Spectrum Sensing 6G Full duplex Cognitive Radio OFDM Idle cells FBMC Energy Harvesting Ultra-dense small cell networks Bi-Directional stochastic geometry interference management Asynchronous Transmission SINR mismatch problem HetNet Dynamic TDD NOMA Cross-link interference Spectral efficiency bursty traffic model mode selection Device-to-Device (D2D) OQAM Channel estimation error multi-spectral Ultra-dense small cell Heterogeneous channel estimation capability synchronization Bi-directional full-duplex Preamble Intentional frequency offset (IFO) Asynchronism Shortened TTI Deep learning MLP Vehicle-to-vehicle communication Low Earth orbits (LEO) satellite Railway Simultaneous Sensing and Transmission full-duplex relay Cellular networks Latency selection diversity Cognitive relay networks MIMO K-S statistics Long Term Evolution-Advanced 5G networks interference coordination full-duplex cellular interference mitigation sensing duration Correlated MIMO outage probability transmission capacity (TC) Two-way communications self-interference cancellation in-band full-duplex system automatic repeat request (ARQ) achievable sum rate Coexisting network interference to noise ratio link reliability tabu-search massive connectivity resource size control Coexistence scenarios Resource management spectrum sharing mixed numerology Multiple input multiple output (MIMO) New radio non-terrestrial network (NR-NTN) full-spreading NOMA Intentional time offset LTE-based V2V CP-OFDM Singular Vale Decomposition non-orthogonal multiple access Non-orthogonal multiple access (NOMA) Complexity Cooperative systems Reliability B5G Multiple access Cell-free HST Mobility flexible duplex 5G Asynchronous non-orthogonal multiple access (NOMA) Edge computing Full-duplex Filtered OFDM Vehicle-to-Vehicle C-V2V Grant-free Transmission Sub-band filtering Computation offloading TDD configuration Degree of freedom (DoF) Satellite communication
Status : Published 
Date : 2019-10 
Title : Novel Transceiver Architecture for an Asynchronous Grant-Free IDMA System 
Authors : Soohyun Kim, Hyunsoo Kim, Hoondong Noh, Younsun Kim, and Daesik Hong 
Journal : IEEE Transactions on Wireless Communications 
Abstract : This paper investigates a grant-free non-orthogonal multiple access (NOMA) system where massive numbers of users wake up and send data right away without performing a grant-based initial access procedure. Since no scheduling grant is used in this system, the base station (BS) does not know which user is transmitting on each resource. Also, due to the lack of an uplink (UL) timing control process, multiple users’ signals are asynchronously received at the BS. This causes asynchronous interference, or multiuser inter-carrier and inter-symbol interference. We propose two ideas to address these two problems. We first propose an auxiliary preamble structure to successfully detect the user activity, even in the presence of a massive number of users. We then propose a modification to the interleavedivision multiple access (IDMA) receiver to mitigate asynchronous interference. Simulation results show that the proposed scheme significantly improves the preamble detection performance and BER performance compared to the conventional schemes. Furthermore, we show that the proposed grant-free NOMA system can achieve much better performance than the grant-based NOMA system in terms of transmission time and signaling overhead. 
URL : https://ieeexplore.ieee.org/document/8758401 

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List of Articles
No.
Statussort Date
15 [IEEE Trans. Wireless Commun.] Joohyun Son, Hakkeon Lee, Insik Jung, and Daesik Hong, "Exploiting Intentional Frequency Offset in NOMA-OFDM Systems: From Basic to Practical", IEEE Transactions on Wireless Communications, 2023 Published  2023-02 
14 [IEEE Trans. Wireless Commun.] Hakkeon Lee, Jaeyoung Choi, and Daesik Hong, "Resource Configuration for Full-duplex-aided Multiple-Access Edge Computation Offloading" in IEEE Transactions on Wireless Communications, September 2021 Published  2021-10 
13 [IEEE Trans. Wireless Commun.] Soohyun Kim, Jeeyeon Kim, and Daesik Hong, "A New Non-Orthogonal Transceiver for Asynchronous Grant-Free Transmission Systems," in IEEE Transactions on Wireless Communications, March 2021 Published  2020-11 
12 [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 
» [IEEE Trans. Wireless Commun.] S. Kim, H. Kim, H. Noh, Y. Kim and D. Hong, "Novel Transceiver Architecture for an Asynchronous Grant-Free IDMA System," in IEEE Transactions on Wireless Communications Published  2019-10 
10 [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 
9 [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 
8 [IEEE Trans. Wireless Commun.] Jintae Kim, Yosub Park, Sungwoo Weon, Jinkyo Jeong, Sooyong Choi, and Daesik Hong, "A New Filter-Bank Multicarrier System: The Linearly Processed FBMC System", IEEE Trans. on Wireless Comm., Apr. 2018 Published  2018-04 
7 [IEEE Trans. Wireless Commun.] Yosub Park, Jihaeng Heo, Wonsuk Chung, Sungwoo Weon, Sooyong Choi, and Daesik Hong, "A New Link Adaptation Method to Mitigate SINR Mismatch in Ultra-dense Small Cell LTE Networks", IEEE Trans. on Wireless Comm., Nov. 2017 Published  2017-11 
6 [IEEE Trans. Wireless Commun.] Kwonjong Lee, Yosub Park, Minsoo Na, Hanho Wang, and Daesik Hong, Aligned Reverse Frame Structure for Interference Mitigation in Dynamic TDD Systems", IEEE Trans. on Wireless Comm., Jul. 2017 Published  2017-07 
5 [IEEE Trans. Wireless Commun.] Wonsuk Chung, Chanhong Kim, Sooyong Choi, and Daesik Hong, "Synchronization Sequence Design for FBMC/OQAM Systems", IEEE Trans. on Wireless Comm., Aug. 2016 file Published  2016-08 
4 [IEEE Trans. Wireless Commun.] Jonghyun Bang, Jemin Lee, Member, Seokjung Kim, and Daesik Hong, "An Efficient Relay Selection Strategy for Random Cognitive Relay Networks" IEEE Trans. Wireless Commun., Nov. 2014 file Published  2014-11 
3 [IEEE Trans. Wireless Commun.] Wonsuk Chung, Sungsoo Park, Sungmook Lim, and Daesik Hong, "Spectrum Sensing Optimization for Energy-Harvesting Cognitive Radio Systems", IEEE Trans. on Wireless Comm., Jan. 2014 file Published  2014-01 
2 [IEEE Trans. Wireless Commun.] Jihaeng Heo, Hyungsik Ju, Sungsoo Park, Eunsun Kim, and Daesik Hong, "Simultaneous Sensing and Transmission in Cognitive Radio," IEEE Transactions on Wireless Communications, Jan. 2014 file Published  2014-01 
1 [IEEE Trans. Wireless Commun.] Sungsoo Park, and Daesik Hong, "Achievable Throughput of Energy Harvesting Cognitive Radio Networks," IEEE Trans. Wireless Commun., Feb. 2014 file Published  2014-02