无线光相干通信及其实验研究  

Wireless optical coherent communication and its experimental research

作　　者：高晓梅[1] 邢甜 高婉倩 董可 柯熙政[2] GAO Xiaomei;XING Tian;GAO Wanqian;DONG Ke;KE Xizheng(School of Artificial Intelligence,Xi'an Aeronautical Polytechnic Institute,Xi'an 710089,China;School of Automation and Information Engineering,Xi'an University of Technology,Xi'an 710048,China)

机构地区：[1]西安航空职业技术学院人工智能学院,西安710089 [2]西安理工大学自动化与信息工程学院,西安710048

出　　处：《光通信技术》2022年第4期37-45,共9页Optical Communication Technology

基　　金：西安市科技创新引导项目(NO.201805030YD8CG14(12))资助;陕西省重点产业创新项目(2017ZDCXL-GY-06-01)资助;陕西省教育厅科研计划项目(NO.18JK0341)资助。

摘　　要：与直接探测相比,相干探测具有响应速度快、检测灵敏度高和滤波性能好等优点,是提高无线光通信系统接收灵敏度的关键技术。总结了国内外在无线光通信系统相干探测领域的研究进展,同时介绍了西安理工大学在相干探测技术方面的研究工作,主要包括与无线光相干通信有关的大气湍流抑制、到达角起伏、振幅起伏、信道噪声、光信号偏振、本振光功率和光源线宽等因素对相干探测系统性能的影响以及副载波调制非光域外差探测系统在理想信道和非理想信道的性能分析。最后,对无线光相干通信系统的发展方向进行了展望。Coherent detection has the advantages of fast response,high detection sensitivity,and good filtering performance,compared with direct detection.It is a key to improve the receiving sensitivity of optical wireless communication system.This paper summarizes the research progress in the field of coherent detection of optical wireless communication system,and introduces the research work of Xi'an University of Technology in the field of coherent detection technology,including the influences on the performance of wireless optical communication due to atmospheric turbulence suppression,angle of arrival fluctuations,amplitude fluctuations,channel noise,optical signal polarization,local oscillator optical power and light source linewidth,and the performance analysis of subcarrier modulated non-optical heterodyne detection system in ideal and non-ideal channels.Finally,the development direction of wireless optical coherent communication technology is prospected.

关 键 词：无线光通信 相干探测 大气湍流 检测灵敏度 相干增益 

分 类 号：TN929.1[电子电信—通信与信息系统]