编码符号串扰信道的迭代判决反馈均衡算法  

Iterative Decision Feedback Equalizer for Coded ISI Channels

作　　者：吴晓富[1] 凌聪[1] 吕晶[1] 

机构地区：[1]南京通信工程学院卫星通信重点实验室,江苏南京210016

出　　处：《电子学报》2001年第9期1192-1194,共3页Acta Electronica Sinica

基　　金：东南大学访问学者基金;国家自然科学基金(No.60002010)

摘　　要：本文提出了编码符号串扰信道的两种迭代判决反馈均衡（DFE）算法.采用Turbo原则将卷积 码Viterbi译码后的判决经重编码、交织后反馈到前端的判决反馈均衡部分，每次迭代时由 于 DFE中判决反馈部分来自于经Viterbi译码后的重编码值（因而更可靠）,经多次迭代后,系统 误码率能得到显著提高.由于采用了DFE算法及迭代硬判反馈结构,系统复杂度较低,从而具有 较高的实用价值.In this paper,we show that the performance of conventional Decision Feedback Equ alizer (DFE) followed by Viterbi decoding for coded Inter Symbol Interference ( ISI) channels may be improved significantly by iterative use of decoding information.At each iteration,DFE may outperform its original form since now feedback decisions are more reliable as some errors are corrected by Viterbi decoding.The proposed algorithms may find some practical applications since they have relatively low complexity.

关 键 词：判决反馈均衡 符号串扰 算法 编码符号 串扰信道 

分 类 号：TN911.5[电子电信—通信与信息系统]