Interference Mitigation and Power Allocation Scheme for Downlink MIMO-NOMA HetNet

Ahmed Nasser, Osamu Muta, Maha Elsabrouty, Haris Gacanin

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)


In this paper, a novel interference mitigation and power allocation (PA) scheme is investigated for downlink non-orthogonal multiple access (NOMA) with multiple input multiple output (MIMO) technology in heterogeneous networks (HetNets). The proposed scheme, named PA based interference alignment and coordinated beamforming (PA-IA-CB), consists of two stages. The first stage applies two steps of IA-CB; one step for canceling the inter-cluster and the co-tier interference among small cells, whereas the other step deals with the inter-cluster interference within the macro cell. In the second stage, the cross-tier interference is proposed to be managed by properly handling the allocated power to the macro base station (MBS) and the small base stations (SBSs). The PA problem is modeled as a non-cooperative game between the MBS and the SBS with the aim of increasing the system sum rate. Simulation results verify the efficiency of the proposed technique in terms of total system sum rate and outage probability compared to the conventional schemes.

Original languageEnglish
Article number8719970
Pages (from-to)6805-6816
Number of pages12
JournalIEEE Transactions on Vehicular Technology
Issue number7
Publication statusPublished - Jul 2019

All Science Journal Classification (ASJC) codes

  • Automotive Engineering
  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Applied Mathematics


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