OFDM Multiple Antennas Cognitive Radio Relay CDMA Synchronization Channel Estimation Spectrum Sharing Interference Cancellation Resource Allocation Spectrum Sensing Neural Networks Full duplex Stochastic Geometry Equalizer Bi-Directional Feedback Energy Harvesting Heterogeneous Networks Femtocell Device-to-Device (D2D) Idle cells Cross-link interference FBMC Spectral efficiency Cell Search SINR mismatch problem NOMA Ultra-dense small cell networks HetNet interference management Dynamic TDD outage probability selection diversity achievable sum rate bursty traffic model Cognitive relay networks mode selection multi-spectral 5G Complexity Singular Vale Decomposition OQAM tabu-search Filtered OFDM TDD configuration flexible duplex Handoff GFDM Heterogeneous channel estimation capability self-interference cancellation in-band full-duplex system Channel estimation error coexistence CP-OFDM MU-MIMO automatic repeat request (ARQ) Two-way communications UWB full-duplex relay full-duplex cellular Simultaneous Sensing and Transmission Correlated MIMO transmission capacity (TC) sensing duration Bi-directional full-duplex Vehicle-to-Vehicle prototype filter pilot signal Coexistence scenarios resource size control Vehicle-to-vehicle communication link reliability interference to noise ratio eigen decomposition TS-W-OFDM Resource management Cooperative systems LTE-based V2V Aggregate interference time-frequency efficiency mixed numerology Windowing Reliability C-V2V Asynchronous Transmission Full-duplex Computation offloading Grant-free Transmission Preamble full-spreading NOMA massive connectivity Edge computing Multiple access MLP Deep learning Railway Mobility interference mitigation HST non-orthogonal multiple access
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
List of Articles
No.
Statussort Date
10 [IEEE Trans. Wireless Commun.] Hyejin Kim, Yosub Park, Jintae Kim and Daesik Hong, "A Low-Complex SVD-Based F-OFDM," in IEEE Transactions on Wireless Communications, Feb. 2020 Published  2019-10 
9 [IEEE Trans. Wireless Commun.] Jaeyoung Choi, Beomju Kim, Kwonjong Lee, and Daesik Hong, "A Transceiver Design for Spectrum Sharing in Mixed Numerology Environments", IEEE Trans. on Wireless Comm., Mar. 2019 Published  2019-03 
8 [IEEE Trans. Wireless Commun.] Sungmook Lim, Gosan Noh, Hyungjong Kim, and Daesik Hong, "Optimal Tone Space Selection Scheme for OFDMA-VTS in Carrier Aggregation," IEEE Trans. Wireless Commun., Nov. 2013 file Published  2013-11 
7 [IEEE Trans. Wireless Commun.] Kyungchul Kwak, Sungeun Lee, Hyunkee Min, Sooyong Choi, and Daesik Hong, "New OFDM Channel Estimation with Dual-ICI Cancellation in Highly Mobile Channel," IEEE Trans. Wireless Commun., Oct. 2010 file Published  2010-10 
6 [IEEE Trans. Wireless Commun.] Jemin Lee, Hano Wang and Daesik Hong, "QoS-guaranteed Transmission Mode Selection for Efficient Resource Utilization in Multi-hop Cellular Networks", IEEE Trans. Wireless Comm., Oct 2008 file Published  2008-10 
5 [IEEE Trans. Wireless Commun.] Woohyun Seo, Myeongyon Cho and Daesik Hong, "A New Full-band Feedback Scheme Using the Adaptive Grouping Method in OFDMA Systems", IEEE Trans. Wireless Comm., Jun 2008 file Published  2008-06 
4 [IEEE Trans. Wireless Commun.] Sungeun Lee, Kyungchul Kwak, Jihyung Kim and Daesik Hong, "Channel estimation approach with variable pilot density to mitigate interference over time-selective cellular OFDM systems" IEEE Trans. Wireless Comm., Dec 2007 file Published  2007-12 
» [IEEE Trans. Wireless Commun.] 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 file Published  2008-06 
2 [IEEE Trans. Wireless Commun.] Myeongyun. Cho, Woohyun Seo and Daesik Hong, "A joint feedback reduction scheme using delta modulation for dynamic channel allocation in OFDMA systems", IEEE Trans. Wireless Comm., Jan 2007 Published  2007-01 
1 [IEEE Trans. Wireless Commun.] Jeongho Park, Jihyung Kim, Myonghee Park, Kyunbyoung Ko, Changeon Kang and Daesik Hong, "Performance analysis of channel estimation for OFDM systems with residual timing offset", IEEE Trans. WComm., Jul 2006 Published  2006-07