Energy Efficiency Maximization in NOMA Enabled Backscatter Communications with QoS Guarantee

Yongjun Xu, Zhijin Qin, Guan Gui, Haris Gacanin, Hikmet Sari, Fumiyuki Adachi

Research output: Contribution to journalArticlepeer-review

57 Citations (Scopus)


Energy efficiency (EE) is an important performance metric in communication systems. However, to the best of our knowledge, the energy-efficient resource allocation (RA) problem in non-orthogonal multiple access enabled backscatter communication networks (NOMA-BackComNet) comprehensively considering the user's quality of service (QoS) has not been investigated. In this letter, we present the first attempt to solve the EE-based RA problem for NOMA-BackComNet with QoS guarantee. The objective is to maximize the EE of users subject to the QoS requirements of users, the decoding order of successive interference cancellation and the reflection coefficient (RC) constraint, where the transmit power of the base station and the RC of the backscatter device are jointly optimized. To solve this non-convex problem, we develop a novel iteration algorithm by using Dinkelbach's method and the quadratic transformation approach. Simulation results verify the effectiveness of the proposed scheme in improving the EE by comparing it with the other schemes.

Original languageEnglish
Article number9223730
Pages (from-to)353-357
Number of pages5
JournalIEEE Wireless Communications Letters
Issue number2
Publication statusPublished - 2021 Feb


  • Backscatter communications
  • energy efficiency
  • non-orthogonal multiple access


Dive into the research topics of 'Energy Efficiency Maximization in NOMA Enabled Backscatter Communications with QoS Guarantee'. Together they form a unique fingerprint.

Cite this