Research On Reliable Communication Between Unmanned Aerial Vehicles In Complex Electromagnetic Interference Environment

The cooperative operation between the unmanned aerial vehicle and the manned aircraft makes full use of the characteristics of the unmanned aerial vehicle and "complements each other's strengths and complements each other's weaknesses" to maximize the combat effectiveness of the formation.The research shows that the problem of "availability" of data link between aircrafts must be solved.In the strong interference environment,frequency hopping communication technology is generally used to fight against the electromagnetic interference of the enemy,but the traditional frequency hopping technology requires the communication parties to negotiate the frequency hopping spectrum in advance,and the fighters use the pre negotiated frequency hopping pattern for communication.However,in the environment of strong electromagnetic interference,it is difficult for communication parties to exchange frequency hopping parameters,and the "availability" of communication data link cannot be guaranteed.In addition,there are still some unsafe factors such as estimated prediction in the early stage of non-coordinated FH communication.Therefore,this paper proposes the multi-point cooperative anti-jamming technology.When the multi-point frequency hopping network is built,it sends useless signals,increases the difficulty of sorting enemy network stations and judges the existence of real communication nodes.At the same time,in view of the situation of random interference,this paper proposes a variable speed non coordinated frequency hopping technology,which overcomes the tracking interference problem of the enemy and increases the frequency hopping parameters of the enemy On the basis of the difficulty of reconnaissance and tracking,the artificial noise cooperative jamming technology is proposed,which not only does not affect the target node's receiving signal,but also interferes with the enemy's channel quality,and at the same time interferes with the enemy's obtaining other useful information.According to the nature of confrontation between the two sides,the game problem between communication interference and anti-interference is expressed as two person zero sum game,and its quantitative analysis is carried out.The anti-interference performance of the variable-speed non-coordinated frequency hopping communication system is verified by simulation experiments.The analysis shows that our method is correct and effective.