅助节点间的相对距离，并利用路径相似度因子最高的辅助节点对该误差进行补偿，从而改善定位性能受通信距离约束的局限性。同时，综合考虑距离、辅助节点类型对定位性能的影响，利用加权最小二乘法对车辆位置坐标进行解算，提升定位的精度。仿真结果表明，所提定位方法与V2X定位方法相比，在定位成功率及定位精度方面分别提升38.6%和12.5%，具有一定的应用价值。

Vehicle location by combining V2X communication and minimum hop distance

For the problem of low positioning success rate and low positioning accuracy of traditional V2X positioning method,a vehicle positioning method combining V2X communication and minimum hop distance is proposed.The vehicle uses the minimum hop distance to estimate the relative distance between itself and auxiliary nodes outside the communication range,and uses the auxiliary node with the highest path similarity factor to compensate for the error,thereby improving the limitation of positioning performance constrained by the communication distance.At the same time,comprehensively considering the influence of distance and auxiliary node types on positioning performance,the weighted least square method is used to solve the vehicle position coordinates to improve the positioning accuracy.Simulation results show that compared with the V2X positioning method,the proposed positioning method improves the positioning success rate and positioning accuracy by 38.6% and 12.5% repectively,and has certain application value.