| 摘要: |
| 从提高多输入多输出正交频分复用（MIMO—OFDM）系统频谱利用率的目的出发，提出了一种改进型的基于EM（Expectation Maximization）算法的信道估计技术。仿真结果表明，改进后的算法可以显著提高频谱利用率，同时保持原算法的精度。 |
| 关键词: 无线通信 信道估计 正交频分复用 多输入多输出 EM算法 |
| DOI：10.3969/j.issn.1001-893X. |
| 投稿时间：2005-04-06修订日期：2005-07-28 |
| 基金项目:国家科技攻关项目 |
|
| An EM-Based Channel Estimation Algorithm for MIMO-OFDM Systems |
|
| () |
| Abstract: |
| An improved EM - based channel estimation algorithm for MIMO - OFDM systems is introduced in order to obtain higher frequency efficiency. The simulation result shows that the new algorithm remarkably improves the frequency efficiency and keeps the precision of the old algorithm at the same time. |
| Key words: wireless communication,channel estimation,orthogonal frequency division multiplexing,multiple-input multiple-output,expectation maximization(EM) algorithm, |
《电讯技术》编辑部 