矢量结构对载波相位的预测

Prediction of carrier phase by vector structure

高精度定位通常采用载波相位测距,而当全球导航卫星系统(GNSS)接收机信号受到遮挡、存在干扰等环境影响时,载波相位易出现跟踪不连续的问题,从而影响定位精度。针对这一问题提出了一种采用矢量结构对载波相位的预测方法,预测值辅助载波相位的跟踪,为了使预测值对载波相位跟踪效果更好,使用接收信号的质量确定预测值对载波相位的影响比例。最后,试验验证了通过矢量结构对载波相位进行预测,有效地改善了载波相位的跟踪能力,从而对载波相位连续跟踪,并有效地提高定位精度。

Carrier phase ranging is usually used for high-precision positioning.When the signal of the Global Navigation Satellite System(GNSS)receiver is affected by occlusion,interference and other environments,the carrier phase is prone to the problem of discontinuous tracking,which affects the positioning accuracy.To solve this problem,this paper proposes a carrier phase prediction method using the vector structure.The predicted value assists carrier phase tracking.To achieve better tracking of the carrier phase with the predicted value,the influence proportion of the predicted value on the carrier phase is determined by the quality of the received signal.Finally,the experiment verifies that prediction of the carrier phase through the vector structure can effectively improve the tracking ability of the carrier phase,so as to keep a continuous tracking of the carrier phase and effectively improve the positioning accuracy.