Research On Integrated Anti-jamming Technology And System Performance Evaluation Method Of Digital Array Radar

With the highly integrated and intelligent trend of modern electronic warfare equipment,the highly intensive,diverse and targeted electronic interference generated in the omnidirectional,full-frequency and full-time domain significantly affects the detection performance of air defense surveillance radar.The anti-jamming technology will directly affect the performance of radar in the battlefield environment,and the performance of radar will directly affect the survivability of radar in the battlefield environment.Therefore,based on the previous research,combined with the current scientific research,this dissertation focuses on the following aspects:1.Based on the modern anti-main lobe interference algorithm,the beam domain feature projection algorithm is proposed.This algorithm harnesses multi-beamforming and linear transformation to transform the signal space to be processed from sub-array domain to beam domain,reduces the dimension of projection matrix and interference noise covariance matrix,and greatly reduces the computation of adaptive weight.This algorithm breaks through the computational bottleneck of traditional feature projection algorithm,and improves the anti-interference performance compared with traditional feature projection algorithm,which has good practical value and research value.In this dissertation,the principle of the algorithm is described systematically,and the effectiveness and superiority of the algorithm are verified by computer simulation.2.Based on various performance and efficiency analysis of radar antijamming algorithm,this dissertation proposes the innovated integrated antijamming architecture from the system architecture level,which can flexibly switch its strategy by sensing the change in the surrounding,improve the working efficiency of system under the complicated electromagnetic environment,have good practical value,analyze the principle of the architecture and computational complexity from the point of theoretical and engineering implementation,and finally verify the function of the new architecture by computer simulation and performance.3.In order to simulate the scene of red-blue confrontation on the battlefield and evaluate the anti-jamming effectiveness,this paper proposes and develops the anti-jamming effectiveness evaluation platform of digital array radar,which avoids the security,efficiency and economic problems brought by the physical simulation.The digital system: a.harnesses the CPU-GPU hybrid architecture to parallelize the array signal processing of array radar by multi-threading of GPU,which greatly improves the efficiency of calculation;b.achieves the real-time dynamic simulation effect by improving the working mode of threads;c.simulates the actual red-blue confrontation scenes,whose tactical settings can be programmed;d.improves its computational efficiency,solves some computational bottlenecks of traditional algorithm,and further improves the real-time performance of the software.This system provides a good platform for the verification of anti-interference algorithm,which can simulate and evaluate various indicators,and improve the verification efficiency of the new algorithm.In this dissertation,with scientific research practice,based on theoretical elaboration,combined with computer simulation analysis,the practical problems encountered in the anti-jamming of digital array radar are solved,and the anti-jamming effectiveness is improved,which plays an important role in improving the combat effectiveness of radar system.