| 正交频分复用技术在协作通信下的应用 |
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| 引用本文： | 胡 强,林飞飞,覃团发.正交频分复用技术在协作通信下的应用[J].太赫兹科学与电子信息学报,2012,10(2):143-147. |
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| 作者姓名： | 胡 强 林飞飞 覃团发 |
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| 作者单位： | 广西大学计算机与电子信息学院,广西南宁,530004 |
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| 基金项目： | 广西教育厅研究生创新计划资助项目(105931003081) |
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| 摘 要： | 协作分集技术利用其他用户进行协作传输,可以获得一定的分集增益,但是在频率选择性衰落信道下性能不很乐观。为了对抗频率选择性衰落,采用正交频分复用(ODFM)技术与协作分集技术相结合的方法,研究了基于OFDM技术的协作通信,对在不同调制技术、不同信道估计方法下系统的性能进行了比较,为了进一步提高系统性能,对传统S&C算法进行了改进并应用于该系统中,仿真实验结果表明,改进的定时同步算法性能优于传统的S&C算法。
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| 关 键 词： | 协作分集 正交频分复用 信道估计 频率选择性衰落 S&C算法 |
| 收稿时间： | 2011/2/28 0:00:00 |
| 修稿时间： | 2011/3/21 0:00:00 |
Performance analysis of OFDM cooperative communication systems |
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| HU Qiang,LIN Fei-fei and QIN Tuan-fa.Performance analysis of OFDM cooperative communication systems[J].Journal of Terahertz Science and Electronic Information Technology,2012,10(2):143-147. |
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| Authors: | HU Qiang LIN Fei-fei and QIN Tuan-fa |
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| Affiliation: | (College of Computer and Electronic Information,Guangxi University,Nanning Guangxi 530004,China) |
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| Abstract: | Cooperative diversity transmission can get some diversity gain through the collaboration of other users,whereas the frequency selective fading channel performance is not optimistic.To counteract frequency selective fading,Orthogonal Frequency Division Multiplexing(OFDM) technology and cooperative diversity combining method are adopted to study collaborative communication based on OFDM technology.The system performance in different modulation techniques and different channel estimation methods is compared.The traditional S&C(Schmidl and Cox) algorithm is improved and applied to the system in order to further improve its performance.Simulation results show that the performance of improved timing synchronization is superior to that of the traditional S&C algorithm. |
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| Keywords: | cooperative diversity OFDM channel estimation frequency selective fading S&C algorithm |
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