On the Feasibility of Interference Alignment in Compounded MIMO Broadcast Channels With Antenna Correlation and Mixed User Classes

Galymzhan Nauryzbayev, Emad Alsusa, Mohamed Abdallah

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

This paper presents a generalized closed-form beamforming technique that can achieve the maximum degrees of freedom in compounded multiple-input multiple-output (MIMO) broadcast channels with mixed classes of multiple-antenna users. The contribution is first described within the context of a three-cell network and later extended to the general multicell scenario where we also show how to determine the conditions required to align the interference in a subspace that is orthogonal to the one reserved for the desired signals. This is then followed by an analysis of the impact of antenna correlation for different channel state information acquisition models. The proposed scheme is examined under both conventional and large-scale MIMO systems. It will be shown that the proposed technique enables networks with any combination of user classes to achieve superior performance even under significant antenna correlation, particularly in the case of the large-scale MIMO systems.
Original languageEnglish
Pages (from-to)2130 - 2140
Number of pages11
JournalIEEE Transactions on Vehicular Technology
Volume67
Issue number3
DOIs
Publication statusPublished - Oct 18 2017

Keywords

  • Antenna correlation
  • broadcast channel (BC)
  • channel state information (CSI)
  • degree of freedom (DoF)
  • Interference alignment (IA)
  • Multiple-input multiple-output (MIMO)

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