| The sensitivity of modern radar sensor is limited by the standard quantum limit.However,with the wide application of stealth technology,it is becoming more and more difficult to detect targets.In order to break this bottleneck,a new concept of quantum radar is proposed,which is expected to use quantum entanglement technology and quantum information processing technology to enhance radar detection ability,improve resolution and so on.Furthermore,as an important parameter of radar detection ability,radar target characteristics have important research significance.However,the research of quantum radar scattering cross section(Quantum Radar Cross Section,QRCS)is just in the beginning.How to obtain the target information from the echo photon state is a challenge,which will be helpful to detect the target and identify.In this paper,the analysis of QRCS is discussed and mainly described in the following aspects.First,the analytical expression of the quantum radar cross section which applies to the two-dimensional typical target is deduced.By comparing the analytical solution with the simulation results,the correctness of the simulation formula and program is verified,and the results of the quantum radar cross section in the case of monostatic radar,bistatic radar and multiple photons emission are analyzed.Second,the calculation method of three-dimensional target QRCS is proposed,and the simulation formula is rewritten so that it can analyze the QRCS of any structure for the first time.The calculation results of the sphere with the method proposed in this paper is used to compare with those of the analytical solution to verify the correctness of the calculation method and program.Finally,for the first time,MPI parallel and CUDA based GPU acceleration technology is introduced into QRCS simulation,which can effectively analyze the QRCS of large-scale model.Through the comparison of serial and parallel results of sphere,the correctness of parallel method is proved.In the same time,the simulation of typical target and electrically large complex three-dimensional target is carried out.Compared with the results of physical optics method and moment method,the advantages of quantum radar detection can be obtained,the calculation time of different acceleration methods is compared,and a more effective acceleration method is obtained.In this paper,an effective method is proposed to analyze the QRCS of electrically large complex targets.The simulation results verify the correctness and generality of the method,which can greatly shorten the simulation time and have high efficiency.In the continuous optimization of QRCS calculation,this method will be more helpful for the practice use and provides a kind of prediction and reference for the study of the quantum radar scattering target characteristics. |
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