一种分数间隔MMSE块均衡器  

Fractionally-Spaced Minimum Mean-Square-Error Block Equalizer

作　　者：陈雪冰[1] 杨喜根[2] 沈忠良[3] 

机构地区：[1]解放军理工大学通信工程学院研四队,江苏南京210007 [2]解放军理工大学通信工程学院卫星通信系,江苏南京210007 [3]解放军理工大学通信工程学院无线通信系,江苏南京210007

出　　处：《系统仿真学报》2008年第7期1786-1790,共5页Journal of System Simulation

摘　　要：针对符号间隔块均衡器有着对定时误差非常敏感的缺点,提出了一种分数间隔MMSE块均衡器,包括线性均衡器和判决反馈均衡器。该均衡器可以用于非理想信道块通信系统中消除码间串扰,也可以应用在码分多址通信中进行联合检测。计算机仿真结果表明,与传统MMSE块均衡器相比,该均衡器在计算复杂度增加极小的情况下获得了较大的性能提升,而且对定时误差不敏感。A block equalizer is suitable to overcome the intersymbol interference （ISI） for a block transmission system, in which the information symbols are arranged in the form of blocks separated by known symbols. It also can be used to perform joint detection for CDMA systems. Concerning that symbol-spaced block equalizer is sensitive to timing error, a fractionally-spaced Minimum-Mean-Square-Error block equalizer （FS-MMSE-BE） was proposed. Both linear equalizer （LE） and decision-feedback equalizer （DFE） algorithms were given. Performance simulations and comparisons were also presented The results show that they perform better than conventional block equalizers, while the complexity increasing is very small. Moreover, the proposed equalizer is not sensitive to timing error.

关 键 词：MMSE 块均衡器 分数间隔 线性均衡器 判决反馈均衡器 

分 类 号：TN391.93[电子电信—物理电子学]