OFDM Multiple Antennas Cognitive Radio Relay Synchronization CDMA Channel Estimation Spectrum Sharing Interference Cancellation Full duplex Spectrum Sensing Neural Networks Resource Allocation Stochastic Geometry Equalizer Bi-Directional Feedback Femtocell Heterogeneous Networks Energy Harvesting Device-to-Device (D2D) Cell Search Spectral efficiency NOMA FBMC interference management Dynamic TDD Cross-link interference SINR mismatch problem HetNet Idle cells Ultra-dense small cell networks achievable sum rate outage probability multi-spectral full-duplex relay selection diversity bursty traffic model mode selection Handoff CP-OFDM non-orthogonal multiple access self-interference cancellation Singular Vale Decomposition interference mitigation full-duplex cellular interference coordination Cognitive relay networks Time spreading beamforming Link adaptation Heterogeneous channel estimation capability coexistence MU-MIMO full-spreading NOMA GFDM Bi-directional full-duplex OQAM sensing duration Correlated MIMO Simultaneous Sensing and Transmission transmission capacity (TC) Two-way communications in-band full-duplex system automatic repeat request (ARQ) UWB flexible duplex TS-W-OFDM Windowing time-frequency efficiency eigen decomposition pilot signal 5G networks prototype filter Aggregate interference Long Term Evolution-Advanced interference to noise ratio resource size control link reliability mixed numerology Vehicle-to-vehicle communication LTE-based V2V Coexistence scenarios Resource management Filtered OFDM Cooperative systems Complexity tabu-search Deep learning Reliability Vehicle-to-Vehicle C-V2V HST Mobility Preamble 5G Grant-free Transmission Asynchronous Transmission Railway MLP massive connectivity
Status : Accepted 
Date : 2021-04 
Title : Exploiting Intentional Time-domain Offset in Downlink Multicarrier NOMA systems 
Authors : Hakkeon Lee, Insik Jung, Jehyun Heo, and Daesik Hong 
Journal : IEEE Wireless Communications Letters 
Abstract : This letter proposes a novel time-asynchronous non-orthogonal multiple access (TA-NOMA) in downlink multicarrier systems. TA-NOMA applies an intentional time offset to control interference between multi-users and to improve spectral efficiency. We first propose a transceiver design for TA-NOMA, and analyze a novel type of interference caused by the intentional time offset. Based on the analysis, a singular value decomposition (SVD)-based pre-processing scheme is proposed. Numerical results show that the proposed TA-NOMA with pre-processing has a superior spectral efficiency compared with conventional power-domain NOMA. Another remarkable feature is that TA-NOMA does not require any user pairing. 

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List of Articles
No.
Status Datesort
» [IEEE Wireless Commun. Lett.] Hakkeon Lee, Insik Jung, Jehyun Heo, and Daesik Hong, "Exploiting Intentional Time-domain Offset in Downlink Multicarrier NOMA systems", IEEE Wireless Communications Letters, Apr. 2021 file Accepted  2021-04 
3 [IEEE Wireless Commun. Lett.] Beomju Kim, Yosub Park, and Daesik Hong, "Partial Non-Orthogonal Multiple Access (P-NOMA)", IEEE Wireless Communications Letters, May 2019 Published  2019-05 
2 [IEEE Wireless Commun. Lett.] Hyejin Kim, Insik Jung, Yosub Park, Wonsuk Chung, Sooyong Choi, and Daesik Hong, "Time Spread-Windowed OFDM for Spectral Efficiency Improvement", IEEE Wireless Comm. Letters, Feb. 2018 Published  2018-02 
1 [IEEE Wireless Commun. Lett.] Jihaeng Heo, Gosan Noh, Sungsoo Park, Sungmook Lim and Daesik Hong, "Mobile TV White Space with Multi-Region based Mobility Procedure", IEEE Wireless Comm. Letters, Dec. 2012 file Published  2012-12