@inproceedings{dbdaac458c4e4595abfae2a6127deaf0,
title = "5GHz Simplified Beam Forming Wireless IoT Communication using Wi-Fi Backscatter (Invited Paper)",
abstract = "In order to realize smart factory which is appeared in the concepts of Society 5.0 and Industry 4.0, wireless Internet of Things (IoT) becomes a key technology. Inside of the factory, there are heavy DATA traffics exist between moving/movable machine tools/robots/automated guided vehicle (AGV) with wireless access point (AP) and high speed moving/rotating objects/materials with wireless sensor node (SN). Currently, wireless systems used for wireless IoT are limited such as wireless-LAN/Bluetooth/RFID. Since these system's frequency bands are limited and narrow, the interference between these systems becomes severe. In this paper, we propose a simplified beam forming wireless IoT communication using novel Wi-Fi backscatter system to notify the existence of SN who wants to send its DATA to AP. For Wi-Fi AP with beamforming function, knowing the numbers of existing SNs in each beam area will be a help for efficient beam control. This paper describes the Wi-Fi backscatter system in which the SNs backscatter the Wi-Fi signal transmitted from the AP then the AP detects the backscatter signals from SNs and know the existing SN's number in its beam area. Since this backscatter system uses Wi-Fi modulated signal, the separation of SNs' backscatter signals from AP's transmitting Wi-Fi signal becomes complicated. This paper also describes the transceiver architecture of AP which reduces the complexity of signal processing and improves the dynamic range of reception.",
keywords = "Backscatter, Beamforming, IoT, Microwaves, RF, RFID, Transceiver, Wi-Fi, Wireless",
author = "Noriharu Suematsu and Koki Edamatsu and Taiki MacHii and Mizuki Motoyoshi and Suguru Kameda and Takashi Shiba",
note = "Funding Information: Fig.4 Calculated and measured AP-SN distance vs. received power and measured down-converted spectrum at D=0.3m ACKNOWLEDGMENT This work includes results of the project entitled “R&D on Adaptive Media Access Control for Increasing the Capacity of Wireless IoT Devices in Factory Sites,” which is supported by the Ministry of Internal Affairs and Communications as part of the research program “R&D for Expansion of Radio Wave Resources (JPJ000254)”. Publisher Copyright: {\textcopyright} 2021 IEEE.; 2021 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2021 ; Conference date: 25-08-2021 Through 27-08-2021",
year = "2021",
month = aug,
day = "25",
doi = "10.1109/RFIT52905.2021.9565254",
language = "English",
series = "2021 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2021",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "2021 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2021",
address = "United States",
}