崔健,,
廖希,
曾彦志,
张杰
1.重庆邮电大学通信与信息工程学院 重庆 400065
2.移动通信教育部工程研究中心 重庆 400065
3.移动通信技术重庆市重点实验室 重庆 400065
基金项目:国家重点研发计划(2017YFE0118900)，国家自然科学基金(61801062)，重庆市自然科学基金(cstc2019jcyj-msxmX0288)，中国博士后基金(2019M653826XB)
详细信息
作者简介:王洋：男，1986年生，副教授，硕士生导师，研究方向为轨道角动量无线通信、信道建模、智能信息调制表面等
崔健：男，1995年生，硕士生，研究方向为轨道角动量产生与传播
廖希：女，1988年生，讲师，博士，研究方向为电波传播、射频与微波电子学、信道建模等
曾彦志：男，1996年生，硕士生，研究方向为电磁涡旋雷达成像
张杰：男，1967年生，教授，博士，研究方向为涡旋电磁波、毫米波通信、智能环境建模与设计等
通讯作者:崔健 cui1684@foxmail.com
中图分类号:TN929.12计量
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被引次数:0
出版历程
收稿日期:2020-11-06
修回日期:2021-04-04
网络出版日期:2021-04-25
刊出日期:2021-11-23
Research on Optical Wireless Orbital Angular Momentum Multiplexing System Based on Signal Detection
Yang WANG,Jian CUI,,
Xi LIAO,
Yanzhi ZENG,
Jie ZHANG
1. School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
2. Engineering Research Center of Mobile Communications of the Ministry of Education, Chongqing 400065, China
3. Chongqing Key Laboratory of Mobile Communications Technology, Chongqing 400065, China
Funds:The National Key R&D Program of China (2017YFE0118900), The National Natural Science Foundation of China (61801062), The Natural Science Foundation of Chongqing (cstc2019jcyj-msxmX0288), China Postdoctoral Science Foundation (2019M653826XB)
摘要
摘要:基于轨道角动量(OAM)的光无线复用通信技术在理想传输条件下能够大幅度提升通信系统性能，然而现实中大气湍流、孔径失配等因素会造成OAM模态间串扰导致误码率(BER)上升。为了降低光无线OAM复用系统在复杂环境中的误码率，该文首先建立了大气湍流、孔径失配场景下基于垂直分层空时码准则(VBLAST)的OAM复用通信系统(VBLAST-OAM)，之后分析对比基于排序干扰连续消除检测算法(OSIC)、基于马尔科夫随机场置信度传播算法(MRF-BP)、基于OAM串扰特性的排序干扰连续消除算法(OAM-OSIC)应用于上述系统时的性能。结果表明：所提信号检测算法均能有效降低OAM复用系统在复杂环境中的误码率，其中，基于MRF-BP算法的系统性能最好；OAM-OSIC虽然属于次优算法，但在算法的运行开销方面具有较大优势。
关键词:光无线通信/
大气湍流/
轨道角动量/
信号检测/
孔径失配/
误码率
Abstract:The wireless communication technology based on Orbital Angular Momentum (OAM) can greatly improve the performance of the communication system under ideal transmission conditions. However, in the actual environment, atmospheric turbulence and aperture mismatch can cause crosstalk between OAM modes and increase the Bit Error Rate (BER). In order to reduce the BER of the optical wireless OAM multiplexing system in a complex environment, an OAM multiplexing communication system based on the Vertical Bell LAyered Space Time (VBLAST-OAM) code criterion under the scenario of atmospheric turbulence and the aperture mismatch of the transceiver is established firstly. Then, the system performance are analyzed based on the Ordered Successive Interference Cancellation (OSIC), the Markov Random Field Belief Propagation (MRF-BP) algorithm and the algorithm OAM-OSIC. Simulation results show that the algorithm proposed in this paper can reduce the BER of OAM systems effectively in complex environment and the MRF-BP has the best performance. Although OAM-OSIC is a suboptimal algorithm, it has a great advantage in the running cost.
Key words:Optical wireless communication/
Atmospheric turbulence/
Orbital Angular Momentum (OAM)/
Signal detection/
Aperture mismatch/
Bit Error Rate (BER)
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