Proceedings ArticleDOI
Reduction of inter-cell interference in asynchronous multi-cellular VLC by using OFDMA-based cell partitioning
Sun-Young Jung,Do Hoon Kwon,Se-Hoon Yang,Sang-Kook Han +3 more
- pp 1-4
TLDR
By using the proposed method, inter-cell interference in asynchronous multi-cellular VLC could be effectively mitigated with only trivial frequency guard.Abstract:
Inter-cell interference hinders multi-cellular transmission in visible light communication (VLC). We proposed a subcarrier allocation-based cell partitioning to avoid co-channel interference without a large frequency guard and additional RF components. In asynchronous environment, the interference remains due to a timing offset between cells even in the subcarrier allocation-based cell partitioning. To mitigate the remaining interference, we employed cyclic prefix (CP) extension and filter bank based multicarrier (FBMC), which could improve performance and it was experimentally demonstrated in this paper. By using the proposed method, inter-cell interference in asynchronous multi-cellular VLC could be effectively mitigated with only trivial frequency guard.read more
Citations
More filters
Journal ArticleDOI
Coordinated Beamforming for Downlink Visible Light Communication Networks
TL;DR: A coordinated beamforming (CB) scheme is proposed for downlink interference mitigation among the coexisting VLC attocells utilizing multi-luminaire transmitters and the weighted sum mean square error (WSMSE) is adopted as the performance metric to take into consideration interference, noise, and fairness among users in system optimization.
Journal ArticleDOI
Enhanced Performance of Asynchronous Multi-Cell VLC System Using OQAM/OFDM-NOMA
TL;DR: For the user fairness and robustness against asynchronous time-offset, the proposed OQAM/OFDM-NOMA modulation can significantly outperform the conventional OFDM- nomA modulation in the multi-user asynchronous multi-cell VLC system.
Journal ArticleDOI
Rate-Splitting Multiple Access: Unifying NOMA and SDMA in MISO VLC Channels
Shimaa Naser,Paschalis C. Sofotasios,Lina Bariah,Wael Jaafar,Sami Muhaidat,Mahmoud Al-Qutayri,Octavia A. Dobre +6 more
TL;DR: In this article, rate-splitting multiple access (RSMA) has been proposed for VLC networks and its capabilities and potentials in VLC systems have been discussed, along with technical challenges, open issues, and research directions.
Posted Content
Rate-Splitting Multiple Access: Unifying NOMA and SDMA in MISO VLC Channels
Shimaa Naser,Lina Bariah,Wael Jaafar,Sami Muhaidat,Paschalis C. Sofotasios,Mahmoud Al-Qutayri,Octavia A. Dobre +6 more
TL;DR: In this paper, rate-splitting multiple access (RSMA) has been proposed for VLC systems and its potentials in VLC networks are discussed, as well as the challenges, open issues, and research directions.
Journal ArticleDOI
Downlink Interference Management in Cell-Free VLC Network
TL;DR: This work investigates the joint optimization of AP grouping, AP-user association and AP power allocation for interference management (IM) in the cell-free VLC network, which is formulated as a network utility maximization (NUM) problem.
References
More filters
Book
4G: LTE/LTE-Advanced for Mobile Broadband
TL;DR: In this article, the authors focus on LTE with full updates including LTE-Advanced to provide a complete picture of the LTE system, including the physical layer, access procedures, broadcast, relaying, spectrum and RF characteristics, and system performance.
Journal ArticleDOI
Mitigation of Inter-Cell Interference Utilizing Carrier Allocation in Visible Light Communication System
TL;DR: A carrier allocation-visible light communication system, adopting various carriers among the system's respective cells, is suggested in order to mitigate inter-cell interference.
Journal ArticleDOI
Mitigation of timing offset effect in IM/DD based OFDMA-PON uplink multiple access
TL;DR: The performance degradation according to timing offset between ONUs is experimentally analyzed and timing offset effect reduction in asynchronous multiple access is proposed and demonstrated by using CP extension and filter bank based multicarrier system in intensity modulation/direct detection based OFDMA-PON uplink transmission.
Journal ArticleDOI
Single side-band orthogonal frequency division multiplexing signal transmission in RF carrier allocated visible light communication
TL;DR: In this article, the authors proposed a single sideband (SSB) orthogonal frequency division multiplexing (OFDM) signal transmission with bit and power loading, which improves spectral efficiency to modulate multiple signals.