一种基于CNN自编码器的空间调制技术  

A CNN Autoencoder Based Spatial Modulation Technology Scheme

作　　者：任嘉欣 王旭东[2] 吴楠[2] REN Jiaxin;WANG Xudong;WU Nan(School of Computer and Software,Dalian Neusoft University of Information,Dalian 116023,China;College of Information and Technology,Dalian Maritime University,Dalian 116026,China)

机构地区：[1]大连东软信息学院计算机与软件学院,辽宁大连116023 [2]大连海事大学信息科学技术学院,辽宁大连116026

出　　处：《电讯技术》2024年第11期1772-1779,共8页Telecommunication Engineering

基　　金：国家自然科学基金资助项目(61801074)。

摘　　要：针对传统空间调制系统结构优化及复杂度较高的缺陷,提出了一种基于自动编码器的空间调制系统设计方案(Autoencoder Based Spatial Modulation Multiple-Input Multiple-Output,AE-SM-MIMO)。该方案通过使用卷积神经网络来构建系统的编码器和解码器,进行空间调制的端到端学习,进而实现不同发射天线、接收天线以及调制方式下信息比特流的传输与接收,在系统误码性能和复杂度之间提供了较好的平衡。在瑞利衰落信道环境下,将所提出的基于卷积神经网络的AE-SM-MIMO系统方案与传统的空间调制系统进行性能对比,实验结果表明,AE-SM-MIMO系统方案可获得接近最大似然检测算法的误码性能,并表现出了良好的适应性和泛化能力。此外,相比于传统最大似然检测算法和最大比合并检测算法,在4发2收BPSK调制方式下AE-SM-MIMO系统方案需要更少的计算时间,分别减少了78%和26%,大大降低了系统的时间复杂度。For the optimization of traditional spatial modulation system structure and the defects of high complexity,a spatial modulation system design scheme based on automatic encoder(AE-SM-MIMO)is proposed.In this scheme,the encoder and decoder of the system are constructed by using convolutional neural network,and the end-to-end learning of spatial modulation is carried out,so as to realize the transmission and reception of information bit streams under different transmitting antennas,receiving antennas and different modulation modes.The system provides a good balance between error performance and complexity.In Rayleigh fading channel environment,the performance of the proposed AE-SM-MIMO system scheme based on the convolutional neural network(CNN)is compared with that of the traditional spatial modulation system.The experimental results show that the AE-SM-MIMO system scheme can achieve the error performance close to the maximum likelihood detection algorithm,and shows good adaptability and generalization ability.In addition,compared with traditional maximum likelihood detection algorithm and maximum ratio combining detection algorithm,AE-SM-MIMO system scheme in the BPSK modulation mode with four transmitting antennas and two receiving antennas requires less computing time,which is reduced by 78%and 26%respectively,and greatly reduces the time complexity of the system.

关 键 词：空间调制 自编码器 卷积神经网络 瑞利衰落信道 

分 类 号：TN929.5[电子电信—通信与信息系统]