北斗信号体制下三频CIR法模糊度解算方法研究

未来的GNSS系统将广泛使用三个频点的载波信号，极大地推动了利用载波对用户位置和速度等信息进行高精度解算方法的研究。利用载波进行高精度解算的关键是高成功率的确定载波相位整周模糊度。CIR算法基于整数引导估计准则确定载波相位模糊度整数解，算法实现简单，模糊度解算成功率较高，具有很大的实际应用价值。然而目前CIR法在实际应用中主要针对GPS信号体制，在北斗信号体制下是否具有良好的性能还有待验证。本文将CIR法应用于北斗信号体制下三频载波整周模糊度的解算，利用仿真数据对算法进行验证，并将解算结果与GPS信号体制下解算结果进行对比，验证CIR法在北斗信号体制下的可行性，分析不同信号体制下CIR法的解算性能和适用范围。

Study of Three Frequency Ambiguity Resolution Based on CIR in Beidou Carrier System

Three frequency carriers will be broadly used in GNSS systems in the future, which is promoting the study of methods of calculating user＇s position and velocity precisely. The primary problem of carrier resolution is to calculate the integer ambiguity of carrier phase. CIR（cascade integer resolution） is a simple but efficient method in solving the ambiguity problem, which is valuable. But CIR is a method which is adapted to GPS carrier system, whether can it be efficient used in Beidou carrier system still need demonstration. Consequently, We use CIR to solve ambiguity problem in Beidou carrier system to check the availability, and the adaptability between different GNSS system by paralleling the resolution results of the GPS and Beidou system.