Exploration of Anti-interference Technology for Professional Navigation Instrument Landing System Based on Multi-source Data Fusion

Wu Hao

Civil Aviation Xinjiang Air Traffic Management Bureau, Xinjiang Uygur Autonomous Region

Abstract：

The electromagnetic environment at airports is becoming increasingly complex. Instrument landing systems (ILS) are severely affected by radio frequency interference and multipath effects. Traditional single radio frequency navigation mode has weak anti-interference ability, and existing anti-interference technologies have shortcomings such as high cost and poor fault tolerance. To enhance the adaptability of ILS to complex environments, this paper proposes a multi-source heterogeneous navigation data fusion scheme of ILS/INS/GNSS/DME, constructs a hierarchical fusion framework and designs an adaptive weighted federated Kalman filtering algorithm. Simulation results show that the scheme can reduce navigation and positioning errors by approximately 42.7% without modifying ground equipment, with low modification costs, and can provide safety technical support for civil aviation precision approach.

Key Words：

instrument landing system; multi-source data fusion; federated Kalman filtering; electromagnetic interference; heterogeneous navigation data