Improved Water-Filling Power Allocation for Energy-Efficient Massive MIMO Downlink Transmissions

M. K. Noor Shahida, Rosdiadee Nordin, Mahamod Ismail

Research output: Contribution to journalArticle

Abstract

Energy Efficiency (EE) is becoming increasingly important for wireless communications and has caught more attention due to steadily rising energy costs and environmental concerns. Recently, a new network architecture known as Massive Multiple-Input Multiple-Output (MIMO) has been proposed with the remarkable potential to achieve huge gains in EE with simple linear processing. In this paper, a power allocation algorithm is proposed for EE to achieve the optimal EE in Massive MIMO. Based on the simplified expression, we develop a new algorithm to compute the optimal power allocation algorithm and it has been compared with the existing scheme from the previous literature. An improved water filling algorithm is proposed and embedded in the power allocation algorithm to maximize EE and Spectral Efficiency (SE). The numerical analysis of the simulation results indicates an improvement of 40% in EE and 50% in SE at the downlink transmission, compared to the other existing schemes. Furthermore, the results revealed that SE does not influence the EE enhancement after using the proposed algorithm as the number of Massive MIMO antenna at the Base Station (BS) increases.

Original languageEnglish
Pages (from-to)79-84
Number of pages6
JournalInternational Journal of Electronics and Telecommunications
Volume63
Issue number1
DOIs
Publication statusPublished - 1 Mar 2017

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Energy efficiency
Water
Network architecture
Base stations
Numerical analysis
Antennas
Communication
Processing
Costs

Keywords

  • energy efficiency
  • Massive MIMO
  • power allocation
  • spectral efficiency

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

Cite this

Improved Water-Filling Power Allocation for Energy-Efficient Massive MIMO Downlink Transmissions. / Noor Shahida, M. K.; Nordin, Rosdiadee; Ismail, Mahamod.

In: International Journal of Electronics and Telecommunications, Vol. 63, No. 1, 01.03.2017, p. 79-84.

Research output: Contribution to journalArticle

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