短波信道中单载波频域均衡技术研究  

Research on the Frequency Domain Equalization of Single Carrier System Applied in HF Channels

作　　者：司璐[1] 余心乐[1] SI Lu;Yu Xin-le(ECDAV,Communication University of China,Beijing 100024,China)

机构地区：[1]中国传媒大学广播电视数字化教育部工程研究中心,北京100024

出　　处：《中国传媒大学学报（自然科学版）》2018年第3期42-47,共6页Journal of Communication University of China：Science and Technology

摘　　要：短波信道多径衰落严重,正交频分复用(OFDM)技术可以有效的对抗信道多径特性,但是存在峰均比大和对频偏极其敏感等缺点,单载波频域均衡(SC-FDE)技术在避免OFDM缺点的同时,具有良好的抗多径能力和较低的结构复杂度。本文阐述了单载波频域均衡技术的原理及实现方案,分析了几种主要的频域均衡算法,在短波信道模型下对各种算法进行系统仿真并给出性能曲线。The OFDM system can mitigate the multipath fading effectively in HF channels.But it has large Peak to Average Power Ratio(PAPR),and it’s extremely sensitive to frequency offset.The application of SC-FDE avoids the shortcomings of OFDM,meanwhile it has good anti-multipath capability and low complexity.In this paper,the principle of a SC-FDE system and the method for implementing the same are set forth.Also,the main algorithms of frequency domain equalizaiton are analyzed,and these algorithms are simulated in a SC-FDE system with a model of HF channel,and the corresponding performance curves are given.

关 键 词：短波信道 多径效应 单载波频域均衡 DFE BER 

分 类 号：TN911.5[电子电信—通信与信息系统]