独特字块结构的单载波时频混合均衡器设计  

Unique word based time-frequency hybrid equalizer for single carrier block transmission

作　　者：朱冰莲[1] 刘海丰[1] 张松[1] 

机构地区：[1]重庆大学通信工程学院,重庆400044

出　　处：《计算机应用》2010年第6期1466-1468,1474,共4页journal of Computer Applications

基　　金：国家自然科学基金资助项目(60872038);重庆大学"211工程"三期创新人才培养计划建设项目(S-09102)

摘　　要：在单载波块传输系统中,提出了一种更适用于基于独特字块结构的时频混合判决反馈均衡器的设计方法。该方法利用独特字的已知特性,在接收端将经过信道的独特字和有用数据分开,再进行均衡处理,恢复出原始数据。根据这一方法,给出了基于独特字块结构的判决反馈均衡器的最优结构和次优结构。仿真结果表明,基于独特字的最优结构时频混合判决反馈均衡器相比传统基于循环前缀的时频混合均衡器性能有很大的提升;复杂度降低的次优时频混合判决反馈均衡器的误码性能仍要好于基于循环前缀的均衡器。For single carrier block transmission,a new design of time-frequency Hybrid Decision Feedback Equalizer （H-DFE） suitable for the Unique Word （UW） extension was proposed.Owing to the known nature of UW,the useful data and UW through the channel at receiver could be separated,and then equalization was conducted and the original data could be restored.Based on this idea,the optimal and suboptimal design of UW based time-frequency Hybrid Decision Feedback Equalizer （H-DFE-UW） were proposed.The simulation results indicate that the performance of the optimal design is highly improved and the suboptimal one is slightly better than Cyclic Prefix （CP） based time-frequency Hybrid Decision Feedback Equalizer （H-DFE-CP）.

关 键 词：单载波块传输 循环前缀 独特字 频域均衡 判决反馈均衡器 

分 类 号：TP393[自动化与计算机技术—计算机应用技术] TN911[自动化与计算机技术—计算机科学与技术]