Title:
RECEPTION DEVICE, CONTROL CIRCUIT, STORAGE MEDIUM, AND COMMUNICATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/117118
Kind Code:
A1
Abstract:
A reception device (20) is characterized by being provided with: a preamble extraction unit (204) for extracting, from a reception signal, a preamble including a first preamble that has been spectrum spread by using an up chirp signal the frequency of which linearly increases and a second preamble that has been spectrum spread by using a down chirp signal the frequency of which linearly decreases; a first frequency offset estimation unit (213) for estimating a frequency offset in a time domain on the basis of the first preamble and outputting a first frequency offset indicating an estimated value; a second frequency offset estimation unit (214) for estimating a frequency offset in the time domain on the basis of the second preamble and outputting a second frequency offset indicating an estimated value; and a third frequency offset estimation unit (215) for estimating a third frequency offset caused by a frequency deviation between transmission and reception on the basis of the first frequency offset and second frequency offset.
Inventors:
OHASHI AKINORI (JP)
Application Number:
PCT/JP2019/048194
Publication Date:
June 17, 2021
Filing Date:
December 10, 2019
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H04W72/04; H04B1/69
Foreign References:
| JP2019021964A | 2019-02-07 | |||
| JP5699142B2 | 2015-04-08 |
Other References:
ALEXANDER N. LOZHKIN: "A NEW METHOD FOR HIGH-SPEED INITIAL SYNCHRONIZATION", IEEE 5TH INTERNATIONAL SYMPOSIUM ON SPREAD SPECTRUM TECHNIQUES AND APPLICATIONS, vol. 2, 2 September 1998 (1998-09-02), pages 449 - 453, XP010307613, ISBN: 0-7803-4281-X
KOIKE YASUTAKA, SATORU ISHII, RYUJI KOHNO: "DS/Chirp Hybrid Industrial UWB System for Ranging and High Reliability Comuunications", PROCEEDINGS OF ASIA-PACIFIC CONFERENCE ON COMMUNICATIONS (APCC), 2008, pages 1 - 5, XP031417964, ISBN: 978-4-88552-232-1
QIAN YUBI; MA LU; LIANG XUWEN: "The Acquisition Method of Symmetry Chirp Signal Used in LEO Satellite Internet of Things", IEEE COMMUNICATIONS LETTERS, vol. 23, no. 9, 2 July 2019 (2019-07-02), pages 1572 - 1575, XP011745022, ISSN: 1089-7798, DOI: 10.1109/LCOMM.2019.2926262
KOIKE YASUTAKA, SATORU ISHII, RYUJI KOHNO: "DS/Chirp Hybrid Industrial UWB System for Ranging and High Reliability Comuunications", PROCEEDINGS OF ASIA-PACIFIC CONFERENCE ON COMMUNICATIONS (APCC), 2008, pages 1 - 5, XP031417964, ISBN: 978-4-88552-232-1
QIAN YUBI; MA LU; LIANG XUWEN: "The Acquisition Method of Symmetry Chirp Signal Used in LEO Satellite Internet of Things", IEEE COMMUNICATIONS LETTERS, vol. 23, no. 9, 2 July 2019 (2019-07-02), pages 1572 - 1575, XP011745022, ISSN: 1089-7798, DOI: 10.1109/LCOMM.2019.2926262
Attorney, Agent or Firm:
TAKAMURA, Jun (JP)
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