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 : 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. 
URL : https://ieeexplore.ieee.org/document/9410600 

.

List of Articles
No.
Statussort Date
» [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 Published  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