| 摘要: |
| 针对实际应用中信道先验信息未知时无法求解信道相关矩阵的问题，提出了一种改
进的叠加训练序列的判决指导信道估计方法。该方法利用每次迭代的信道估计值求解信道相
关矩阵。推导了该方法中信道相关矩阵的求解公式。仿真结果表明，在未知信道先验信息的
情况下，与利用信道先验信息的叠加训练序列的信道估计方法相比，改进方法取得了与之几
乎一样的性能，因此改进方法更适用于实际应用。 |
| 关键词: OFDM 信道估计 叠加训练序列 判决指导 |
| DOI： |
|
| 基金项目:国家自然科学基金资助项目（60702020） |
|
| Superimposed Training Sequence with Decision directed Channel Estimation |
| LIU Qiu-ge,MU Xiao-min,LU Yan-hui |
| (School of Information Engineering, Zhengzhou University, Zhengzhou 450001, Chin
a) |
| Abstract: |
| As it can not compute the channel correlation matrix without the chann
el′s prior information in the practical application, an improved superimposed t
raining sequence decisiondirected channel estimation algorithm is proposed. Th
e algorithm can accurately compute the channel′s correlation matrix by using
the channel′s estimated value of the last iterative result. In this paper, the
calculation formula of the channel correlation matrix is deduced. Simulation res
ults show that the improved algorithm without any channel′s priori information
obtains almost the same performance compared with the original algorithm which
uses the channel′s priori information to compute the channel correlation matrix
. So the improved algorithm is more suitable for the practical application. |
| Key words: OFDM channel estimation superimposed training sequence decision directed |
《电讯技术》编辑部 