Title:
COMMUNICATION DEVICE AND ESTIMATION METHOD
Document Type and Number:
WIPO Patent Application WO/2022/244141
Kind Code:
A1
Abstract:
One embodiment of the present invention pertains to a communication device comprising: a synchronization unit for performing synchronization processing adapted to a Doppler shift for a reception signal; and an equalization unit for performing equalization processing for the reception signal for which the synchronization processing has been performed, wherein the synchronization unit comprises: a correlator which outputs a correlation between the reception signal and a known preamble sequence, and a correlation between the reception signal and a known postamble sequence; a slide correlator which outputs a sliding correlation on the basis of an output of the correlator; and a Doppler estimation unit which estimates a Doppler shift on the basis of the sliding correlation of the slide correlator.
Inventors:
FUKUMOTO HIROYUKI (JP)
FUJINO YOSUKE (JP)
TSUBAKI TOSHIMITSU (JP)
OIWA MIHARU (JP)
ITO YUYA (JP)
NAKANO MARINA (JP)
FUJINO YOSUKE (JP)
TSUBAKI TOSHIMITSU (JP)
OIWA MIHARU (JP)
ITO YUYA (JP)
NAKANO MARINA (JP)
Application Number:
PCT/JP2021/018989
Publication Date:
November 24, 2022
Filing Date:
May 19, 2021
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H04B11/00
Domestic Patent References:
| WO2008157609A2 | 2008-12-24 |
Foreign References:
| JP2006217267A | 2006-08-17 | |||
| JPH08149056A | 1996-06-07 |
Other References:
M. JOHNSONL. FREITAGM. STOJANOVIC: "Improved Doppler tracking and correction for underwater acoustic communications", 1997 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, MUNICH, vol. 1, 1997, pages 575 - 578
B. S. SHARIFJ. NEASHAMO. R. HINTONA. E. ADAMS: "A computationally efficient Doppler compensation system for underwater acoustic communications", IEEE JOURNAL OF OCEANIC ENGINEERING, vol. 25, no. 1, January 2000 (2000-01-01), pages 52 - 61
M. STOJANOVICJ. PREISIG: "Underwater acoustic communication channels: Propagation models and statistical characterization", IEEE COMMUNICATIONS MAGAZINE, vol. 47, no. 1, January 2009 (2009-01-01), pages 84 - 89
B. S. SHARIFJ. NEASHAMO. R. HINTONA. E. ADAMS: "A computationally efficient Doppler compensation system for underwater acoustic communications", IEEE JOURNAL OF OCEANIC ENGINEERING, vol. 25, no. 1, January 2000 (2000-01-01), pages 52 - 61
M. STOJANOVICJ. PREISIG: "Underwater acoustic communication channels: Propagation models and statistical characterization", IEEE COMMUNICATIONS MAGAZINE, vol. 47, no. 1, January 2009 (2009-01-01), pages 84 - 89
Attorney, Agent or Firm:
SHIGA INTERNATIONAL PATENT OFFICE (JP)
Download PDF: