针对判决反馈均衡器的部分IIR提前结构及其应用  

Partial IIR move up structure and its application in decision feedback equalizer

作　　者：归琳[1] 邹志永[1] 仇佩亮[1] 王匡[1] 董斌[1] 

机构地区：[1]浙江大学信息与电子工程学系,浙江杭州310027

出　　处：《电视技术》2002年第2期8-11,共4页Video Engineering

摘　　要：给出了一种可以用于高速数字接收的特殊的判决反馈均衡器结构。为减少FIR内多径传播影响到IIR内的多径响应,而将部分IIR提前于FIR,以得到更快的系数收敛速度。在此基础上的数据仿真,比较了提前结构同普通结构的性能差异,验证了该结构可以使均衡器在严重畸变的信道条件下得到更快的收敛速度。最后,介绍了提前结构在最新的高清晰度电视8VSB接收机中的应用。A modified structure of decision feedback equalizer(DFE)is proposed in high-speed digital com-munication.Avoiding that the DFE feedforward filter will spread out the channel postcursor response,this struc-ture called partial feedback equalizer(PFE)can partially cancel the postcursor ISI prior to feedforward filtering.It enables the equalizer to get faster weight coefficients convergence than ordinary structure.The simulation results of the comparison between the modified structure and ordinary structure validate the good performance of the faster convergence in the condition of severely distorted channel.At last,we also introduce the applications of the sepa-rated structure in8-VSB receiver in High Definition Television(HDTV).

关 键 词：判决反馈均衡器 无限冲击响应 有限冲击响应 ⅡR 

分 类 号：TN715[电子电信—电路与系统]