一种导航卫星系统混合信号和导频信号偏差标定方法
By introducing the principle of minimizing the inter-symbol deviation within the ionosphere-free combined frequency and the L1 norm of the wide-lane UPD difference into the parameter estimation, the problem of inconsistent reference for the deviation calibration of mixed signals and pilot signals in satellite navigation systems is solved, thereby improving the accuracy and consistency of ambiguity-fixed precision single-point positioning.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HUAZHONG UNIV OF SCI & TECH
- Filing Date
- 2025-11-20
- Publication Date
- 2026-07-17
AI Technical Summary
In existing technologies, the methods for calibrating the deviation between mixed signals and pilot signals in precise orbit determination and positioning of satellite navigation suffer from problems such as inconsistent benchmarks and inaccurate deviation calculations, which affect the accuracy and efficiency of precise single-point positioning with fixed ambiguity.
In parameter estimation, an inter-symbol bias within the combined frequency band without ionosphere is introduced. Only one set of satellite clock biases is estimated. The difference between the two sets of wide-lane UPDs is determined by minimizing the L1 norm of the wide-lane UPD difference between pilot and mixed signals, thereby optimizing the calibration of the mixed signal and pilot signal biases of the navigation satellite system.
It improves the accuracy of fixed-precision single-point positioning with ambiguity, ensures the consistency of phase deviation, mitigates the influence of different references, and the generated deviation product is used in PPP-AR to improve positioning accuracy.
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Figure CN121454577B_ABST