短波通信中MIMO单载波频域均衡算法研究  

Research on MIMO Single-carrier Frequency Domain Equalization Algorithm in HF Communication

作　　者：薛真真[1] 李丽[1] 

机构地区：[1]重庆邮电大学移动通信技术重点实验室,重庆400065

出　　处：《无线电通信技术》2015年第4期17-19,36,共4页Radio Communications Technology

基　　金：重庆市科委项目(CSTC2012jj A40044;cstc2013yykf A40010);重庆市科委重点实验室专项经费;应急通信重庆市重点实验室开放课题资助

摘　　要：短波信道是一个典型的频率选择性衰落信道,需要在接收端采用均衡技术来补偿信道衰落的影响。针对短波信道的特性,介绍了能有效对抗多径干扰的MIMO单载波频域均衡的系统结构,并研究了传统的线性均衡。在此基础上提出了一种改进的频域均衡算法,对信号进行两次均衡,进一步消除了多径分量造成的干扰,并在中度短波信道下验证了改进算法的性能。Matlab仿真结果表明,提出的改进算法降低了误码率,提高了系统性能。HF channel is an example of frequency-selective fading channels,and it is necessary to use the equalization technology in the receiver to compensate for the effects caused by channel fading. Based on the characteristics of HF channel, the MIMO single- carrier frequency domain equalization system is introduced, which can effectively mitigate multipath fading.Then, the traditional linear equalization is studied,based on which an improved frequency equalization algorithm is proposed,which conducts equalization twice to further reduce the interference caused by muhipath components, and the improved algorithm ＇ s performance is verified under HF ehannel.Matlab simulation results show that the proposed algorithm reduces the bit error rate,and improves the performance of the system.

关 键 词：短波通信 多径干扰 MIMOSCFDE 均衡 

分 类 号：TN929.5[电子电信—通信与信息系统]