%0 Journal Article
%T SC-FDE System Based On LDPC Codes<br>基于LDPC码的单载波频域均衡系统
%A Jing Long-jiang
%A Liu Guang-Hui
%A Lin Jing-Li
%A Zhu Wei-le
%A <br>敬龙江
%A 刘光辉
%A 林竞力
%A 朱维乐
%J 电子与信息学报
%D 2008
%I 
%X This paper introduces a single-carrier system with hybrid time-frequency domain Decision Feedback Equalization (DFE), in which the short pn (Pseudo-Noise) sequence with fixed waveform replaces the cyclic prefix (CP) in the conventional Single Carrier systems with Frequency Domain Equalization (SC-FDE), and the long PN sequences composed of several short pn sequences are employed as the channel training sequences to complete the initial estimation and tracking for fast-varying channel. In this system, the received training sequences are averaged in time domain and then the channel is estimated in frequency domain. In comparison with traditional SC-FDE systems, its complexity is lower. Furthermore, an approach of adding sum-check blocks to original Low-Density Parity-Check (LDPC) blocks is presented, and the effective improvements of this system performance can be achieved. Finally, the simulation results show that this system works well over the fading channel.
%K Single carrier system
%K Low-Density Parity-Check (LDPC) codes
%K Frequency Domain Equalization (FDE)
%K Decision Feedback Equalization (DFE)
%K Cyclic Prefix (CP)<br>单载波系统
%K LDPC码
%K 频域均衡
%K 判决-反馈均衡
%K 循环前缀
%K LDPC
%K Codes
%K 单载波频域均衡
%K 均衡系统
%K Based
%K 仿真结果
%K 多径衰落信道
%K 整体性能
%K 信噪比门限
%K 校验
%K 计算复杂度
%K 训练算法
%K 初始估计
%K 信道信息
%K 训练序列
%K 接收
%K 跟踪问题
%K 快变信道
%K 组成
%K 循环前缀
%K 波形
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=EFC0377B03BD8D0EF4BBB548AC5F739A&aid=ACDB5E5906FBF0ACA803AEFDA6B1825B&yid=67289AFF6305E306&vid=340AC2BF8E7AB4FD&iid=E158A972A605785F&sid=92DE343A8428AA81&eid=08F83145FA367D52&journal_id=1009-5896&journal_name=电子与信息学报&referenced_num=0&reference_num=11