Research Of Jamming Strategy And Jamming Method Against MIMO Radar

As new type radar,MIMO radar has many advantages,such as flexible layout,strong anti-intercept capability,strong anti-jamming capability,weak target detection and anti-stealth.It will play an important role in the future battlefield.Research on MIMO radar at home and abroad continues to deepen,due to the many advantages of MIMO radar.The research on jamming strategy and jamming method of MIMO radar is becoming more and more important.Firstly,the MIMO radar's system structure,the transmitted signal waveforms and signal processing flow are analyzed.Features of MIMO radar are concluded,and feasibility of MIMO Radar jamming is analyzed.Then the radar jamming patterns and the characteristics of different MIMO radars are analyzed to study the strategy for MIMO radar.The MIMO radar jamming methods with pulse compression gain is studied.Theoretical analysis and simulation verify the effectiveness of each jamming method.The main research content of this thesis are as follows:1.The structure and system classification of MIMO radar is studied.Several orthogonal signal waveforms are briefly analyzed.The MIMO radar signal processing flow and key technologies are analyzed in detail,laying the foundation for the subsequent theoretical analysis and computer simulation.Finally,features of MIMO radar are concluded by comparing with traditional radar,and feasibility of MIMO Radar jamming is analyzed.2.Combining the preconditions and the constituent elements of the jamming strategy,the radar jamming pattern classification summary is firstly performed,and then the jamming pattern of different systems MIMO radar is analyzed.The jamming strategy for MIMO radar is studied,based on the analysis of the enemy MIMO radar working mode and own jamming capacity.3.The influence of frequency shift processing on the signal processing results of MIMO radar is studied,including the influence of the relative amount of frequency shift,sub-signal FM bandwidth and frequency interval between sub-signals.The theoretical derivation and simulation analysis lead to conclusion,the shifted frequency should be less than half of the sub-signal FM bandwidth.4.The MIMO radar jamming methods with pulse compression gain are studied.Including noise convolution joint frequency shift jamming,dense false target joint frequency shift jamming,extracting and repeating jamming and pulse sampling and repeating jamming.The generation mechanism,mathematical model,the effect and limitation conditions of these jamming methods are analyzed.On the basis of building a MIMO radar simulation platform,the availability of each deception jamming method is demonstrated by simulation results.