Title:
RADIO COMMUNICATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2017/188181
Kind Code:
A1
Abstract:
Provided is a radio communication system which enables radio communication using multiple low-cost radio terminals and which removes cross-talk resulting from multiple access. In order to create an interference component, an analysis data string is created by subjecting a subcarrier data string, obtained by extracting a target subcarrier component from a finite length data string, to a Hilbert transform using a Hilbert transform processing unit, while a carrier phase difference Ψ is estimated using regression analysis performed by a carrier phase estimating unit. The analysis data string is subjected to a rotation operation to return the analysis data string by an amount equivalent to the carrier phase difference Ψ, after which the analysis data string is transformed into an angle data string which is multiplied by a desired odd number and is then subjected to an inverse Hilbert transform.
Inventors:
MITSUGI JIN (JP)
IGARASHI YUKI (JP)
ICHIKAWA HARUHISA (JP)
KAWAKITA YUUSUKE (JP)
EGAWA KIYOSHI (JP)
IGARASHI YUKI (JP)
ICHIKAWA HARUHISA (JP)
KAWAKITA YUUSUKE (JP)
EGAWA KIYOSHI (JP)
Application Number:
PCT/JP2017/016192
Publication Date:
November 02, 2017
Filing Date:
April 24, 2017
Export Citation:
Assignee:
KYOWA ELECTRONIC INSTRUMENTS (JP)
International Classes:
H04J1/00; G06K7/10; G06K19/07; H04B1/59; H04B5/02
Foreign References:
| JP2011516332A | 2011-05-26 | |||
| JP2003168991A | 2003-06-13 | |||
| JP2016076881A | 2016-05-12 |
Other References:
YUKI IGARASHI ET AL.: "A performance analysis of interference rejection technique in multi-subcarrier multiple access", 2015 IEEE INTERNATIONAL CONFERENCE ON RFID TECHNOLOGY AND APPLICATIONS (RFID-TA), September 2015 (2015-09-01), pages 33 - 38, XP032849209
YUKI IGARASHI ET AL.: "A Feasibility Study on Simultaneous Data Collection from Multiple Sensor RF Tags with Multiple Subcarriers, RFID ( IEEE RFID", 2014 IEEE INTERNATIONAL CONFERENCE, 8 April 2014 (2014-04-08), pages 141 - 146, XP032593473
See also references of EP 3451557A4
YUKI IGARASHI ET AL.: "A Feasibility Study on Simultaneous Data Collection from Multiple Sensor RF Tags with Multiple Subcarriers, RFID ( IEEE RFID", 2014 IEEE INTERNATIONAL CONFERENCE, 8 April 2014 (2014-04-08), pages 141 - 146, XP032593473
See also references of EP 3451557A4
Attorney, Agent or Firm:
SHIN-YU INTERNATIONAL PATENT FIRM (JP)
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