| MIMO-OFDM无线传输系统中的信道估计 |
| |
| 引用本文： | 柴关华,徐友云,张冬梅.MIMO-OFDM无线传输系统中的信道估计[J].解放军理工大学学报,2005,6(4):307-311. |
| |
| 作者姓名： | 柴关华 徐友云 张冬梅 |
| |
| 作者单位： | 解放军理工大学通信工程学院 江苏南京210007
(柴关华，徐友云)，解放军理工大学通信工程学院 江苏南京210007(张冬梅) |
| |
| 基金项目： | 国家863计划资助项目（2003AAl2331007） |
| |
| 摘 要： | 以2×2多输入多输出正交频分复用(MIMO-OFDM)非盲信道估计方法为研究对象,分析了该系统中基于时域训练序列,结合空时分组码的直接判决信道估计方法和基于Wiener内插的信道估计方法仿真比较了其性能。结果表明,当多普勒频移较小时,可采用简单的直接判决方法进行信道估计;多普勒频移较大时,宜采用维纳内插方法进行信道估计,且可以提高信道估计精度。
|
| 关 键 词： | 多输入多输出 正交频分复用 信道估计 直接判决 Wiener内插 |
| 文章编号： | 1009-3443(2005)04-0307-05 |
| 收稿时间： | 2004-10-20 |
| 修稿时间： | 2004年10月20 |
Channel estimation for MIMO-OFDM wireless transmission systems |
| |
| CHAI Guan-hu,XU You-yun and ZHANG Dong-mei.Channel estimation for MIMO-OFDM wireless transmission systems[J].Journal of PLA University of Science and Technology(Natural Science Edition),2005,6(4):307-311. |
| |
| Authors: | CHAI Guan-hu XU You-yun and ZHANG Dong-mei |
| |
| Institution: | Institute of Communications Engineering,PLA Univ.of Sci.& Tech.,Nanjing 210007,China;Institute of Communications Engineering,PLA Univ.of Sci.& Tech.,Nanjing 210007,China;Institute of Communications Engineering,PLA Univ.of Sci.& Tech.,Nanjing 210007,China |
| |
| Abstract: | The non-blind channel estimation algorithm for 22 MIMIO-OFDM wireless transmission systems was investigated. Two algorithms were studied. They were the direct-sequence-judging algorithm with time-domain training sequence based on the use of space-time block coding(STBC) and the Wiener interpolating channel estimation algorithm. Performance of the algorithms were simulated. The results show that the former algorithm is effective when Doppler frequency shift is slow. The Weiner algorithm can improve the estimation precision and it is more suitable when Doppler frequency shift is fast. |
| |
| Keywords: | MIMO(multi input multi output) OFDM(orthogonal frequency division multiplexing) channel estimation dicision-directed Weiner interpolating |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《解放军理工大学学报》浏览原始摘要信息 |
| 点击此处可从《解放军理工大学学报》下载免费的PDF全文 |
