智能手机广域精密定位研究

智能手机作为位置服务的重要载体，由于其天线结构等因素，导致利用手机原始观测值进行定位不能满足高精度定位的需求。针对这一问题，提出了利用广域增强技术，提高手机单频原始观测值实时定位精度的方法。首先，针对手机观测值周跳较为严重的问题，对单频载波相位观测值进行了周跳探测。然后，利用手机观测值获取的伪距、载波相位以及IGS站播发的轨道和钟差改正实现增强定位。实验结果表明，定位精度收敛到1m约需要20min，收敛后水平方向和垂直方向精度分别提高了66.7%和28.9%，平面精度达到1.5m。

Research on Wide-area Precise Positioning of Smartphone

As an important carrier of location service, smartphone cannot meet the demand of high precision location by using phone raw observations because of its antenna structure and other factors. Aiming at this problem, a method to improve the real-time positioning accuracy of smartphone single-frequency raw observations by using wide-area enhancement technology is proposed. Aiming at the serious problem of cycle slip of smartphone raw observations, the cycle slip detection of single-frequency carrier phase observation is carried out.Enhanced positioning is realized by using pseudorange, carrier phase, orbit and clock error correction of IGS station. Experiments show that it takes 20 minutes for the positioning accuracy to converge to 1m.After convergence, the horizontal and vertical accuracy are increased by 66.7% and 28.9% respectively, and the plane accuracy is up to 1.5m.