摘要
针对单一卫星导航系统由于观测条件及使用权限的限制,其定位精度、可靠性和可用性有时无法保障的问题,提出一种GPS/BDS总体最小二乘载波相位定位算法:采用M-W组合的方法求解载波相位宽巷整周模糊度,进而求解载波相位模糊度;采用总体最小二乘法进行参数估计得到定位结果,以解决最小二乘在参数估计中只考虑观测向量误差而忽略系数矩阵误差的问题;最后对总体最小二乘估计的GPS/BDS双系统与GPS和BDS单系统分别进行载波相位测量的PDOP值和定位精度比较,结果显示双系统PDOP结果明显优于单系统;总体最小二乘估计的GPS/BDS载波相位测量精度高于GPS和BDS。
Aiming at the problem that due to the limitation of observation conditions and restrictive permissions,the positioning accuracy,reliability and availability of a single navigation satellite system sometimes cannot be guaranteed,the paper proposed a method of GPS/BDS carrier phase positioning based on total least squares：M-W combination method was used to solve the wide lane integer ambiguity of carrier phase,then the ambiguity of carrier phase;in order to overcome the error of the coefficient matrix,the result of parameter estimation was obtained by using the total least square method.Finally,the PDOP value and the positioning accuracy of the carrier phase measurements were compared between the GPS/BDS dual system with the total least squares estimation,GPS system and BDS system.Result showed that the PDOP of the double system would be better than that of the single systems,and the measurement accuracy of GPS/BDS carrier phase with the total least squares estimator would be better than that of GPS or BDS single system.
出处
《导航定位学报》
CSCD
2017年第3期67-71,共5页
Journal of Navigation and Positioning
