University of Oulu

Q. Zhang, A. Ferdowsi, W. Saad and M. Bennis, "Distributed Conditional Generative Adversarial Networks (GANs) for Data-Driven Millimeter Wave Communications in UAV Networks," in IEEE Transactions on Wireless Communications, vol. 21, no. 3, pp. 1438-1452, March 2022, doi: 10.1109/TWC.2021.3103971

Distributed conditional generative adversarial networks (GANs) for data-driven millimeter wave communications in UAV networks

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Author: Zhang, Qianqian1,2; Ferdowsi, Aidin1,2; Saad, Walid1,3;
Organizations: 1Bradley Department of Electrical and Computer Engineering, Virginia Tech, Blacksburg, VA 24061 USA
2Hughes Network Systems, Germantown, MD 20876 USA
3Department of Computer Science and Engineering, Kyung Hee University, Seoul 02447, South Korea
4Centre for Wireless Communications, University of Oulu, 90570 Oulu, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.9 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2022
Publish Date: 2022-09-02


In this paper, a novel framework is proposed to perform data-driven air-to-ground channel estimation for millimeter wave (mmWave) communications in an unmanned aerial vehicle (UAV) wireless network. First, an effective channel estimation approach is developed to collect mmWave channel information, allowing each UAV to train a stand-alone channel model via a conditional generative adversarial network (CGAN) along each beamforming direction. Next, in order to expand the application scenarios of the trained channel model into a broader spatial-temporal domain, a cooperative framework, based on a distributed CGAN architecture, is developed, allowing each UAV to collaboratively learn the mmWave channel distribution in a fully-distributed manner. To guarantee an efficient learning process, necessary and sufficient conditions for the optimal UAV network topology that maximizes the learning rate for cooperative channel modeling are derived, and the optimal CGAN learning solution per UAV is subsequently characterized, based on the distributed network structure. Simulation results show that the proposed distributed CGAN approach is robust to the local training error at each UAV. Meanwhile, a larger airborne network size requires more communication resources per UAV to guarantee an efficient learning rate. The results also show that, compared with a stand-alone CGAN without information sharing and two other distributed schemes, namely: A multi-discriminator CGAN and a federated-learning CGAN method, the proposed distributed CGAN approach yields a higher modeling accuracy while learning the environment, and it achieves a larger average data rate in the online performance of UAV downlink mmWave communications.

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Series: IEEE transactions on wireless communications
ISSN: 1536-1276
ISSN-E: 1558-2248
ISSN-L: 1536-1276
Volume: 21
Issue: 3
Pages: 1438 - 1452
DOI: 10.1109/twc.2021.3103971
Type of Publication: A1 Journal article – refereed
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: This work was supported by U.S. National Science Foundation under Grant CNS-1526844 and Grant CNS-1836802.
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