Title:
EQUALIZATION METHOD, EQUALIZATION DEVICE, AND RECEPTION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2023/170968
Kind Code:
A1
Abstract:
This reception system has one or more sub-arrays, a phase rotation unit, an equalization unit, and a calculation unit. The sub-arrays are composed of a set of a plurality of elements that have a strong correlation with Doppler frequency transition. The phase rotation unit performs, on a reception signal received by elements of the sub-arrays, a process involving phase rotation equal to a phase rotation amount calculated for the sub-array which to the element that received the reception signal belongs. The equalization unit performs an equalization process on the reception signals that have undergone the phase rotation process. The calculation unit, for each sub-array, averages the phase amounts of the reception signals by the elements belonging to the sub-array and calculates a phase rotation amount for performing phase compensation by using the averaged phase amount.
Inventors:
FUKUMOTO HIROYUKI (JP)
FUJINO YOSUKE (JP)
OMORI SEIJI (JP)
ITO YUYA (JP)
OIWA MIHARU (JP)
OKUMURA RYOTA (JP)
FUJINO YOSUKE (JP)
OMORI SEIJI (JP)
ITO YUYA (JP)
OIWA MIHARU (JP)
OKUMURA RYOTA (JP)
Application Number:
PCT/JP2022/011096
Publication Date:
September 14, 2023
Filing Date:
March 11, 2022
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H04B11/00
Foreign References:
| US20030214881A1 | 2003-11-20 | |||
| JP2001136114A | 2001-05-18 |
Other References:
SUZUOKI KOSUKE; HISANO DAISUKE; MARUTA KAZUKI; INOUE YOSHIAKI; HARA-AZUMI YUKO; NAKAYAMA YU: "Space- Time- Domain Adaptive Equalizer Employed Successive Interference Cancellation for Underwater Acoustic Communication", 2021 IEEE 94TH VEHICULAR TECHNOLOGY CONFERENCE (VTC2021-FALL), IEEE, 27 September 2021 (2021-09-27), pages 01 - 05, XP034043291, DOI: 10.1109/VTC2021-Fall52928.2021.9625200
FUKUMOTO HIROYUKI; FUJINO YOSUKE; NAKANO MARINA; SAKAMOTO KAZUMITSU; TSUBAKI TOSHIMITSU: "Field Experiments Demonstrating Mbps-Class Underwater Acoustic Communication with Spatio-Temporal Equalization", GLOBAL OCEANS 2020: SINGAPORE – U.S. GULF COAST, IEEE, 5 October 2020 (2020-10-05), pages 1 - 6, XP033896185, DOI: 10.1109/IEEECONF38699.2020.9389018
FUKUMOTO HIROYUKI; FUJINO YOSUKE; NAKANO MARINA; SAKAMOTO KAZUMITSU; TSUBAKI TOSHIMITSU: "Field Experiments Demonstrating Mbps-Class Underwater Acoustic Communication with Spatio-Temporal Equalization", GLOBAL OCEANS 2020: SINGAPORE – U.S. GULF COAST, IEEE, 5 October 2020 (2020-10-05), pages 1 - 6, XP033896185, DOI: 10.1109/IEEECONF38699.2020.9389018
Attorney, Agent or Firm:
SHIGA INTERNATIONAL PATENT OFFICE (JP)
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