基于基线长度约束的载波相位模糊度解算算法

Ambiguity Resolution of Carrier Phase With Baseline Length Constraint

载波相位模糊度固定是载波相位高精度定位技术中的关键问题。针对动态遮挡环境下载波相位模糊度固定成功率不高的问题,提出了一种利用已知基线长度作为约束条件,提高模糊度固定成功率的算法,仿真结果表明,在城市遮挡严重路段,模糊度固定成功率可从75.3%提高到89.0%,1.462m基线长度条件下,定位误差标准差小于1cm.

Ambiguity resolution is the key problem in high-precision positioning technology.For the problem of low success rate of ambiguity resolution in challenged environment,a modified ambiguity resolution algorithm is proposed.The algorithm is able to increase the success rate of ambiguity resolution by using baseline length constraint.The simulation results show that the success rate can be increased from 75.3%to 89%in some challenge environment,and the positioning error is less than 1cm under the condition of 1.462 mbaseline.