Title:
WIRELESS COMMUNICATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2024/014019
Kind Code:
A1
Abstract:
A wireless communication system comprising a transmitter that transmits an unmodulated carrier wave, a plurality of passive terminals, and a receiver. Each of the plurality of passive terminals receives the carrier wave, superimposes a subcarrier with a predetermined frequency for each of the plurality of passive terminals on the backscatter of the carrier wave, modulates the subcarrier with a signal generated by a signal source using a predetermined modulation scheme, and transmits the backscatter. The receiver receives the plurality of backscatters transmitted from the plurality of passive terminals, generates a finite-length data string having an I component and a Q component, by performing frequency conversion and orthogonal transformation on the plurality of backscatters, and demodulates the signal of the signal source at each of the plurality of passive terminals by removing interference components from the finite-length data string.
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Inventors:
MITSUGI JIN (JP)
SAKABE HARUKI (JP)
SAKABE HARUKI (JP)
Application Number:
PCT/JP2023/005227
Publication Date:
January 18, 2024
Filing Date:
February 15, 2023
Export Citation:
Assignee:
DENSO WAVE INC (JP)
UNIV KEIO (JP)
UNIV KEIO (JP)
International Classes:
H04J1/00; H04B1/10; H04B1/59
Other References:
HITOSHI MIYOSHI, YUSUKE KAWAKITA, HARUHISA ICHIKAWA: "Intra and Inter System Interference Rejection in Multi-Carrier Backscatter Communications", IEICE TECHNICAL REPORT, SRW, IEICE, JP, vol. 119, no. 450 (SRW2019-61), 26 February 2020 (2020-02-26), JP, pages 9 - 14, XP009552615
MIYOSHI HITOSHI, RAJORIA NITISH, YUSUKE KAWAKITA, HARUHISA ICHIKAWA: "Fully synchronous sensor data streaming in passive backscatter communication", IEICE TECHNICAL REPORT, vol. 117, no. 310, 17 November 2017 (2017-11-17), XP093128426
RAJORIA NITISH, IGARASHI YUKI, MITSUGI JIN, KAWAKITA YUUSUKE, ICHIKAWA HARUHISA: "Concurrent Backscatter Streaming from Batteryless and Wireless Sensor Tags with Multiple Subcarrier Multiple Access", IEICE TRANSACTION ON COMMUNICATION, COMMUNICATIONS SOCIETY, TOKYO., JP, vol. E100.B, no. 12, 1 January 2017 (2017-01-01), JP , pages 2121 - 2128, XP093128427, ISSN: 0916-8516, DOI: 10.1587/transcom.2016EBP3472
MIYOSHI HITOSHI, RAJORIA NITISH, YUSUKE KAWAKITA, HARUHISA ICHIKAWA: "Fully synchronous sensor data streaming in passive backscatter communication", IEICE TECHNICAL REPORT, vol. 117, no. 310, 17 November 2017 (2017-11-17), XP093128426
RAJORIA NITISH, IGARASHI YUKI, MITSUGI JIN, KAWAKITA YUUSUKE, ICHIKAWA HARUHISA: "Concurrent Backscatter Streaming from Batteryless and Wireless Sensor Tags with Multiple Subcarrier Multiple Access", IEICE TRANSACTION ON COMMUNICATION, COMMUNICATIONS SOCIETY, TOKYO., JP, vol. E100.B, no. 12, 1 January 2017 (2017-01-01), JP , pages 2121 - 2128, XP093128427, ISSN: 0916-8516, DOI: 10.1587/transcom.2016EBP3472
Attorney, Agent or Firm:
TOHDA, Kiyoshi (JP)
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