| 摘要: |
| 提出了基于梳状导频分布的OFDM信道估计的改进算法，分别在基于频域（DFT）和时
域（IDFT）的迫零内插算法的基础上运用了数据翻转的思想。该算法可以大大地减少DFT/ID
FT变换时所产生的边缘效应，并且通过优化边缘位置的估计性能来提升整个OFDM信道估计的
精确度。仿真结果表明，该算法相比经典算法在性能上有较大提升。 |
| 关键词: OFDM 信道估计 梳状导频 数据翻转 DFT/IDFT |
| DOI： |
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| 基金项目:国家自然科技基金资助项目(60872037）；国家航天“十一五”预研项目
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| An Improved Channel Estimation Algorithm Based on Comb type Pilot in OFDM Systems |
| GONG Gang,LEI Wei-jia,XIE Xian-zhong |
| (Institute of Personal Communication,Chongqing University of Posts and Telecommunications,Chongqing 400065,China) |
| Abstract: |
| A new channel estimation algorithm is proposed based on comb type pilot
in OFDM systems, which employs data flipping in the frequency or time d
omain interpolation based on zero padding and DFT/IDFT.This algorithm can sign
ificantly reduce the Gibbs phenomenon caused by DFT/IDFT, so that it can improve
the OFDM estimation accuracy by optimizing the interpolation accuracy of periph
ery. Simulation result shows that this algorithm has a better performance compar
ed with other classic methods. |
| Key words: OFDM channel estimation comb pilot data flipping DFT/IDFT |
