| With the development of science and technology,the electromagnetic environment is becoming more and more complex,which brings a lot of challenges to the radar signal detection and continuous tracking.Compared with phased array radar,MIMO radar has stronger anti-jamming ability and higher resolution,which has become an important research direction.In this paper,based on the moving platform MIMO radar,the subarray level surface array signal model is established,the signal processing of MIMO radar is systematically modeled and simulated,and the recognition algorithm of true and false targets in the presence of towed decoys is studied.The main contents are as follows:1.Aiming at the moving platform MIMO radar,the receiving and transmitting signal model of the subarray level array is established,and the pattern between and within the subarray of the MIMO radar is simulated and analyzed,and the coverage range of the MIMO radar signal is determined.2.Based on the characteristics of MIMO radar and the real-time dynamics of platform / target,the echo signal model of moving platform MIMO radar is established,including point target signal,clutter signal and many undesirable factors.A coordinate transformation method based on rotation matrix is proposed to avoid matrix inversion,which improves the calculation accuracy of inverse matrix and reduces the calculation amount of the algorithm.The correlation characteristics of clutter Doppler range spectrum are analyzed by simulation,which lays a foundation for the research of clutter suppression algorithm.3.The non adaptive processing of MIMO radar echo signal,the adaptive processing algorithm in clutter environment and the tracking algorithm of moving platform are studied.Aiming at the problem of too much computation of all space-time STAP,the reduced dimension STAP algorithm is used to realize the modeling and full process simulation of the moving platform MIMO radar subarray signal processing system.4.Aiming at the scene with towed decoys,the recognition algorithm based on the relationship between target and decoys is proposed,and the recognition algorithm based on the difference between the transmitting angle and receiving angle of the measured signal of MIMO radar is proposed.The influence factors and boundary conditions of the two algorithms are simulated and analyzed.In this paper,the flow of towed decoy identification processing combined with the above two algorithms is proposed,and the application of the algorithm in the integrated simulation system is realized. |
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