Precoding Optimization for NOMA UAV with Cellular Connections

Xiaowei Pang, Nan Zhao, Weile Zhang, Yunfei Chen, Jie Tang, Zhiguo Ding, Fumiyuki Adachi

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

1 Citation (Scopus)

Abstract

In this paper, we investigate the uplink transmission in a cellular network from a UAV and ground users to ground base stations (BSs). Specifically, we aim to maximize the sum rate of the uplink from the UAV to ground BSs in a specific idle frequency band as well as from the co-channel users to their associated BSs by optimizing precoding vectors at UAV. To mitigate the interference, we apply successive interference cancellation (SIC) not only to the BSs connected with UAV using non-orthogonal multiple access (NOMA) for transmission, but also to other BSs communicating with ground users in the same band. The precoding optimization problem with constraints on the SIC decoding and the uplink transmission rate is formulated, which is non-convex and intractable. Thus, we introduce auxiliary variables and apply first-order approximations based on Taylor expansion to convert it into a second-order cone programming. An iterative algorithm is proposed with low complexity to calculate the solution to the non-convex precoding optimization problem. Numerical results demonstrate the effectiveness of our proposed scheme.

Original languageEnglish
Title of host publication2019 IEEE 30th Annual International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538681107
DOIs
Publication statusPublished - 2019 Sep
Event30th IEEE Annual International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2019 - Istanbul, Turkey
Duration: 2019 Sep 82019 Sep 11

Publication series

NameIEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
Volume2019-September

Conference

Conference30th IEEE Annual International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2019
CountryTurkey
CityIstanbul
Period19/9/819/9/11

Keywords

  • NOMA
  • precoding optimization
  • successive interference cancellation
  • unmanned aerial vehicle

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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  • Cite this

    Pang, X., Zhao, N., Zhang, W., Chen, Y., Tang, J., Ding, Z., & Adachi, F. (2019). Precoding Optimization for NOMA UAV with Cellular Connections. In 2019 IEEE 30th Annual International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2019 [8904351] (IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC; Vol. 2019-September). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PIMRC.2019.8904351