Electromagnetic Interference Response Analysis Method For Tactical Data Link

In the future network-centric warfare(NCW),the tactical data link will play an increasingly important role in improving the overall combat effectiveness of the troops.It has become a practical and urgent problem that how to ensure the effective operation of the tactical data link in the complex electromagnetic battlefield environment,especially to transmit the tactical information accurately,real-time and effectively under the circumstance of enemy jamming,so as to improve the operational effectiveness of various weapon platforms.The effective performance of tactical data link after interference is the key to its survival in the future battlefield environment.Therefore,the research on the performance effect of tactical data link system after interference has important theoretical value and practical significance.With the development of cognitive radio protection technology,especially the construction of prior knowledge base based on interference model,it provides a new idea and method to improve the anti-interference performance of tactical data link system.For tactical data link is different electromagnetic interference and the response of the situation,this article first has carried on the related research,literature search and analysis on the development of tactical data link,working mode and working principle are analyzed,and study the kinds of electromagnetic interference model,mathematical model,master the related concepts of cognitive radio,to interfere with the present situation,the trend of the development,difficulties and so on were studied.Based on the actual work,the Link11 tactical data link was selected as the research object.On the basis of in-depth study of the communication system of Link11 tactical data link system,especially the analysis of the signal processing process of the physical layer of the data terminal machine,the simulation framework of different interference response of Link11 tactical data link was established,and the mathematical model of the main modules was obtained.The effects of noise FM,LFM,noise,sweep and convolution modulation on the system under different SNR are analyzed by simulation.The problem of steady state velocity under different interference conditions is discussed,and the influence of various interferences on the system is simulated and analyzed.Finally,from the system bit error rate,carrier synchronization performance,timing synchronization Angle analysis summarizes the related parameters,such as different types of electromagnetic interference signal of Link11 tactical data link system effectiveness,in order to establish the cognitive model a priori knowledge base,in order to meet with interference interference patterns quickly,and then adopt corresponding measures to provide the reference.