Generative Neural Network Channel Modeling for Millimeter-Wave UAV Communication

William Xia, Sundeep Rangan, Marco Mezzavilla, Angel Lozano, Giovanni Geraci, Vasilii Semkin, Giuseppe Loianno

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

The millimeter wave bands are being increasingly considered for wireless communication to unmanned aerial vehicles (UAVs). Critical to this undertaking are statistical channel models that describe the distribution of constituent parameters in scenarios of interest. This paper presents a general modeling methodology based on data-training a generative neural network. The proposed generative model has a two-stage structure that first predicts the link state (line-of-sight, non-line-of-sight, or outage), and subsequently feeds this state into a conditional variational autoencoder (VAE) that generates the path losses, delays, and angles of arrival and departure for all the propagation paths. The methodology is demonstrated for 28∼GHz air-to-ground channels between UAVs and a cellular system in representative urban environments, with training datasets produced through ray tracing. The demonstration extends to both standard base stations (installed at street level and downtilted) as well as dedicated base stations (mounted on rooftops and uptilted). The proposed approach is able to capture complex statistical relations in the data and it significantly outperforms standard 3GPP models, even after refitting the parameters of those models to the data.

Original languageEnglish
Pages (from-to)9417-9431
Number of pages15
JournalIEEE Transactions on Wireless Communications
Volume21
Issue number11
DOIs
Publication statusPublished - 1 Nov 2022
MoE publication typeA1 Journal article-refereed

Keywords

  • 3GPP
  • 5G
  • air to ground
  • cellular network
  • channel model
  • drone
  • generative neural network
  • mmWave communication
  • ray tracing
  • UAV
  • variational autoencoder

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