OFDM Multiple Antennas Cognitive Radio Relay CDMA Synchronization Channel Estimation Spectrum Sharing Interference Cancellation Full duplex Spectrum Sensing Resource Allocation Neural Networks Stochastic Geometry Equalizer Bi-Directional Feedback Femtocell Energy Harvesting Heterogeneous Networks Device-to-Device (D2D) Cross-link interference Cell Search SINR mismatch problem Ultra-dense small cell networks HetNet Idle cells Spectral efficiency Dynamic TDD interference management NOMA FBMC selection diversity Handoff outage probability mode selection B5G multi-spectral achievable sum rate Grant-free Transmission Filtered OFDM tabu-search bursty traffic model flexible duplex 5G Asynchronous Transmission Preamble Deep learning Shortened TTI automatic repeat request (ARQ) Two-way communications transmission capacity (TC) in-band full-duplex system self-interference cancellation Complexity Ultra-dense small cell sensing duration Correlated MIMO Cognitive relay networks Heterogeneous channel estimation capability Bi-directional full-duplex full-duplex cellular full-duplex relay Simultaneous Sensing and Transmission UWB OQAM Windowing Vehicle-to-vehicle communication prototype filter pilot signal LTE-based V2V link reliability resource size control interference to noise ratio eigen decomposition TS-W-OFDM C-V2V massive connectivity Reliability Vehicle-to-Vehicle full-spreading NOMA Resource management Cooperative systems Coexistence scenarios mixed numerology 6G Cell-free Coexisting network Multiple access Railway CP-OFDM MLP Edge computing Full-duplex Mobility non-orthogonal multiple access HST interference mitigation Computation offloading TDD configuration Singular Vale Decomposition
Status : Published 
Date : 2010-02 
Title : The Role of Phase Compensation in Preventing Channel Dispersion in Variable Gain Relay OFDM Systems 
Authors : Kyungchul Kwak, Sungeun Lee, and Daesik Hong 
Journal : IEEE Transactions on Vehicular Technology 
Abstract : We show that the length of a composite channel is regarded up to the whole symbol duration for variable-gain relay (VGR), which generates the received power constant instantaneously. The enlarged channel length causes system burden, which is due to long-channel estimation, i.e., an increase in pilot overhead, a decrease in bandwidth efficiency, and a degradation of system performance. To prevent this effect and minimize the length of the composite channel, phase compensation of the source-relay (S-R) link channel should be added to the VGR, although this addition increases complexity. A system that adopts VGR with phase compensation performs better and has higher bandwidth efficiency. 
URL : http://ieeexplore.ieee.org/xpls/abs_all....er=5415853 
Download : http://mirinae.yonsei.ac.kr/?module=file...fe200a26f9 

Kyungchul Kwak; Sungeun Lee; Daesik Hong; , "The Role of Phase Compensation in Preventing Channel Dispersion in Variable-Gain Relay OFDM Systems," Vehicular Technology, IEEE Transactions on , vol.59, no.2, pp.1005-1011, Feb. 2010
doi: 10.1109/TVT.2009.2035045
URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=5415853&isnumber=5415848

List of Articles
No.
Statussort Date
4 [IEEE Trans. Veh. Technol.] Taehoon Kwon, Youngju Kim, and Daesik Hong, "Comparison of FDR and HDR under Adaptive Modulation with Finite Length Queues" IEEE Trans. Veh. Technol., Feb 2012 file Published  2012-02 
3 [IEEE Trans. Veh. Technol.] Taehoon Kwon, Sungmook Lim, Sooyong Choi, and Daesik Hong,"Optimal Duplex Mode for DF Relay in Terms of Outage Probability," IEEE Trans. Veh. Technol., Sept. 2010 file Published  2010-09 
» [IEEE Trans. Veh. Technol.] Kyungchul Kwak, Sungeun Lee, and Daesik Hong, "The Role of Phase Compensation in Preventing Channel Dispersion in Variable Gain Relay OFDM Systems," IEEE Trans. Veh. Technol., Feb 2010 file Published  2010-02 
1 [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