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

8 Citations (Scopus)


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
Issue number5
Publication statusPublished - 2020 Oct

Bibliographical note

Funding Information:
Manuscript received October 12, 2020; approved for publication October 13, 2020. This paper is specially handled by EIC and Division Editor with the help of three anonymous reviewers in a fast manner. This work was supported by a grant-in-aid of HANWHA SYSTEMS. This paper was presented in part at the IEEE Conference on Standards for Communications and Networking, Granada, November, 2019. J.-H. Kwon and Y.-C. Ko are with the School of Electrical Engineering, Korea University, Seoul, South Korea, email: {hugokwon, koyc}@korea.ac.kr. J. Cho, B. Yu, S. Lee, and I. Jung are with the C4I R&D Center, Communication-EW Center, Hanwha Systems, Sungnam, South Korea, email: {jungil01.cho, byunggil77.yu, sungju1015.lee, inha.jung}@hanwha.com. C. Hwang is with the 2nd R&D Institute, Agency for Defense Development, Daejeon, South Korea, email: hwangchanho@add.re.kr Y.-C. Ko is the corresponding author. Digital Object Identifier: 10.1109/JCN.2020.000027

Publisher Copyright:
© 2011 KICS.


  • 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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