Joint beamforming design and power allocation for full-duplex NOMA cognitive relay systems

Mohammadali Mohammadi, Batu K. Chalise, Azar Hakimi, Himal A. Suraweera, Zhiguo Ding

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

15 Citations (Scopus)

Abstract

In this paper, we consider a non-orthogonal multiple access cognitive radio network, where a full-duplex multi-antenna relay assists transmission from a base station (BS) to a cognitive far user, whereas, at the same time, the BS transmits to a cognitive near user. Our objective is to enlarge the far-near user rate region by maximizing the rate of the near user under a constraint that the rate of the far user is above a certain threshold. To this end, a non- convex joint optimization problem of relay beamforming and the transmit powers at the BS and cognitive relay is solved as a semi-definite relaxation problem, in conjunction with an efficiently solvable line-search approach. For comparisons, we also consider low complexity fixed beamformer design, where the optimum power allocation between the BS and cognitive relay is solved. Our results demonstrate that the proposed joint optimization can significantly reduce the impact of the residual self-interference at the FD relay and inter-user interference in the near user case.

Original languageEnglish
Title of host publication2017 IEEE Global Communication Conference (GLOBECOM): proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages6
ISBN (Electronic)9781509050192
ISBN (Print)9781509050208
DOIs
Publication statusPublished - 15 Jan 2018
Externally publishedYes
EventIEEE Global Communications Conference 2017 - Singapore, Singapore
Duration: 04 Dec 201708 Dec 2017
http://globecom2017.ieee-globecom.org/about

Publication series

Name IEEE Global Communications Conference (GLOBECOM): Proceedings

Conference

ConferenceIEEE Global Communications Conference 2017
Abbreviated titleGLOBECOM 2017
Country/TerritorySingapore
CitySingapore
Period04/12/201708/12/2017
Internet address

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Hardware and Architecture
  • Safety, Risk, Reliability and Quality

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