摘要
采用修正的伽马分布,结合米氏散射理论,分析了水云粒子的光散射特性,建立了4种常见水云粒子含水量与消光系数的关系。对于光量子的偏振态,研究了水云粒子背景下量子干涉雷达(QIR)探测光子的偏振变化规律,建立了水云粒子影响QIR探测光子的传输距离、分辨率、误码率以及生存性能的数学模型。理论分析和实验仿真结果表明:随着水云中含水量的增加,消光系数呈线性增加,导致衰减系数增加,从而使得探测光子的能量耗散量增大,探测光子的传输距离下降;当发射光子数目一定时,QIR的分辨率随水云粒子光学厚度的增加而降低;当水云粒子浓度一定时,随着退偏比的增大,系统的误码率呈减小趋势;当目标的可探测点数一定时,水云对QIR系统的干扰强度越大,雷达的生存性能越低。由此可见,在QIR的设计、调试和使用过程中,需根据水云的相关参数,自适应地调整QIR系统的各个指标参数,从而提升系统的探测性能。
The modified Gamma distribution and Mie scattering theory were used to examine the light scattering attributes of water cloud particles to investigate the effect of water cloud on quantum interferometric radar(QIR)performance parameters,and a relationship was developed between water content and extinction coefficient of four common water cloud particles.For the polarization state of light quantum,the polarization change law of QIR detected photon under the background of water cloud particles is researched,and the mathematical model of the effect of water cloud particles on the transmission distance,resolution,bit error rate,and the survival performance of QIR detected photon is established.The theoretical analysis and experimental simulation results show that the extinction coefficient linearly increases with the increase of water content in the water cloud,causing the increase of attenuation coefficient,thus increasing the energy dissipation of the detected photon and decreasing the transmission distance of the detected photon.When the number of emitted photons remains constant,the resolution of QIR decreases with the increase in the optical thickness of water cloud particles.When the concentration of water cloud particles remains constant,the bit error rate of the system decreases with the increase of the depolarization ratio.When the number of detectable points of the target is constant,the greater the interference intensity of the water cloud to the QIR system is,the lower the survival performance of the radar is.To improve the detection performance of the system,each index parameter of the QIR system should be adjusted adaptively according to the relevant parameters of the water cloud in the design,debugging,and use of QIR.
作者
聂敏
王瑾
杨光
张美玲
孙爱晶
裴昌幸
Nie Min;Wang Jin;Yang Guang;Zhang Meiling;Sun Aijing;Pei Changxing(School of Communication and Information Engineering,Xi’an University of Post and Telecommunications,Xi’an,Shannxi 710121,China;State Key Laboratory of Integrated Service Networks,Xidian University,Xi’an,Shannxi 710071,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2022年第5期64-72,共9页
Laser & Optoelectronics Progress
基金
国家自然科学基金(61971348,61201194)
陕西省国际科技合作与交流计划(2015KW-013)
陕西省教育厅科研计划(16JK1711)
陕西省自然科学基础研究计划资助项目(2021JM-464)。
关键词
大气光学
对流层水云
量子干涉雷达
分辨率
传输距离
雷达生存性能
atmospheric optics
tropospheric water cloud
quantum interferometric radar
resolution
transmission distance
radar survivability
