基于天线对比测试法的MIMO-OFDM系统设计与分析  

Design and analysis of MIMO-OFDM system based on antenna comparison testing method

作　　者：毛文杰 朱其刚 杨金梁[1] 任丙忠[1] 张帅帅 MAO Wenjie;ZHU Qigang;YANG Jinliang;REN Bingzhong;ZHANG Shuaishuai(Department of Electrical Engineering&Information Technology,Shandong University of Science and Technology,Jinan 250031,China)

机构地区：[1]山东科技大学电气信息系,山东济南250031

出　　处：《现代电子技术》2021年第11期23-26,共4页Modern Electronics Technique

基　　金：国家自然科学基金项目资助(61703243);2018年山东省本科高校教学改革研究项目资助(M2018X218);山东科技大学优秀教学团队建设计划资助(JXTD20180510)。

摘　　要：多输入多输出正交频分复用(MIMO-OFDM)系统能够结合MIMO和OFDM技术优势,提升频带利用率。文中分析研究了MIMO和OFDM系统基本原理,采用FFT和QPSK技术实现了MIMO-OFDM系统的设计,空时编码采用Alamouti编码,信道编码采用RS编码,并在Matlab环境下对系统进行仿真与性能分析。采用收发天线对比测试法,确定不同天线阵列系统运行参数,证明了MIMO-OFDM系统的性能优势。结果显示,MIMO-OFDM系统能够抑制频率选择性衰落信道影响,在收发天线功率不变的情况下大幅度提高信道容量,有效降低传输误码率,与基本理论分析结果吻合。The multiple-input multiple-output(MIMO)orthogonal frequency division multiplexing(OFDM)system can improve the spectrum efficiency by combining the technological advantages of MIMO and OFDM.The basic principles of MIMO and OFDM are analyzed.The MIMO-OFDM system is designed with the technologies of FFT(fast Fourier transform)and QPSK(quadrature phase shift keying).The Alamouti code is used for space-time coding,while the RS code is used for the channel coding.The system simulation and performance analysis are finished on the Matlab platform.The receiving and transmitting antenna comparison testing method is used to determine the operation parameters of different antenna array system,and prove that the performance of the MIMO-OFDM system is superior.The simulation results show that the designed system can suppress the influence of frequency-selective fading channel,greatly improve the channel capacity and reduce the bit error rate effectively when the power of the receiving and transmitting antenna is constant,which are in accordance with the theoretical analysis result.

关 键 词：MIMO-OFDM系统 空时编码 运行参数 系统仿真 系统误码率 对比测试 

分 类 号：TN820.15-34[电子电信—信息与通信工程]