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Title:
WIRELESS BASE STATION AND WIRELESS COMMUNICATION METHOD
Document Type and Number:
WIPO Patent Application WO/2018/154937
Kind Code:
A1
Abstract:
In a wireless communication system for carrying out beam-forming during MIMO transmission between a wireless base station and at least one user terminal, a wireless base station (10) is provided with: a weight control unit (104) that determines a beam-forming weight used for the beam-forming in each sub-band configured by dividing a transmission band; and a communication unit (109) that transmits a signal to which the beam-forming has been applied by using the beam-forming weight.

Inventors:
YOSHIOKA, Shohei (NTT DOCOMO INC., SANNO PARK TOWER, 11-1, Nagatacho 2-chome, Chiyoda-k, Tokyo 50, 〒1006150, JP)
SUYAMA, Satoshi (NTT DOCOMO INC., SANNO PARK TOWER, 11-1, Nagatacho 2-chome, Chiyoda-k, Tokyo 50, 〒1006150, JP)
MASHINO, Jun (NTT DOCOMO INC., SANNO PARK TOWER, 11-1, Nagatacho 2-chome, Chiyoda-k, Tokyo 50, 〒1006150, JP)
OKUYAMA, Tatsuki (NTT DOCOMO INC., SANNO PARK TOWER, 11-1, Nagatacho 2-chome, Chiyoda-k, Tokyo 50, 〒1006150, JP)
OKUMURA, Yukihiko (NTT DOCOMO INC., SANNO PARK TOWER, 11-1, Nagatacho 2-chome, Chiyoda-k, Tokyo 50, 〒1006150, JP)
Application Number:
JP2017/045367
Publication Date:
August 30, 2018
Filing Date:
December 18, 2017
Export Citation:
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Assignee:
NTT DOCOMO, INC. (11-1, Nagatacho 2-chome Chiyoda-k, Tokyo 50, 〒1006150, JP)
International Classes:
H04B7/0456; H04B7/0413; H04B7/0452; H04L27/26; H04W16/28
Domestic Patent References:
WO2013129502A12013-09-06
Foreign References:
JP2016006984A2016-01-14
JP2010539807A2010-12-16
JP2014075679A2014-04-24
Other References:
YOSHIOKA ET AL: "performance evacuation pf massive mimo with digital beamforming in low SHF bands fo 5G", IEICE TECHNICAL REPORT, no. 472, 24 February 2016 (2016-02-24), pages 261 - 266
Attorney, Agent or Firm:
WASHIDA, Kimihito (8th Floor, Shinjuku First West Bldg. 1-23-7, Nishi-Shinjuku, Shinjuku-k, Tokyo 23, 〒1600023, JP)
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