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Non-Orthogonal Multiple Access (NOMA) for cellular future radio access
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Considering the trend in 5G, achieving significant gains in capacity and system throughput performance is a high priority requirement in view of the recent exponential increase in the volume of mobile traffic and the proposed system should be able to support enhanced delay-sensitive high-volume services.Abstract:
Radio access technologies for cellular mobile communications are typically characterized by multiple access schemes, e.g., frequency division multiple access (FDMA), time division multiple access (TDMA), code division multiple access (CDMA), and OFDMA. In the 4th generation (4G) mobile communication systems such as Long-Term Evolution (LTE) (Au et al., Uplink contention based SCMA for 5G radio access. Globecom Workshops (GC Wkshps), 2014. doi:10.1109/GLOCOMW.2014.7063547) and LTE-Advanced (Baracca et al., IEEE Trans. Commun., 2011. doi:10.1109/TCOMM.2011.121410.090252; Barry et al., Digital Communication, Kluwer, Dordrecht, 2004), standardized by the 3rd Generation Partnership Project (3GPP), orthogonal multiple access based on OFDMA or single carrier (SC)-FDMA is adopted. Orthogonal multiple access was a reasonable choice for achieving good system-level throughput performance with simple single-user detection. However, considering the trend in 5G, achieving significant gains in capacity and system throughput performance is a high priority requirement in view of the recent exponential increase in the volume of mobile traffic. In addition the proposed system should be able to support enhanced delay-sensitive high-volume services such as video streaming and cloud computing. Another high-level target of 5G is reduced cost, higher energy efficiency and robustness against emergencies.read more
Citations
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A Survey of In-Band Full-Duplex Transmission: From the Perspective of PHY and MAC Layers
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A General MIMO Framework for NOMA Downlink and Uplink Transmission Based on Signal Alignment
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References
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Journal ArticleDOI
User Association and Resource Allocation in Unified NOMA Enabled Heterogeneous Ultra Dense Networks
TL;DR: The application of NOMA techniques in HUDNs to support massive connectivity in 5G systems is investigated, with particular focus on user association and resource allocation.
Journal ArticleDOI
NOMA-Aided Cell-Free Massive MIMO Systems
TL;DR: The achievable sum rate of NOMA can be lower than that of OMA even in the regime of low number of users due to intra-cluster pilot contamination and error propagation of imperfect SIC.
Journal ArticleDOI
Non-Orthogonal Multiple Access: A Unified Perspective
TL;DR: A unified framework for NOMA is provided and the current understanding of the N OMA principle is generalized from the conventional code and power domains to the spatial domain as well as to their hybrids and to the networking domain.
Journal ArticleDOI
Design and Analysis of SCMA Codebook Based on Star-QAM Signaling Constellations
TL;DR: The simulation and analytical results show that the presented SCMA codebook outperforms the existing codebooks and low-density signature, and the proposed design is more efficient for the SCMA Codebook with large size and/or high dimension.
Proceedings ArticleDOI
Energy efficiency optimization for fading MIMO non-orthogonal multiple access systems
TL;DR: Numerical results show that the proposed NOMA schemes significantly outperform the traditional orthogonal multiple access scheme with open loop MIMO transmission in terms of both SE and EE.