降雨对量子干涉雷达探测性能的影响  

Effect of Rainfall on the Detection Performance of Quantum Interference Radar

作　　者：赵宇婕 张秀再[1,2] 张薇薇 ZHAO Yu-jie;ZHANG Xiu-zai;ZHANG Wei-wei(Jiangsu Province Atmospheric Environment and Equipment Technology Collaborative Innovation Center,Nanjing University of Information Science&Technology,Nanjing,210044,China;School of Electronics and Information,Nanjing University of Information Science&Technology,Nanjing,210044,China)

机构地区：[1]南京信息工程大学江苏省大气环境与装备技术协同创新中心,江苏南京210044 [2]南京信息工程大学电子与信息工程学院,江苏南京210044

出　　处：《量子光学学报》2024年第2期92-100,共9页Journal of Quantum Optics

基　　金：国家自然科学青年基金项目(11504176,61601230)。

摘　　要：降雨是影响光子探测的重要因素之一。为了研究降雨对量子干涉雷达探测性能的影响,首先分析探测光子的偏振特性。在Mie散射基础上,分析了不同大小雨滴粒子的光散射特性;根据不同的降雨大小,对降雨强度、传输距离与量子链路衰减的关系进行分析;针对不同光子数,建立了降雨强度、传输距离与灵敏度、分辨率的关系模型并进行仿真实验。结果表明,当发射端脉冲光子数一定时,灵敏度和分辨率随着降雨强度的增加而降低。在同一降雨强度下,分辨率随光子数的增加而增大,但灵敏度随之减小。由此可见,雨滴粒子散射特性造成的影响在量子干涉雷达探测的过程中不可忽略,在实际过程中,应及时根据环境情况调整设备参数,保证其探测性能。Objective Quantum interference radar(QIR)is a promising technology that has been widely developed in modern warfare and civil fields.QIR is information transmission through quantum signals,and quantum signals are greatly disturbed by the transmission environment,so the detection efficiency will also be affected.When detecting photon transmission through the rainfall region,phase delay will occur,resulting in attenuation of quantum signal strength and energy reduction,and thus reducing the accuracy of QIR detection,such as ice crystal particles,tropospheric water clouds,raindrop particles,etc.However,until now,the effect of rainfall on QIR performance has not been studied.Therefore,it is very important to analyze the influence of light scattering characteristics of raindrop particles on QIR detection performance under different rainfall intensity.Methods After linear superposition,raindrop particles of different sizes can still be regarded as spherical particles,similar to equivalent spheres.Firstly,the light scattering characteristics of raindrop particles are analyzed based on Mie scattering theory and Gamma distribution spectrum function.Secondly,according to the scattering characteristics,the energy attenuation of photons passing through the rainfall region is analyzed,and the relationship model between rainfall intensity and link attenuation and transmission distance is established.According to the parity operator detection method,the relationship between rainfall intensity and sensitivity and resolution is studied and analyzed for different pulse photon number and different emission wavelength,and simulation experiments are carried out.Results and Discussions The extinction coefficient increases gradually with the increase of rainfall intensity(Fig.3).Photon energy decreases with the increase of transmission distance,and the greater the rainfall intensity,the more obvious the photon energy attenuation trend(Fig.4).Link attenuation increases with the increase of rainfall intensity and transmission distance(Fi

关 键 词：量子干涉雷达 降雨强度 传输距离 灵敏度 分辨率 

分 类 号：TN929.12[电子电信—通信与信息系统]