基于空间分集的太赫兹光子计数系统  

Terahertz photon-counting systems based on spatial diversity

作　　者：辜开丽 周小林[1,2] 钟梓滢 屠艳菊[1] 杜建洪[1,2] 

机构地区：[1]复旦大学电磁波信息科学教育部重点实验室 [2]上海200433 [2]复旦大学信息科学与工程学院通信科学与工程系,上海200433

出　　处：《太赫兹科学与电子信息学报》2015年第5期700-706,共7页Journal of Terahertz Science and Electronic Information Technology

基　　金：国家科技重大专项资助项目(No.2012ZX03001013-004);中国科学院太赫兹固态技术重点实验室开放课题资助项目

摘　　要：由大气湍流引起的闪烁效应是影响太赫兹无线通信系统性能的重要因素,为此提出了使用空间分集技术来改善受强大气湍流和噪声影响的太赫兹光子计数无线通信系统性能的方案,并分别推导了在开关键控(OOK)调制下基于Laguerre模型采用发射分集、接收分集以及多输入多输出技术(MIMO)的系统在强大气湍流下的误码率表达式。数值分析结果表明,在自由空间使用分集技术可以有效对抗强大气湍流,降低通信系统的误码率,是一种在不利天气条件下提升太赫兹无线通信性能的简单而有效的方法。Scintillation induced by atmospheric turbulence is an important factor affecting the performance of terahertz wireless communication system. A space diversity scheme is proposed to improve the performance of terahertz photon-counting wireless communication system which is influenced by strong atmospheric turbulence and noise. The Bit Error Rate(BER) expression of transmit diversity system, receive diversity system and Multiple-Input Multiple-Output(MIMO) system in strong turbulence channel are respectively derived. The numerical simulation results show that spatial diversity techniques which can be used to antagonize strong atmospheric turbulence effectively and reduce the BER of the communication system, is a simple and effective approach to improve terahertz wireless communication under adverse weather conditions.

关 键 词：太赫兹 大气湍流 空间分集 光子计数 Laguerre分布 

分 类 号：TN92[电子电信—通信与信息系统]