Study On Cooperative Jamming Techniques Against Radar Network

Radar network is a typical multisensor system.Radar network,which consists of multiple radars appropriately deployed in difference systems,different frequencies,and different work patterns,can allocate the resources by the fusion center according to the mission requirement.As a result,the radar network forms an omnibearing,tridimensional,and multi-layered combat system in the field.And the fighting capability of the radar network will be improved greatly and overall.The radar network system has developed widely in various aspects of electronic counter-countermeasures applications,which poses a great threat to the electronic jamming,anti-radiation missile,stealth airplane,and low altitude attack.How to deceive a radar network has been an urgent problem in the field of electronic countermeasures.The key cooperative jamming techniques against radar network are mainly researched in this thesis.And the major work and contributions are as follows:1.Because the pulse compression radar generally employs various thechniques of electronic counter-countermeasures,several effective jamming methods agianst the pulse compression radar are proposed.Firstly,as the traditional frequency-shifting jamming and pulse partition repeater jamming are no longer effective in against frequency-agile radar,a new pulse partition convolution repeater jamming is proposed.The simulation results show that it has a good jamming effect.Secondly,according to the design principle of the order-statistic(OS)constant false alarm rate(CFAR)detection,a multiple false targets generation method specifically for pulse-compression radar based on OS-CFAR is proposed.Meanwhile,the steps for setting the jammers' parameters are derived.Finally,as the radar uses the two anti-interference technologies of frequency modulation rate agility and OS-CFAR,a multi-carrier and blind shift-frequency shifting jamming is proposed.2.The jamming against radar with a single jammer has a significantly disadvantage,therefore,several cooperative jamming methods are proposed.The radar network can be deceived effectively,by appropriately deploying the number?patterns and powers of the jammers.Firstly,the common classification of the cooperative jamming is introduced and analyzed.Then,the jamming against pulse compression radar with a single jammer has a significantly disadvantage,when there is a radar uncertain position.Therefore,two cooperative jamming methods specifically for the pulse compression radar with constant false alarm ratio detector are proposed.The obtained conclusion provides guidance for the practical application of cooperative jamming against pulse compression radar.Finally,aiming at the problem of suppression effect of cooperative jamming against the radar network,mathematical models of radar network's detection probability is derived.The suppression effects under different situations are simulated and analyzed quantificationally.3.Because the different radar networks generally employ various thechniques of electronic counter-countermeasures,several effective phantom tracks generation methods agianst the two radar networks are proposed.And a deviation compensation for the phantom radar tracks is presented.Firstly,depending on the different fusion architectures of the network,the two data processing methods of the centralized and distributed radar network are analyzed deeply.Then,aiming at the problem of same-source-testing recognition for phantom track jamming used by centralized radar network,the effect of the inaccuracies of radar position and ECAVs position to the phantom track is considered mainly.Meanwhile,a deviation compensation for phantom radar tracks is presented in two-dimensional(2-D)space.Finally,aiming at the problem of track association testing for phantom track jamming used by distributed radar network,two kinds of phantom tracks are proposed in three-dimensional(3-D)space.And the deviation compensation is extended to(3-D).4.In order to improve the jamming effect on the radar network,the research on the optimization assignment for cooperative jamming resources against radar network is carried out.Firstly,according to the detection process of the radar network,the suppression probability performance index during the target penetration is built.Meanwhile,the effect factors of different jamming modes on radar jamming performance indexes are considered from four aspects,such as time domain,frequency domain,space and processing domain.Then,an objective function for allocating radar jamming resources is built,which is based on the calculation of the dynamic suppression probability formula.The radar jamming resource allocation model includes two submodels: the jamming objects and the jamming modes.Finally,the improved genetic algorithm and improved cuckoo search algorithm are applied to solve the radar jamming resource allocation model.The efficiency of the two swarm intelligence algorithms is verified by multiaspect,such as global optimization performance,convergence rate and convergence quality.