Research On Navigation Anti-jamming Technology Based On Array Optimization

In modern complex electronic confrontation environment,electronic interference is the main method to combat radio systems,the implementation of electronic confrontation is to prevent the enemy to use its information links on the battlefield freely,such as:the transmission path between the target and the radar,wireless link between the two communication units,the transmission path between the navigation device and the aircraft.Therefore,the research of wireless anti-jamming technology is the key to improve the performance of radio electronic equipment.In this paper,the background of our research is about navigation anti-jamming,we mainly focus on the navigation anti-jamming technology which is based on adaptive array structure optimization,the main contents are summarized as follows:The problem of spatial adjacent interference suppression in anti-jamming technology which is based on linear array is studied.We adopt the spatial correlation coefficient evaluation and research the interference suppression technique which is based on linear array steering configuration and array sparse structure optimization,when the navigation signal and interference signal is correlated in time domain and adjacent in airspace,this strategy improve the ability to detect and capture the navigation signal whenSINR_outis low,thereby,this method finally enhance the anti-jamming capability of satellite navigation system.Aim at the problem of spatial adjacent interference suppression in anti-jamming technology which is based on planar arrays,a direction-guided adaptive interference suppression method is proposed.With the redundant array sparse thought,when navigation signal and interference signal are under adjacent constraints,we adopt a regular beamforming method which is based on sparse structure optimization to improve the ability to detect and capture the navigation signal.The anti-jamming performance is verified by simulation.Based on the expectation of optimal output error ratio,an adaptive zero-interference suppression technique is proposed to solve the problem that combat the strong interference in random airspace effectively.FPGA implementation program is designed,and we completed the anti-jamming algorithm simulation verification.