一种基于多谐波分量的卫星导航MBOC信号无模糊跟踪方法及系统
By using a fuzzy-free tracking method for satellite navigation MBOC signals based on multiple harmonic components, multiple orthogonal local subcarriers are generated and the phase estimates are updated. This solves the problem of poor ranging accuracy of multiplexed binary offset carrier modulated signals and achieves high-precision fuzzy-free tracking ranging.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SUN YAT SEN UNIV
- Filing Date
- 2026-03-06
- Publication Date
- 2026-07-17
AI Technical Summary
Existing multi-harmonic multi-channel subcarrier joint tracking schemes for multiplexed binary offset carrier modulated signals result in poor ranging accuracy, failing to fully utilize the high-frequency BOC components and effective sidelobe spectral line components of the MBOC signal, leading to coherent output signal-to-noise ratio loss and decreased sensitivity of code phase and subcarrier phase.
An unambiguous tracking method based on multi-harmonic components (MBOC) satellite navigation signals is adopted. By acquiring the initial estimate of local carrier parameters and the digital intermediate frequency MBOC signal, a baseband signal is generated. Multiple orthogonal local subcarriers and parameter adjustment values are generated using a local subcarrier numerically controlled oscillator and an incoherent discriminator. The phase estimate is updated by combining the subcarrier phase estimate and code phase estimate from historical moments, and the unambiguous delay estimate is calculated. Finally, the minimum variance criterion is used to calculate the high-precision unambiguous tracking and ranging result.
By fully adapting to the multi-harmonic characteristics of the digital intermediate frequency MBOC signal, the ranging error caused by tracking deviation is reduced, the false locking or ranging jump phenomenon caused by integer ambiguity is eliminated, the accuracy of delay estimation is ensured, and the ranging accuracy is improved.
Smart Images
Figure CN121857004B_ABST