Complex Electromagnetic Environment Learning Based Self-organized Wireless Communication Link Establishment And Intelligent Anti-jamming Techniques And System Implementation

With the development of wireless communication technology,the wireless spectrum in electronic warfare is becoming increasingly complex,and communication systems are facing the problem of being disrupted by malicious users at any time.The sensing technology of complex electromagnetic spectrum environment and intelligent anti-jamming communication technology have become a solution to this problem.This article focuses on in-depth analysis and research on broadband spectrum sensing techniques,self-organized wireless communication link establishment techniques,and intelligent anti-jamming techniques.This article develops a self-organized communication link establishment and intelligent anti-jamming demonstration platform through software radio experimental equipment,to evaluate the feasibility and advanced nature of the algorithm.The details are as followsFirstly,the problem of spectrum sensing and communication link establishment in a complex electromagnetic environment is studied,and a self-organized communication link building method based on receiver matching identification is proposed.In a complex electromagnetic environment,the communication caller and responder use the full frequency spectrum scan to match the operating frequency of the other party,and distinguish the legitimate user signal and the interference signal by verifying the content of the data packet.After simulating the spectrum sensing algorithm,the results show that the spectrum sensing algorithm of full frequency scanning has obvious advantages over the spectrum sensing algorithm of step scanningSecondly,an intelligent anti-jamming algorithm for negotiation and jamming avoidance is proposed.After the communication caller and responder complete the two-way link establishment,the communication parties will detect the transmission channel in each communication transmission,to analyze whether the channel currently used has been attacked by interference and whether the communication parties need to update the frequency.In the process of detecting interference signals,this paper proposes two different recognition algorithms for different types of jamming,making the designed intelligent anti-jamming communication algorithm more widely applicable.When the communication system finds the jamming signal,it will trigger the system's anti-jamming mechanism,re-establish the communication link through frequency point consistency negotiation,and then resume normal communication transmission.On this basis,in order to eliminate the impact of short-term jamming pulses on the stability of the communication system,a timeout detection mechanism is added on the basis of the existing jamming avoidance algorithm to improve the stability of the system.Finally,in order to visually demonstrate the effect of the algorithm in the actual electromagnetic environment and optimize system performance,this article will eventually develop a self-organized communication link establishment and intelligent anti-jamming demonstration platform for complex electromagnetic environments through software radio hardware equipment USRP and software development environment Lab VIEW.The platform mainly implements system functions such as deep perception of complex electromagnetic environment,self-organized communication link establishment and intelligent anti-jamming communication.By using a visual interface,it can show the evolution of the state of the complex electromagnetic environment that is "invisible and intangible",and can evaluate the proposed feasibility and effectiveness of anti-jamming self-organized communication algorithm.By demonstrating the operation and data analysis of the verification platform,the results show that the communication initiator and responder's two-way link building time averages 18.2 seconds,the spectrum sensing time averages 80 milliseconds,and the unidirectional link building time averages 15.8 seconds.The functions of wireless communication link building and intelligent anti-interference prove the feasibility and effectiveness of the proposed self-organizing wireless communication link building and intelligent anti-interference algorithm.