Title:
RECEIVER DEVICE, COMMUNICATION SYSTEM, CONTROL CIRCUIT, STORAGE MEDIUM, AND COMMUNICATION METHOD
Document Type and Number:
WIPO Patent Application WO/2023/170754
Kind Code:
A1
Abstract:
This receiver device is characterized by comprising an initial synchronization unit (23) that includes a first timing detecting unit (231), a search range calculating unit (237), a second timing detecting unit (238) and a timing coarse estimation unit (241). The first timing detecting unit (231) comprises a first correlation value calculating unit (232) for calculating a first correlation value that is the value of a cross-correlation function between a received signal, which includes a first preamble having been spectrally spread with a first chirp signal and a second preamble having been spectrally spread with a second chirp signal, and the first chirp signal, the first timing detecting unit (231) detecting a first timing at which the first correlation value peaks. The search range calculating unit (237) calculates a search range on the basis of the first timing. The second timing detecting unit (238) comprises a second correlation value calculating unit (239) for calculating a second correlation value strictly for the search range, and detects a second timing at which the second correlation value peaks. The timing coarse estimation unit (241) determines, on the basis of the first timing and the second timing, a coarse estimation result of a spreading code timing of multiplication by a spreading code in the transmitter device.
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Inventors:
FUKUMA MEGUMI (JP)
Application Number:
PCT/JP2022/009768
Publication Date:
September 14, 2023
Filing Date:
March 07, 2022
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H04B1/7073; H04W72/04
Domestic Patent References:
| WO2021140627A1 | 2021-07-15 |
Foreign References:
| US20130051433A1 | 2013-02-28 | |||
| JP2011130142A | 2011-06-30 | |||
| JP2018524890A | 2018-08-30 |
Other References:
MEGUMI FUKUMA, MASATSUGU HIGASHINAKA , RYOSUKE NAKAMURA, AND HIROSHI ARUGA: "A Novel Code Acquisition Scheme Using Multiple Chirp Signals Robust to Initial Frequency Offset", IEICE TECHNICAL REPORT, vol. 119, no. 377 (IT2019-46), 16 January 2020 (2020-01-16), pages 63 - 68, XP009548839, ISSN: 0913-5685
MEGUMI FUKUMA, MASATSUGU HIGASHINAKA, RYOSUKE NAKAMURA, HIROSHI ARUGA: "A Frame Timing Detection Scheme Using Multiple Zadoff-Chu Sequences for DS-SS Systems Employing Space-time Block Codes", IEICE TECHNICAL REPORT, vol. 121, no. 7, 15 April 2021 (2021-04-15), pages 36 - 41, XP009539539, ISSN: 2432-6380
MEGUMI FUKUMA, MASATSUGU HIGASHINAKA, AKINORI OHASHI, HIROSHI ARIGA: "B-5-58 Evaluation of characteristics of DS-SS initial acquisition in multipath environment using two chirp signals", IEICE 2020 COMMUNICATION SOCIETY CONFERENCE PROCEEDINGS 1; 2020.09.15-18, IEICE, JP, 1 September 2020 (2020-09-01) - 18 September 2020 (2020-09-18), JP, pages 258, XP009549411
MEGUMI FUKUMA, MASATSUGU HIGASHINAKA, RYOSUKE NAKAMURA, HIROSHI ARUGA: "A Frame Timing Detection Scheme Using Multiple Zadoff-Chu Sequences for DS-SS Systems Employing Space-time Block Codes", IEICE TECHNICAL REPORT, vol. 121, no. 7, 15 April 2021 (2021-04-15), pages 36 - 41, XP009539539, ISSN: 2432-6380
MEGUMI FUKUMA, MASATSUGU HIGASHINAKA, AKINORI OHASHI, HIROSHI ARIGA: "B-5-58 Evaluation of characteristics of DS-SS initial acquisition in multipath environment using two chirp signals", IEICE 2020 COMMUNICATION SOCIETY CONFERENCE PROCEEDINGS 1; 2020.09.15-18, IEICE, JP, 1 September 2020 (2020-09-01) - 18 September 2020 (2020-09-18), JP, pages 258, XP009549411
Attorney, Agent or Firm:
TAKAMURA, Jun (JP)
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