基于USRP平台的MIMO通信系统的设计与实现  

Design of MIMO communication systems based on USRP platform

作　　者：冯姣 刘文[1] 李鹏[1] FENG Jiao;LIU Wen;LI Peng(School of Electronic and Information Engineering,Nanjing University of Information Science and Technology,Nanjing 210044,China)

机构地区：[1]南京信息工程大学电子与信息工程学院,江苏南京210044

出　　处：《电子设计工程》2020年第18期65-70,75,共7页Electronic Design Engineering

基　　金：国家自然科学基金项目(61501244,61501245);江苏省自然科学基金(BK20150932)。

摘　　要：针对通信教学和科研领域,相对理想的仿真环境限制了学生的创新能力、仿真信道与真实传输信道存在差距、软件仿真结果与真实实验结果相差甚远的问题。利用通用软件无线电外设,搭建了一种基于多输入多输出(Multiple-Input Multiple-Output,MIMO)技术的通信系统。通过利用频域最小二乘(Least Square,LS)算法估计信道并采用最大似然(Maximum Likelihood,ML)算法来检测接收到的信号。实验结果表明,所搭建的基于USRP平台的MIMO通信系统能够更贴近现实的通信系统,使实验结果更具说服力,同时实现从通信理论研究到实际运用的过渡。Aiming at the problem of the relatively ideal simulation environment has limited students'ability to innovate,there is a gap between the simulation channel and the real transmission channel,and the software simulation results are far from the actual experimental results in the field of communication teaching and scientific research.This paper exploits general software radio peripheral to build a Multiple-Input Multiple-Output(MIMO)communication system,which estimates the channel by using the frequency domain Least Squares(LS)algorithm and detects the received signal with the aid of Maximum Likelihood(ML)algorithm.The experimental results show that based on the software radio peripherals,the MIMO communication system becomes more realistic.Hence,the experimental results are more convincing.The transition from the communication algorithm theory to practical application is realized by implementing the communication system on the software radio peripherals.

关 键 词：空时编码 LABVIEW USRP MIMO 

分 类 号：TN85[电子电信—信息与通信工程]