基于NI USRP-RIO平台的MIMO-OFDM信道估计研究与实现  

Research and implementation of MIMO-OFDM channel estimation based on NI USRP-RIO platform

作　　者：左明阳 陆彦辉[1] 王宁 杨守义[1] 

机构地区：[1]郑州大学信息工程学院,河南郑州450001

出　　处：《现代电子技术》2017年第21期10-14,18,共6页Modern Electronics Technique

基　　金：教育部新世纪优秀人才支持计划(110900531260);国家自然科学基金资助项目(61271421);国家自然科学基金青年科学基金资助项目(61301150);国家自然科学基金青年科学基金资助项目(61401402);河南省重大科技攻关项目(112102210507);优秀青年教师发展基金(1421318085);东南大学移动通信国家重点实验室开放课题(2015D04)

摘　　要：基于NI通用软件无线电平台(USRP-RIO),完成了MIMO-OFDM通信系统物理层设计,重点编写了信道估计相关的LabVIEW程序,分析并验证了经典频域LS信道估计和时域LS信道估计算法的性能。测试数据表明,在基于对数距离路径损耗模型的莱斯衰落信道环境下,时域LS信道估计误码性能优于频域LS信道估计,这一结果和理论分析相吻合,并且验证了系统实现的正确性。On the basis of universal software radio peripheral-compact reconfigurable input/output(USRP-RIO)platform made by National Instruments(NI),the physical layer of multiple input multiple output-orthogonal frequency division multiplexing(MIMO-OFDM)radio frequency(RF)communication system was designed,the LabVIEW program related to channel estimation was compiled emphatically,and the performances of the classical frequency-domain least square(LS)channel estimation method and time-domain LS channel estimation method were analyzed and verified. The test data demonstrates that the bit error rate of time-domain LS channel estimation method is superior to that of the frequency-domain LS channel estimation method in the Rician fading channel environment based on logarithmic distance path loss model,which is consistent with the theoretical analysis. The validity of the system implementation was verified.

关 键 词：NI USRP-RIO MIMO-OFDM 信道估计 最小二乘法 

分 类 号：TN948.14[电子电信—信号与信息处理]