Capacity Analysis of Non-Orthogonal Multiple Access for Uplink and Downlink
Non-orthogonal multiple access (NOMA) is intended to be used for the next generation 5G cellular networks. In this paper, the expressions for the channel capacities for symmetric and asymmetric NOMA networks have been analysed. The performance measure of user spectral efficiency and the sum-rate bounds, for the NOMA and the existing orthogonal multiple access (OMA) networks have been compared. Furthermore, analysis of user rate and capacity of NOMA network has been carried out and it is observed that the NOMA capacity region varies as a function of the power allocation factor. The corresponding models have been developed for both uplink and downlink, and simulated with MATLAB. The NOMA performance with imperfect Successive Interference Cancellation (SIC) decoding is also analysed for the downlink. It is also verified that the transmit power may be increased to counter the spectral efficiency reduction due to imperfect SIC.
“Internet of Things forecast,” Ericsson, 2019. [Online]. Available: https://www.ericsson.com/en/mobility-report/internet-of-things-forecast.
Rachid El Hattachi; Javan Erfanian, “NGMN 5G White Paper,” NGMN, 2015.
E. Mohyeldin, “Minimum Technical Performance Requirements for IMT-2020 Radio Interface(s),” NOKIA, 2017.
S. Kumar, Wireless Communication: The Fundamental & Advanced Concepts, River Publishers, Denmark , 2015.
M. Aldababsa, M. Toka, S. Gokceli, G. K. Kurt and O. Kucur, “A tutorial on Nonorthogonal Multiple Access for 5G and Beyond,” Wireless Communications and Mobile Computing, vol. 2018, pp. 1–24, 2018.
M. Vaezi, Z. Ding and H. V. Poor, Eds., Multiple Access Techniques for 5G Wireless Networks and Beyond, Springer , 2019.
K. Huguchi and Anas Benjebbour, “Non-orthogonal Multiple Access (NOMA) with Successive Interference Cancellation for Future Radio Access,” IEICE Transactions on Communication, Vols. E-98, no. 3, 2015.
Q. C. Li, H. Niu, A. Papathanassiou and G. Wu, “5G network capacity: Key elements and technologies,” IEEE Vehicular Technology, vol. 9, no. 1, pp. 71–78, 2014.
L. Dai, B. Wang, Y. Yuan, S. Han, C.-L. I and Z. Wang, “Non-orthogonal multiple access for 5G: solutions, challenges, opportunities, and future research trends,” IEEE Communications, vol. 53, no. 9, pp. 74–81, 2015.
S. M. R. Islam, N. Avazov, O. A. Dobre and K.-S. Kwak, “Power-Domain Non-Orthogonal Multiple Access (NOMA) in 5G Systems: Potentials and Challenges,” IEEE Communication Surveys and Tutorials, vol. 19, no. 2, pp. 721–741, 2017.
D. Tse and P. Viswanath, Fundamentals of Wireless Communications, Cambridge University Press, 2005.
R. C. Kizilirmak, “Non-Orthogonal Multiple Access (NOMA) for 5G Networks,” in Towards 5G Wireless Networks: A physical layer perspective, Intech Open, 2016, pp. 83–98.
C. Xiong, G. Li, S. Zhang, Y. Chen and S. Xu, “Energy and Spectral Efficiency Tradeoff in Downlink OFDMA networks,” IEEE Transactions on Wireless Communications, vol. 10, no. 11, pp. 3874–3886, 2011.
M. Vaezi, R. Schober, Z. Ding and H. Poor, “Non-orthogonal Multiple Access: Common Myths and Critical Questions,” IEEE Wireless Communications, vol. 26, no. 5, pp. 174–180, 2019.