| 引入加权系数的OFDM同步算法研究 |
| |
| 引用本文： | 田野,谈振辉,温伟刚. 引入加权系数的OFDM同步算法研究[J]. 北京交通大学学报(自然科学版), 2007, 31(2): 29-33 |
| |
| 作者姓名： | 田野 谈振辉 温伟刚 |
| |
| 作者单位： | 轨道交通控制与安全国家重点实验室;轨道交通控制与安全国家重点实验室 |
| |
| 摘 要： | 提出了一种改进的OFDM联合时间频率时域快速同步算法，通过引入加权系数，本算法使用一个OFDM符号长度的训练符号，就可以在时域很好的完成AWGN信道下OFDM通信系统的同步．该算法具有较高的定时同步精度和较快的同步速度．同时，对通过引入加权系数后可以灵活设计训练符号结构的算法进行研究．通过理论分析和仿真得出结论，在多径衰落信道下，加权系数的使用必须满足一定条件，才不会影响频偏估计性能．
|
| 关 键 词： | 正交频分复用 定时同步 加权系数 频偏 |
| 文章编号： | 1673-0291(2007)02-0029-05 |
| 修稿时间： | 2006-09-25 |
Research on the Weighted-Factors-Introduced Synchronization Method for OFDM |
| |
| TIAN Ye,TAN Zhen-hui,WEN Wei-gang. Research on the Weighted-Factors-Introduced Synchronization Method for OFDM[J]. JOURNAL OF BEIJING JIAOTONG UNIVERSITY, 2007, 31(2): 29-33 |
| |
| Authors: | TIAN Ye TAN Zhen-hui WEN Wei-gang |
| |
| Abstract: | This paper proposes an improved joint timing and frequency fast synchronization method re- alized in time domain for OFDM communication system in AWGN channel.By introducing the weighed-factors,the new method can perfectly realize the synchronization task by using only one train- ing sequence.The improved algorithm can also improve the timing synchronization accuracy and the synchronization speed.Meantime,the algoriohm which can design the training sequence freely by in- troducing the weighted-factors is also studied.By theory analysis and computer simulation,a conclusion is drawn as follow:In multipath Channel,the usage of weighed-factors must fit some conditions,oth- erwise the accuracy of frequency estimation will be reduced. |
| |
| Keywords: | orthogonal frequency division multiplexing(OFDM) timing synchronization weighted-factors frequency offset |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
