JOURNAL BROWSE
Search
Advanced SearchSearch Tips
Non-Orthogonal Multiple Access (NOMA) to Enhance Capacity in 5G
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
  • Journal title : International Journal of Contents
  • Volume 11, Issue 4,  2015, pp.38-43
  • Publisher : The Korea Contents Association
  • DOI : 10.5392/IJoC.2015.11.4.038
 Title & Authors
Non-Orthogonal Multiple Access (NOMA) to Enhance Capacity in 5G
Lim, Sungmook; Ko, Kyunbyoung;
  PDF(new window)
 Abstract
Non-orthogonal multiple access (NOMA) where all users share the entire time and frequency resource has paid attention as one of the key technologies to enhance the spectral efficiency and the total throughput. Nevertheless, as the number of users and SIC error increase, the inter-user interference and the residual interference due to the SIC error also increase, resulting in performance degradation. In order to mitigate the performance degradation, we propose grouping-based NOMA system. In the proposed scheme, all users are divided into two groups based on the distance between the BS and each user, where one utilizes the first half of the bandwidth and the other utilizes the rest in the orthogonal manner. On the other hand, users in each group share the spectrum in the non-orthogonal manner. Grouping users can reduce both the inter-user interference and residual interference due to the SIC error, so it can outperform conventional NOMA system, especially in case that the number of users and the SIC error increase. Based on that, we also present the hybrid operation of the conventional and the proposed NOMA systems. In numerical results, the total throughput of the proposed NOMA systems is compared with that of the conventional NOMA systems with regard to the number of users and SIC error. It is confirmed that the proposed NOMA system outperforms the conventional NOMA system as the number of users and the SIC error increase.
 Keywords
Non-orthogonal Multiple Access (NOMA);Power Allocation;Successive Interference Cancellation (SIC);Sum rate;
 Language
English
 Cited by
 References
1.
R. Andrew, “2020: The Ubiquitous Heterogeneous Network Beyond 4G,” ITU Kaleidoscope, 2011.

2.
Qualcomm Incorporated, “The 1000x Data Challenge,” June 2013. Available website: http://www.qualcomm.com/1000x/

3.
RWS-120052, “Report of 3GPP RAN Workshop on Release 12 and Onwards,” 3GPP Workshop on Release 12 Onwards, Ljubljana, Slovenia, June 11-12, 2012.

4.
NTT DoCoMo, “Requirements, candidate solutions & technology roadmap for LTE12 onward,” 3GPP Workshop on Rel. 12 and onwards, Ljubljana, Slovenia, June 11-12, 2012.

5.
Sharp corporation, “Evolving RAN Towards Rel-12 and Beyond,” RWS-120039, 3GPP RAN Workshop on Release 12 Onward, Ljublijana, Slovenia, 11-12 June, 2012.

6.
Marie-Rita Hojeij, J. Farch, C. A. Nour, and C. Douillard, “Resource Allocation in Downlink Non-orthogonal Multiple Access (NOMA) for Future Radio Access,” Proc. IEEE Vehicular Technology Conference (VTC)-spring, May 2015.

7.
K. Higuchi, Y-C. Wu, and S. Aissa, “Non-orthogonal Opportunistic Beamforming: Performance Analysis and Implementation,” IEEE Transactions on Wireless Communications, vol. 11, no. 4, 2012, pp. 1424-1433. crossref(new window)

8.
Y. Hayashi, Y. Kishiyama, and K. Higuchi, “Investigations on Power Allocation Among Beams in Nonorthogonal Access with Random Beamforming ad Intra-beam SIC for Cellular MIMO Downlink,” Proc. IEEE VTC-fall, Sep. 2013.

9.
B. Kim, S. Lim, H. Kim, S. Suh, J. Kwun, S. Choi, C. Lee, S. Lee, and D. Hong, “Non-orthogonal Multiple Access for Multiuser Downlink Beamforming System,” Proc. IEEE Military Communications Conference (MILCOM), Nov. 2013.

10.
S. Tomida and K. Higuchi, “Non-orthogonal Access with SIC in Cellular Downlink for User Fairness Enhancement,” Proc. International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS), Dec. 2011.

11.
Y. Saito, A. Benjennour, Y. Kishiyama, and T. Nakamura, “Evaluation of Downlink System-level Performance for Non-Orthogonal Multiple Access (NOMA),” IEICE Technical Report, RC 2012-325.

12.
N. Otao, Y. Kishiyama, and K. Higuchi, “Performance of Non-orthogonal Access with SIC in Cellular Downlink Using Proportional Fair-based Resource Allocation,” Proc. IEEE ISWC, 2012.

13.
A. Benjebbour, Y. Saito, Y. Kishiyama, A. Li, A. Harada, and T. Nakamura, “Concept and Practical Considrations of Non-orthogonal Multiple Access (NOMA) for Future Radio Access,” Proc. IEEE ISPACS, Nov. 2013.

14.
D. Tse, P. Viswanath, Fundamentals of Wireless Communication, Cambridge University Press, 2005.