Research On Anti-jamming Technology In MIMO Communication Of Space-time Slow Frequency-hopping

Along with the rapid development of science and technology in today's world,informationalized and joint combat will become the necessary form of war in the future.However,in the wartime communication,the electromagnetic environment is complex,and the electromagnetic interference is changing rapidly,which seriously affects the reliability of the military communication system.Frequency hopping(FH)communication technology has become the most effective anti-jamming means of military communications with its outstanding anti-jamming capability and good concealment.However,with the popularity of wireless communication and military escalation,the traditional frequency hopping anti-jamming theory is limited,we need to continue to develop more efficient intelligent military communications anti-jamming technology.Multiple input multiple output(MIMO)technology can greatly improve the channel capacity and link reliability,thereby suppressing channel fading and enhancing the system anti-jamming capability.In view of the above application and the research background,this paper proposes a research direction of anti-interference technology in MIMO communication of space-time slow frequency-hopping,establish a new Space-Time and Slow Frequency-Hopping with Multiple Input Multiple Output(STFH-MIMO)communication system model,the system is based on the proposed Space-Time Slow Frequency-Hopping(STFH)algorithm and Orthogonal Coherent Filtering(OCF)algorithm,and realize joint information transmission of multi-domain in spatial domain,time domain and frequency domain,at the same time also win the space-time-frequency diversity multiplexing gain and frequency-hopping gain,it has not only realized information transmission of high speed and large capacity,but also has significant anti-interference ability.To preliminary simulation system can verify that compared with the conventional Space-Time Block Code(STBC)system and single send single receive frequency-hopping system,the STFH-MIMO system has significant advantages in anti-interference ability.In order to analyze the anti-jamming performance of STFH-MIMO communication system more specifically,this article selects the STFH-MIMO communication system with the antenna size of two send one receive and eight send eight receive,selects three kinds typical communication interference which is broadband interference,partial band interference and tracking interference respectively to join channel of system to implement interference,through simulating to obtain SJR-BER curve under the three typical interference,compares with the conventional STBC system and the traditional frequency-hopping system,makes detailed analysis for the anti-jamming performance and advantages of the system,the results of the analysis proved the superiority of anti-interference of STFH-MIMO system.The research of anti-jamming technology in MIMO communication of space-time slow frequency-hopping in this paper provides a new way of thinking for anti-interference theory research and realizes the preliminary simulation,expect to play the role of reference and guidance for the anti-jamming theory research of the future wartime communication.