Non-orthogonal multiple access in a downlink multiuser beamforming system

Beomju Kimy, Sungmook Lim, Hyungjong Kim, Sangwook Suh, Jonghyung Kwun, Sooyong Choi, Chungyong Lee, Sanghoon Lee, Daesik Hong

Research output: Chapter in Book/Report/Conference proceedingConference contribution

198 Citations (Scopus)

Abstract

In this paper, we propose a non-orthogonal multiple access-based multiuser beamforming (NOMA-BF) system designed to enhance the sum capacity. In the proposed NOMA-BF system, a single BF vector is shared by two users, so that the number of supportable users can be increased. However, sharing a BF vector leads to interference from other beams as well as from the other user sharing the BF vector. Therefore, to reduce interference and improve the sum capacity, we additionally propose a clustering and power allocation algorithm. This clustering algorithm, which selects two users with high correlation and a large gain-difference between their channels, can reduce the interference from other beams and from the other user as well. Furthermore, power allocation ensures that each user's transmit power is allocated so as to maximize the sum capacity. Numerical results verify that the proposed NOMA-BF system improves the sum capacity, compared to the conventional multiuser BF system.

Original languageEnglish
Title of host publicationProceedings - 2013 IEEE Military Communications Conference, MILCOM 2013
Pages1278-1283
Number of pages6
DOIs
Publication statusPublished - 2013 Dec 1
Event2013 IEEE Military Communications Conference, MILCOM 2013 - San Diego, CA, United States
Duration: 2013 Nov 182013 Nov 20

Publication series

NameProceedings - IEEE Military Communications Conference MILCOM

Other

Other2013 IEEE Military Communications Conference, MILCOM 2013
CountryUnited States
CitySan Diego, CA
Period13/11/1813/11/20

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All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

Kimy, B., Lim, S., Kim, H., Suh, S., Kwun, J., Choi, S., Lee, C., Lee, S., & Hong, D. (2013). Non-orthogonal multiple access in a downlink multiuser beamforming system. In Proceedings - 2013 IEEE Military Communications Conference, MILCOM 2013 (pp. 1278-1283). [6735800] (Proceedings - IEEE Military Communications Conference MILCOM). https://doi.org/10.1109/MILCOM.2013.218