Research On Link16and Anti-Jamming Technology

With the great development of modern military, tactical data link is used more andmore widely. And more and more attentions have been paid to the information war bythe countries all over the world. At present, The United States in the development ofData Link has a leading position in the world, Especially the JTIDS, JTIDS is acoordinated system of communicatioin, navigation, command identification. JTIDS usesTime Division Multiple Access architecture and it is a high capacity, high rate,ECM-resistant, security tactical information distribution ststem in which there are manyanti-jamming measures to include Reed Solomon encoding, tamed spread spectrum,direct spread-spectrum, MSK modulation and demodulation, frequency hopped) andtime hopped. security features such as communication system. Land, sea and air forcesin various combat platforms are combined effectively on the actual battlefield andattacking the enemy most violently as a whole.In this paper, JTIDS system was first analyzed, and discussed the JTIDS systemfeatures, working principle, message type and packaging methods.Several, some keytechnologies of JTIDS are modeled and simulated by Matlab and Simulink toolbox (RScoding, interleaving, the CCSK soft spread spectrum, MSK modulation, fast frequencyhopping and hopping), analyze their BER performance, and analyze the JTIDS systemanti-jamming performance. Then discussed how to implement effective interferencesignal of the JTIDS system. methods of interference the JTIDS system and some factorsof affecting the interference effect are analyzed.Secondly discussed how to interfere thesynchronization of the JTIDS system, and listed several methods of interferencecommonly(Block-type interference, Repeater interference, Deception interference),demonstrated the feasibility of whether they can cause some interference on the JTIDSsystem. Then using several FM interference signals makes the block jamming for theJTIDS system and simulates the JTIDS’s anti-jamming capability.Finally propose somesuggestions for againsting the JTIDS.