OFDM Multiple Antennas Cognitive Radio Relay Synchronization CDMA Channel Estimation Spectrum Sharing Interference Cancellation Spectrum Sensing Full duplex Neural Networks Resource Allocation Stochastic Geometry Equalizer Bi-Directional Feedback Heterogeneous Networks Energy Harvesting Femtocell Device-to-Device (D2D) Idle cells FBMC Ultra-dense small cell networks Cell Search Spectral efficiency SINR mismatch problem Cross-link interference HetNet Dynamic TDD self-interference cancellation full-duplex relay in-band full-duplex system automatic repeat request (ARQ) transmission capacity (TC) full-duplex cellular Two-way communications sensing duration selection diversity GFDM interference mitigation Correlated MIMO mode selection multi-spectral outage probability achievable sum rate Cognitive relay networks Vehicular and wireless technologies bursty traffic model UL grant free NOMA Asynchronized system Reliability Latency Cellular networks LTE-TDD Iterative decoder Bi-directional full-duplex OQAM UWB MU-MIMO coexistence Link adaptation beamforming Simultaneous Sensing and Transmission CP-OFDM Long Term Evolution-Advanced Aggregate interference singular value decomposition MIMO 5G networks time-frequency efficiency K-S statistics Time spreading Windowing Vehicle-to-vehicle communication LTE-based V2V interference coordination prototype filter pilot signal TS-W-OFDM eigen decomposition link reliability interference to noise ratio tabu-search resource size control C-V2V Coexistence scenarios interference management Resource management mixed numerology Vehicle-to-Vehicle massive connectivity Complexity non-orthogonal multiple access full-spreading NOMA Filtered OFDM Singular Vale Decomposition 5G flexible duplex Cooperative systems
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.
Status Datesort
18 [IEEE Trans. Wireless Commun.] Jinkyo Jeong, Yosub Park, Sungwoo Weon, Jintae Kim, Sooyong Choi, and Daesik Hong, "Eigendecomposition-Based GFDM for Interference-Free Data Transmission and Pilot Insertion for Channel estimation", IEEE Trans. on Wireless Comm., Aug. 2018 Published  2018-08 
17 [IEEE Commun. Lett.] Yosub Park, Jihaeng Heo, and Daesik Hong, "Spectral Efficiency Analysis of Ultra-Dense Small Cell Networks with Heterogeneous Channel Estimation Capabilities", IEEE Comm. Letters, Apr. 2017 file Published  2017-04 
16 [IEEE Trans. Veh. Technol.] Dongkyu Kim, Hyungsik Ju, Sungsoo Park, and Daesik Hong, "Effects of Channel Estimation Error on Full-duplex Two-way Networks," IEEE Trans. Veh. Technol., Nov. 2013 file Published  2013-11 
15 [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 
14 [IEEE Trans. Veh. Technol.] Seungyoup Han, Seongwoo Ahn, Eunsung Oh, and Daesik Hong, "Effect of Channel Estimation Error on BER performance in Cooperative Transmission", IEEE Trans. Veh. Technol., May 2009 Published  2009-05 
» [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 
12 [IEEE Trans. Veh. Technol.] Myeongsu Han, Takki Yu, Jihyung Kim, Kyungchul Kwak, Sungeun Lee, Seungyoup Han and Daesik Hong, "OFDM Channel Estimation with Jammed Pilot Detector under Narrow-Band Jamming", IEEE Trans. Veh. Technol., May 2008 file Published  2008-05 
11 [IEICE Trans. Commun.] Jihyung Kim, Sangho Nam, Donjun Lee, Jonghan Kim, Jongdae Park, Daesik Hong, "Channel Estimation with a New Preamble Structure for a MIMO OFDM-based WLAN System", IEICE Trans. Commun., Feb. 2008 Published  2008-02 
10 [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 
9 [IEEE Signal Process. Lett.] Youngbo Cho, Sangmin Ro and Daesik Hong, "A New Channel Estimation Using Data-Dependent Pilot Symbols for MC-CDMA Systems With Chip Interleaving", IEEE SP Letters., Jun 2007 Published  2007-06 
8 [IEICE Trans. Commun.] Jihyung Kim and Daesik Hong, "Channel Estimation in Comb-Type Pilot Arrangements for OFDM Systems with Null Subcarriers", IEICE Trans. Comm., Dec 2006 Published  2006-12 
7 [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 
6 [IEEE Signal Process. Lett.] Youngbo Cho, Sangmin Ro, Hangyu Cho, Jaegu Lee and Daesik Hong, "A Novel Channel Estimation Method using Pilot Channel for Frequency Interleaved MC-CDMA Systems", IEEE SP Letters, Nov 2005 Published  2005-11 
5 [IEEE Signal Process. Lett.] Jihyung Kim, Jeongho Park and Daesik Hong, "Performance analysis of channel estimation in OFDM systems", IEEE SP Letters, Jan 2005 file Published  2005-01 
4 [Electron. Lett.] Hyunsoo Cheon and Daesik Hong, "Effect of imperfect channel information in OFDM-based WLAN", Electronics Letters, Aug 2002 Published  2002-08 
3 [IEEE Commun. Lett.] Hyunsoo Cheon and Daesik Hong, "Effect of Channel Estimation Error in OFDM-Based WLAN", IEEE Comm. Letters, May 2002 Published  2002-05 
2 [IEEE Trans. Neural Netw.] KyunByoung Ko, Sooyong Choi, Changeon Kang and Daesik Hong, "RBF Multiuser Detector With Channel Estimation Capability in a Synchronous MC-CDMA System", IEEE Trans. Neural Networks, Nov 2001 Published  2001-11 
1 [IEICE Trans. Commun.] Jaehee Cho, Namshin Cho, Keukjoon Bang, Myunghee Park, Heeyoung Jun, Hyuncheol Park and Daesik Hong, "Multistage Decision Feedback Channel Estimation for DS/CDMA Systems with M-Ary Orthogonal Modulation", IEICE Trans. Comm., Aug 2001 Published  2001-08