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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Journal ArticleDOI
Fair Energy-Efficient Resource Allocation for Downlink NOMA Heterogeneous Networks
TL;DR: Simulation results show that the proposed NOMA with optimal power allocation method using SCP and GA (NOMA-SCP-GA) achieves fair energy efficiency performance with lower complexity compared to the benchmark methods.
Posted Content
On Energy Harvesting of Hybrid TDMA-NOMA Systems
Haitham Al-Obiedollah,Kanapathippillai Cumanan,Alister G. Burr,Jie Tang,Yogachandran Rahulamathavan,Zhiguo Ding,Octavia A. Dobre +6 more
TL;DR: The performance of the proposed hybrid TDMA-NOMA design is demonstrated and it is shown that it outperforms the conventional TDMA scheme in terms of transmit power consumption.
Proceedings ArticleDOI
Resource Allocation Technique for Hybrid TDMA-NOMA System with Opportunistic Time Assignment
Xinchen Wei,Haitham Al-Obiedollah,Kanapathippillai Cumanan,Miao Zhang,Jie Tang,Wei Wang,Octavia A. Dobre +6 more
TL;DR: In this paper, a resource allocation technique for a hybrid time division multiple access (TDMA) NOMA system with opportunistic time assignment is proposed, where the available transmission time is divided into several time-slots.
Journal ArticleDOI
An Efficient Hybrid Transmission Method: Using Nonorthogonal Multiple Access and Multiuser Diversity
TL;DR: A hybrid switching strategy of NOMA and MUD (HSS-NM) by combining these two approaches in two-user and multiuser systems is considered to improve spectral efficiency and achieve a relatively high sum-rate gain.
Proceedings ArticleDOI
Recent Advances and Future Research Challenges in Non-Orthogonal Multiple Access for 5G Networks
Udara Srimath S. Samaratunge Arachchillage,Dushantha Nalin K. Jayakody,Sanjay Kumar Biswash,Rui Dinis +3 more
TL;DR: In this paper, the authors summarized the existing literature in resource allocation, performance analysis, principal features related to NOMA, and various types of NOMAs techniques are discussed.
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