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Over-the-air computation for IoT networks : computing multiple functions with antenna arrays

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Chen, Li, Zhao, Nan, Chen, Yunfei, Yu, F. Richard and Wei, Guo (2018) Over-the-air computation for IoT networks : computing multiple functions with antenna arrays. IEEE Internet of Things Journal, 5 (6). pp. 5296-5306. doi:10.1109/JIOT.2018.2843321 ISSN 2327-4662.

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Official URL: https://doi.org/10.1109/JIOT.2018.2843321

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Abstract

Over-the-air computation combines communication and computation efficiently by utilizing the superposition prop- erty of wireless channels, when Internet of Things (IoT) networks focus more on the computed functions than the individual messages. In this work, we study the computation of multiple linear functions of Gaussian sources over-the-air using antenna arrays at both the IoT devices and the IoT access point (AP). The key challenges in this study are the intra-node interference of multiple functions, the non-uniform fading between different IoT devices and the massive channel state information (CSI) required at the IoT AP. We propose a novel transmitter design at the IoT devices with zero-forcing beamforming to cancel the intra-node interference and uniform-forcing power control to compensate the non-uniform fading. In order to avoid massive CSI requirement, receive antenna selection is adopted at the IoT AP and a corresponding signaling procedure is proposed utilizing the β€œOR” property of the wireless channel. The performance of the proposed transceiver design is analyzed. The closed-form expression for the mean squared function error (MSFE) outage is derived. Due to the complexity of the expression, an asymptotic analysis of the MSFE outage is further provided to demonstrate the diversity order in terms of the transmit power constraint and the number of IoT devices. Simulation results are presented to show the performance of the proposed design.

Item Type: Journal Article
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science, Engineering and Medicine > Engineering > Engineering
Library of Congress Subject Headings (LCSH): Antenna arrays, Internet of things
Journal or Publication Title: IEEE Internet of Things Journal
Publisher: IEEE
ISSN: 2327-4662
Official Date: December 2018
Dates:
DateEvent
December 2018Published
4 June 2018Available
29 May 2018Accepted
Volume: 5
Number: 6
Page Range: pp. 5296-5306
DOI: 10.1109/JIOT.2018.2843321
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Date of first compliant deposit: 1 June 2018
Date of first compliant Open Access: 4 June 2018
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
2017ZX03001003-003Ministry of Science and Technology of the People's Republic of Chinahttp://dx.doi.org/10.13039/501100002855
61601432National Natural Science Foundation of Chinahttp://dx.doi.org/10.13039/501100001809
2018D03Southeast Universityhttp://dx.doi.org/10.13039/501100008081
UNSPECIFIEDXinghai Scholars ProgramUNSPECIFIED
DUT17JC43Fundamental Research Funds for the Central UniversitiesUNSPECIFIED
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