| MIMO-OFDM系统中一种改进的符号同步算法 |
| |
| 引用本文： | 张宇,张乃通.MIMO-OFDM系统中一种改进的符号同步算法[J].科学技术与工程,2009,9(15). |
| |
| 作者姓名： | 张宇 张乃通 |
| |
| 作者单位： | 哈尔滨工业大学电子与信息技术研究院,哈尔滨,150001 |
| |
| 基金项目： | 国家重点基础研究发展计划课题 |
| |
| 摘 要： | 为了提高基于传统训练序列的符号定时同步的精度,提出了一种改进的用于MIMO-OFDM符号同步的正交前导结构.该方法将传统正交前导结构中最后一个短训练序列的前半个周期进行了相位反转,使得基于改进的前导结构的接收信号与自身周期延时信号的互相关结果中产生一个明显的下陷,因此这可以在多径环境下更准确的获得短训练序列与长训练序列的分界点,从而有效的提高多径环境下MIMO-OFDM系统符号同步的精度.仿真结果表明,在AWGN信道及Rayleigh衰落信道下,这种改进的前导结构在符号同步中有很好的性能.
|
| 关 键 词： | 多输入多输出系统 正交频分复用 符号同步 |
Efficient Symbol Timing Estimation Method for MIMO-OFDM Systems |
| |
| ZHANG Yu,ZHANG Nai-tong.Efficient Symbol Timing Estimation Method for MIMO-OFDM Systems[J].Science Technology and Engineering,2009,9(15). |
| |
| Authors: | ZHANG Yu ZHANG Nai-tong |
| |
| Institution: | School of Electronics and Information Technology;Harbin Institute of Technology;Harbin 150001;P.R.China |
| |
| Abstract: | In order to improve the accuracy of the symbol timing synchronization which obtained by using the conventional method,a modified preamble structure for MIMO-OFDM symbol timing synchronization is proposed. The proposed method creates a sharp fall in the delayed correlation of the samples at the last short preamble period by phase reversing the first half of the last short preamble samples and hence helps more reliable estimation of the end of the short preamble or the start of the long preamble boundary espe... |
| |
| Keywords: | multiple-input multiple-output systems orthogonal frequency division multiplexing symbol timing synchronization |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
