基于二维卷积的端到端无线通信系统研究  

Research on End-to-End Wireless Communication System Based on Two-Dimensional Convolution

作　　者：刘乔寿[1] 刘俊杰 蔚淦丞 周雄 LIU Qiao-shou;LIU Jun-jie;YU Gan-cheng;ZHOU Xiong(School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;Advanced Network and Intelligent Connection Technology Key Laboratory of Chongqing Education Commission of China,Chongqing 400065,China;Chongqing Key Laboratory of Ubiquitous Sensing and Networking,Chongqing 400065,China)

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065 [2]先进网络与智能互联技术重庆市高校重点实验室,重庆400065 [3]泛在感知与互联重庆市重点实验室,重庆400065

出　　处：《电子学报》2023年第7期1725-1733,共9页Acta Electronica Sinica

基　　金：重庆市自然科学基金重点项目(No.cstc2020jcyj-zdxm X0024);重庆市研究生科研创新项目(No.CYS21297)。

摘　　要：针对现有端到端自动编译码器无线通信系统在多径信道中表现不佳的问题,本文提出了一种改进的自动编译码器端到端无线通信系统.在设计中,通过改变卷积核的尺寸,利用二维卷积来对抗多径效应引起的频率选择性衰落,并将传统OFDM(Orthogonal Frequency Division Multiplexing)模块同自动编译码器相结合,以此来增加系统应对多径信道的能力.同时,通过仿真分析一维卷积自动编译码器无线通信系统、传统OFDM无线通信系统以及本文改进的自动编译码器无线通信系统在多径信道下的性能.结果表明,在5径瑞利信道下并且以误块率(Block Error Rate,BLER)作为性能指标时,所提出的基于二维卷积的自动编译码器无线通信系统在64QAM调制下相比经典自动编译码器无线通信系统和传统OFDM无线通信系统分别提升了17%和60%的性能,本文的仿真分析给出了详细的对比说明.另外本文还分析了不同调制、不同信道时卷积核数量对系统性能的影响.Aiming at the problem that the existing end-to-end automatic codec(auto-codec)wireless communication systems do not perform well in multipath channels,this paper proposes an improved auto-codec end-to-end wireless commu⁃nication system.In the design,by changing the size of the convolution kernel,the two-dimensional convolution is used to combat the frequency selective fading caused by the multipath effect,and the traditional OFDM(Orthogonal Frequency Di⁃vision Multiplexing)module is combined with the auto-codec to increase the system's ability to cope with multipath.At the same time,the performance of one-dimensional convolutional auto-codec wireless communication system,traditional OFDM wireless communication system and the improved auto-codec wireless communication system under multipath chan⁃nel are analyzed by simulation.The results show that the proposed auto-codec wireless communication system based on two-dimensional convolution,compared to the classical auto-codec wireless communication system and the traditional OFDM wireless communication system,improves 17%and 60%in terms of block error rate(BLER)respectively,under 5-path Rayleigh channel,64QAM modulation.The details are given in the simulation analysis.In addition,this paper also an⁃alyzes the impact of the number of convolution kernels on the system performance under different modulations and differ⁃ent channels.

关 键 词：自动编译码器 端到端学习 二维卷积 正交频分复用 多径信道 

分 类 号：TN911.7[电子电信—通信与信息系统]