| Satellite navigation system can be widely used in the fields of transportation,safety,aerospace and military fields with its high precision positioning,timing technology and allweather,real-time,continuity and passive navigation and positioning.However,the satellite navigation system in the early development did not take into account the system in a complex electronic environment in the work of the problem,resulting in satellite navigation system receiver susceptible to various forms of intentional and unintentional interference.It is of great significance to analyze the application of satellite navigation system in the complex environment and propose the effective and feasible interference suppression method to play the application of satellite navigation system and improve the adaptability of satellite navigation system in various environments.In this paper,aiming to the effect of different types of suppressed interference on the traditional BPSK modulation and the new BOC modulation of the navigation signal,the corresponding interference suppression method is proposed.To the familiar narrowband interference,based on the study of conventional adaptive filtering algorithm LMS,two improved adaptive filtering algorithms in time domain and frequency domain,which improves the anti-jamming ability of the signal is proposed in this paper.Aiming to broadband chirp interference,a segmented interference reconstruction algorithm is proposed in this paper.An interference suppression method based on long integration time is proposed for wideband noise signal interference.The proposed algorithm is above the type of interference and simulation results show the effectiveness of the newmethod.In order to prove the correctness and validity of the proposed method,an experimental verification platform is designed in this paper.Based on the experimental platform,the measured satellite navigation signals are collected and the different types of interference are superimposed.And then use the interference suppression method proposed in this paper to suppress the interference,the feasibility and effectiveness of the proposed method are verified by the improvement of the receiving performance of the same signal system navigation signal before and after the interference suppression. |
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