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作 者:乔琳 李春艳 罗豆 李渭龙[2] 李庚鹏 汤琦 QIAO Lin;LI Chunyan;LUO Dou;LI Weilong;LI Gengpeng;TANG Qi(School of Electronics Engineering,Xi′an University of Posts&Telecommunications,Xi′an 710121,China;Institute of Photonics and Photon-technology,Northwest University,Xi′an 710127,China)
机构地区:[1]西安邮电大学电子工程学院,西安710121 [2]西北大学光子学与光子技术研究所,西安710127
出 处:《光子学报》2022年第10期183-194,共12页Acta Photonica Sinica
基 金:国家自然科学基金(No.61805199);陕西省自然科学基金(No.2022JM‒387);陕西省教育厅专项科研计划(No.20JK0908)。
摘 要:针对特定环境下实现目标定位的应用需求,对基于偏振紫外光单次散射的非视距目标定位系统性能进行了研究。首先利用矩阵光学的方法推导了系统接收光强与方位角及定位距离之间的关系。其次建立了基于偏振紫外光传输的大气湍流模型,利用MATLAB对模型中的各量进行了仿真。研究结果表明:定位距离、湍流强度以及收发仰角增大都会导致系统性能下降,若要求系统中断概率低于10^(-2),则定位系统在弱湍流和强湍流环境中的定位范围应分别在1~200 m和600 m内。此外收发仰角越小系统性能越好,因此为达到非视距定位的目的可将系统收发仰角都设为25°。Ultraviolet(UV)communication technology realizes signal transmission based on light scattering,which has strong anti-interference,good security performance,omnidirectional transceiver,obstacle crossing and other technical advantages.During radio silence,local secure communication or complex electromagnetic environment,UV communication can be used as a special local military secure communication means,or as a supplement to other communication means under certain conditions.It has special use value and practical significance for future war and modern national defense.In recent years,with the development of UV communication technology,Non-line-of-sight(NLOS)target location technology based on UV scattering transmission has become a hot research topic.At present,the method of network multi-point coordinate mutual calculation is often used to determine the target distance and azimuth information.This paper starts from the requirement for fast and flexible completing hardware deployment in complex combat environment.When using optical signal transmission,its polarization characteristics contain the angle information carried by unique vibration direction,and can keep this characteristic in the long distance straight line propagation.A polarization UV light NLOS target location technology is proposed,which can realize the localization of two NLOS targets.And aiming at the application requirements of target localization in specific environments,the performance of non-line-of-sight target positioning system based on single scattering of polarized ultraviolet light is studied.Firstly,the relationship between the system received light intensity and azimuth angle and positioning distance is derived by the method of matrix optics.Secondly,the effects of system outage probability and transmitter and receiver elevation angle on outage probability in different atmospheric turbulence are analyzed by establishing atmospheric turbulence model based on polarized UV light.Thus,the influence of the geometric parameters of the receiver
关 键 词:偏振紫外光 光通信 单次散射 非视距 测距定位 大气湍流
分 类 号:TN23[电子电信—物理电子学]
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