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Kyungchul Kwak, Sungeun Lee, Jihyung Kim, Daesik Hong, "A New DFT-Based Channel Estimation Approach for OFDM with Virtual Subcarriers by Leakage Estimation", IEEE Trans. Wireless Comm., Jun 2008
[IEEE Trans. Wireless Commun.]
조회 85200
Status : | Published |
---|---|
Date : | 2008-06 |
Title : | A New DFT-Based Channel Estimation Approach for OFDM with Virtual Subcarriers by Leakage Estimation |
Authors : | Kyungchul Kwak, Sungeun Lee, Jihyung Kim, Daesik Hong |
Journal : | IEEE Transactions on Wireless Communications |
Abstract : | Equidistance in pilot spacing is an essential condition for discrete Fourier transform (DFT)-based channel estimation in OFDM systems. However, virtual subcarriers break this condition, degrade the estimation performance, and cause the interference (called ''leakage') because the orthogonality of Fourier matrix is broken. To solve this problem, we first analyze the leakage using the DFT-inverse DFT process. The pilot subcarriers inside virtual subcarriers area are estimated by the inverse of the estimated leakage. Thus, the equidistance condition is satisfied. The proposed estimator operates well in realistic environment such as IEEE 802.16, and it is robust to an increase of virtual subcarriers. |
URL : | http://ieeexplore.ieee.org/xpls/abs_all....&tag=1 |
Download : | http://mirinae.yonsei.ac.kr/?module=file...168fbf1a11 |
Kwak, K.; Lee, S.; Hong, D.; Jihyung Kim; , "A New DFT-Based Channel Estimation
Approach for OFDM with Virtual Subcarriers by Leakage Estimation," Wireless
Communications, IEEE Transactions on , vol.7, no.6, pp.2004-2008, June
2008
doi: 10.1109/TWC.2008.061093
URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=4543048&isnumber=4543041
doi: 10.1109/TWC.2008.061093
URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=4543048&isnumber=4543041
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