短波多径衰落信道下的判决反馈均衡器研究  

RESEARCH ON DFE IN CONDITION OF SHORTWAVE MULTI-PATH FADING CHANNELS

作　　者：韩俊峰[1] 段田东[1] 徐翔辉[1] 张建云 

机构地区：[1]解放军信息工程大学信息工程学院 [2]65016部队

出　　处：《计算机应用与软件》2010年第9期212-215,共4页Computer Applications and Software

摘　　要：判决反馈均衡器(DFE)主要有两种基本类型:直接调整抽头系数的传统DFE和通过估计信道冲激响应直接计算均衡器抽头系数的基于信道估计DFE。研究两种基本的DFE和一种改进的基于信道估计DFE在短波多径衰落信道下的性能。仿真结果显示,基于信道估计DFE尤其是改进的基于信道估计DFE,在对抗信道的时变性方面与传统DFE相比,具有更强的鲁棒性,更适合在短波通信中使用。There are two basic types of decision-feedback equalization （DFE） ：the conventional DFE which adjust tap coefficients directly and the channel-estimation-based DFE which directly calculate DFE＇ s tap coefficients by estimating the impulse response of channel. This pa- per presents an investigation on these two types of DFE and the performance of an improved channel-estimation-based DFE in condition of shortwave multi-path fading channels. Simulation results show that the channel-estimation-based DFE, especially the improved one,is much robust against channel time variations than the conventional DFE does and more suitable to work for HF communication.

关 键 词：自适应均衡 短波信道 信道估计 多普勒扩展 

分 类 号：TN715[电子电信—电路与系统]