Satellite navigation polarization anti-interference method and device

By using ground navigation receivers, numerically controlled amplitude modulators, and numerically controlled phase modulators in satellite navigation systems, and combining Ustiffe manifold constraints to optimize polarization weights, the problem of antenna array performance degradation caused by multi-polarization interference was solved, and a highly efficient anti-interference effect was achieved in satellite navigation systems.

CN119758383BActive Publication Date: 2025-10-28NAT UNIV OF DEFENSE TECH
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Patent Information

Application Number
CN202510103015.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-01-22
Publication Date
2025-10-28
Estimated Expiration
2045-01-22

AI Technical Summary

Technical Problem

Multipolar interference can drastically degrade the anti-interference performance of satellite navigation antenna arrays. Existing technologies lack effective methods for suppressing multipolar interference, leading to a decrease in interference suppression performance and additional consumption of array degrees of freedom.

Method used

By combining a ground navigation receiver, a numerically controlled amplitude modulator, and a numerically controlled phase modulator, the polarization response vector of the antenna is obtained. The gain norm and polarization equalization difference norm of the antenna array are calculated. A multi-polarization interference suppression performance optimization function is constructed and solved using Ustiffe-like manifold constraints. The polarization weights are adjusted to optimize the polarization characteristics and achieve anti-interference.

Benefits of technology

It significantly improves the multi-polarization interference suppression performance of satellite navigation antenna arrays, enhances the anti-interference capability of satellite navigation systems, and provides a theoretical basis for quantitative analysis.

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Abstract

The present invention provides a satellite navigation polarization anti-interference method and device, wherein the method includes: obtaining the vertical polarization response vector and the horizontal polarization response vector of the first orthogonal feeding point and the second orthogonal feeding point, calculating the antenna array gain norm and the antenna array polarization balance difference norm, constructing a multi-polarization interference suppression performance optimization function, and solving it based on the unitary Stiefel manifold constraint to obtain the analog domain polarization weight vector, and inputting it into the corresponding digital controlled amplitude modulator and digital controlled phase modulator for adjustment to obtain the positioning information after interference suppression. The beneficial effect of the present invention: significantly improving the multi-polarization interference suppression, laying a theoretical foundation for the quantitative analysis and performance improvement of the multi-polarization interference suppression of satellite navigation antenna arrays. It not only provides a new perspective for the field of satellite navigation polarization countermeasures, but also provides an effective solution for improving the polarization anti-interference capability of GNSS systems.
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