【作者】 况鸿凤； 朱立东； 杨波；

【Author】 KUANG Hong-feng;ZHU Li-dong;YANG Bo;National Key Laboratory of Science and Technology on Communications,UESTC;

【机构】 电子科技大学通信抗干扰技术国家级重点实验室；

【摘要】 整周模糊度的求解是载波相位定位的关键技术。在经典的LAMBDA算法中,对整个搜索过程收敛速度影响最大的是协方差矩阵,其中协方差矩阵相关性的优劣决定了整周模糊度的解算效率。为了降低LAMBDA算法中协方差矩阵的相关性,本文对Z变换和增大观测时间的间隔两种方式进行了理论分析,并用MATLAB进行了仿真。仿真结果表明,两种方法均能大大降低整周模糊度求解的复杂度,可以为载波相位定位提供技术支持。更多还原

【Abstract】 Integer ambiguity resolution plays an important role in carrier phase positioning.The covariance matrix of the variables mostly effect the convergence rate of the entire search process in LAMBDA algorithm,and the efficiency of integer ambiguity resolution is influenced by the correlation of covariance matrix.In order to reduce the correlation of covariance matrix in LAMBDA algorithm,in this paper,we use Z transform and increase the interval of the observation time to enhance the performance of the integer ambiguity resolution,and simulate by MATLAB.The results show that the two methods can greatly reduce the complexity of the integer ambiguity resolution.更多还原