Power-Domain Non-Orthogonal Multiple Access (NOMA) in 5G Systems: Potentials and Challenges
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In this paper, the authors comprehensively survey the recent progress of NOMA in 5G systems, reviewing the state-of-the-art capacity analysis, power allocation strategies, user fairness, and user-pairing schemes in NOMAs.Abstract:
Non-orthogonal multiple access (NOMA) is one of the promising radio access techniques for performance enhancement in next-generation cellular communications. Compared to orthogonal frequency division multiple access (OFDMA), which is a well-known high-capacity orthogonal multiple access (OMA) technique, NOMA offers a set of desirable benefits, including greater spectrum efficiency. There are different types of NOMA techniques, including power-domain and code-domain. This paper primarily focuses on power-domain NOMA that utilizes superposition coding (SC) at the transmitter and successive interference cancellation (SIC) at the receiver. Various researchers have demonstrated that NOMA can be used effectively to meet both network-level and user-experienced data rate requirements of fifth-generation (5G) technologies. From that perspective, this paper comprehensively surveys the recent progress of NOMA in 5G systems, reviewing the state-of-the-art capacity analysis, power allocation strategies, user fairness, and user-pairing schemes in NOMA. In addition, this paper discusses how NOMA performs when it is integrated with various proven wireless communications techniques, such as cooperative communications, multiple input multiple output (MIMO), beamforming, space time coding, and network coding, among others. Furthermore, this paper discusses several important issues on NOMA implementation and provides some avenues for future research.read more
Citations
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Proceedings ArticleDOI
Analysis of NOMA for Future Cellular Communication
TL;DR: In this paper, the authors focus on the energy efficient resource optimization for NOMA in 5G networks and elaborate studies on the current evolution of NOMAs in the 5G structure, scrutinizing on the cutting edge limit examination, control selection technique, client requirement, and client complementing scheme in NOMMs.
Journal ArticleDOI
Joint Power Allocation for NOMA-Based Diamond Relay Networks With and Without Cooperation
TL;DR: A new protocol for NDR networks based on cooperative communications is introduced and the associated joint power-allocation problem is examined and it is shown that this cooperative NDR (C-NDR) network further improves the achievable rate in some typical placements of the relays.
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An Interference Alignment and ICA-Based Semiblind Dual-User Downlink NOMA System for High-Reliability Low-Latency IoT
TL;DR: The proposed IA-ICA-based semiblind NOMA system demonstrates a much better SER performance than the existing approaches even though they are under perfect CSI, and is a feasible solution for HRLL IoT, with high reliability and very low spectral and signaling overheads.
Proceedings ArticleDOI
Bit Error Rate Analysis of Non-Orthogonal Multiple Access (NOMA) Technique in 5G with Different Power and User Scenarios
TL;DR: The performance and challenges of NOMA with various power allocation ratios and a different number of users, comparatively are discussed.
Journal ArticleDOI
Joint evaluation of imperfect SIC and fixed power allocation scheme for wireless powered D2D-NOMA networks with multiple antennas at base station
Chi-Bao Le,Dinh-Thuan Do +1 more
TL;DR: In this study, device-to-device (D2D) communication is exploited to adopt the proximity transmission among two nearby devices and the ergodic capacity of D2D NOMA is further analyzed under both perfect and imperfect SIC.
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