| In modern warfare,precision guidance technology plays an important role,and seeker radar is one of the important means to improve the precision guidance ability.Due to the strong clutter received by the seeker radar under the action of the radar,the detection of ground,low-altitude and ultra-low altitude targets is severely restricted.In order to improve the detection performance of the seeker radar at this time,it is necessary to carry out multi-dimensional recognition of the working environment.In this paper,the physical mechanism and statistical characteristics of the clutter in the seeker radar are studied.The relationship between the clutter characteristics and the different dimensional parameters of the radar signal is studied.The multi-dimensional clutter modeling is completed and processed with the measured data.The results were compared and verified.The main contents are as follows:The first part: the multi-dimensional model of clutter is established,and the simulation method of the model is studied.Based on this,the multi-dimensional clutter simulation software is designed and developed.Firstly,by analyzing the physical mechanism of clutter,the effects of different dimensional parameters on the clutter characteristics of radar parameters and working scenes are studied.The multi-dimensional parameter modulation model of clutter is established according to the relationship between clutter characteristics and various dimensional parameters.Subsequently,the required parameters and applicable scenarios of different clutter backscattering coefficient models and clutter amplitude statistical models are analyzed respectively,and the detailed simulation methods of each model are given to complete the multi-dimensionality of the down-view clutter of the seeker radar.Modeling.Finally,the development of multi-dimensional modeling and simulation software for missile-borne radar clutter is completed.The second part: Through the processing of the measured clutter data,the clutter characteristics of the measured data in different scenarios are analyzed,and the multi-dimensional clutter model is compared and verified.In order to verify the rationality of the multi-dimensional model of the seeker radar clutter,the measured clutter data of different rubbing angles in the ground and sea scenes are preprocessed respectively,and then the measured clutter correlation,power spectral density and amplitude statistical distribution are measured.Analysis and research on clutter characteristics.Finally,the mean square error test,chi-square test and KS test are used to test the amplitude distribution of the measured clutter and the simulated clutter data respectively,and the comparison of the multi-dimensional clutter model is completed. |
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