Hybrid precoding using projection-aided block diagonalization for mmWave MU-MIMO systems

Minjung Cho, Hyukyeon Lee, Kyeongmook Oh, Jaeseok Kim

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

2 Citations (Scopus)

Abstract

For next generation wireless networks, hybrid precoding has overcome high path-loss issue in millimeter wave (mmWave) multi-user multiple-input multiple-output (MU-MIMO) communication system. In this paper, we propose a fully connected hybrid precoding scheme for downlink mmWave MU-MIMO systems. In the first step, we design the unconstrained fully digital precoder. To eliminate inter-user-interference (IUI), we use projection matrices on the users' null spaces with employing the information about the angle of departure (AoD). In the second step, we calculate the baseband precoder and radio frequency (RF) precoder through matrix decomposition (MD) of the unconstrained precoder. While the proposed algorithm reduces the dominant computational complexity by approximately 30%, the total sum rate of the simulation is close to 99% as compared with iterative matrix decomposition (IMD-) aided block-diagonalization (BD) algorithm. In addition, the proposed hybrid precoder shows a good performance in a multi-streams environment, and outperforms the traditional BD based scheme by the sum rate of approximately 50%.

Original languageEnglish
Title of host publication2019 14th IEEE Malaysia International Conference on Communication
Subtitle of host publicationEmerging Technologies in IoE and 5G, MICC 2019
EditorsGan Kok Beng, Norhana Arsad, Mohd Fais Mansor
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages91-95
Number of pages5
ISBN (Electronic)9781728147376
DOIs
Publication statusPublished - 2019 Dec
Event14th IEEE Malaysia International Conference on Communication, MICC 2019 - Selangor, Malaysia
Duration: 2019 Dec 22019 Dec 4

Publication series

Name2019 14th IEEE Malaysia International Conference on Communication: Emerging Technologies in IoE and 5G, MICC 2019

Conference

Conference14th IEEE Malaysia International Conference on Communication, MICC 2019
Country/TerritoryMalaysia
CitySelangor
Period19/12/219/12/4

Bibliographical note

Publisher Copyright:
© 2019 IEEE.

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Hardware and Architecture
  • Signal Processing
  • Atomic and Molecular Physics, and Optics

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