Spectral and energy efficient power allocation for MIMO broadcast channels with individual delay and QoS constraints

Jae Hong Kwon, Jungil Cho, Byunggil Yu, Seongju Lee, Inha Jung, Chanho Hwang, Young Chai Ko

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, we propose a novel power allocation algorithm to maximize the spectral efficiency (SE) and energy efficiency (EE) of multiple-input multiple-output (MIMO) broadcast channels under individual quality of service (QoS) constraints. In several wireless applications, one of the most important factors for QoS guarantee is delay outage. To address the impact of delay outage occurring in the link layer, effective capacity (EC) that means the maximum constant arrival rate satisfying statistical delay-QoS constraint is considered. Using a novel performance metric, effective-EE, which is defined as EC divided by total power consumption, we formulate an EC and effective-EE maximization problem with QoS constraints as an adaptive power allocation problem. By applying Lagrangian method, we solve optimization problem and propose an optimal power allocation algorithm. Simulation results demonstrate that our proposed algorithm can improve the EC and effective-EE performance.

Original languageEnglish
Article number9261242
Pages (from-to)390-398
Number of pages9
JournalJournal of Communications and Networks
Volume22
Issue number5
DOIs
Publication statusPublished - 2020 Oct

Keywords

  • Delay outage
  • MIMO broadcast channels
  • effective capacity
  • energy efficiency
  • power allocation
  • quality of service

ASJC Scopus subject areas

  • Information Systems
  • Computer Networks and Communications

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