Title:
WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD
Document Type and Number:
WIPO Patent Application WO/2014/189129
Kind Code:
A1
Abstract:
A wireless communication apparatus comprises: a designation unit that generates format designation information for designating, to another wireless communication apparatus, a transmission/reception format; a first transmission unit that wirelessly transmits the format designation information to the other wireless communication apparatus; an acquisition unit acquires a packet; a propagation channel estimation unit that estimates, on the basis of the packet, upstream propagation channel information indicating a propagation channel from the other wireless communication apparatus to the local wireless communication apparatus; a calibration factor calculation unit that calculates a calibration factor on the basis of both downstream propagation channel information indicating a propagation channel from the local wireless communication apparatus to the other wireless communication apparatus and the upstream propagation channel information; a transmission weight value calculation unit that calculates a transmission weight value on the basis of the calibration factor and the upstream propagation channel information; and a second transmission unit that wirelessly transmits, on the basis of the transmission weight value, a predetermined signal to the other wireless communication apparatus.
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Inventors:
FUKUZONO HAYATO (JP)
MURAKAMI TOMOKI (JP)
KUDO RIICHI (JP)
SHINOHARA SHOKO (JP)
TAKATORI YASUSHI (JP)
MIZOGUCHI MASATO (JP)
MURAKAMI TOMOKI (JP)
KUDO RIICHI (JP)
SHINOHARA SHOKO (JP)
TAKATORI YASUSHI (JP)
MIZOGUCHI MASATO (JP)
Application Number:
PCT/JP2014/063701
Publication Date:
November 27, 2014
Filing Date:
May 23, 2014
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H04J99/00; H04J11/00; H04W16/28
Foreign References:
| JP2007517440A | 2007-06-28 | |||
| JP2007523570A | 2007-08-16 | |||
| JP2010028599A | 2010-02-04 | |||
| JP2012525084A | 2012-10-18 |
Other References:
QUALCOMM EUROPE: "Calibration Procedures for TDD Beamforming", 3GPP R1-080494, 18 January 2008 (2008-01-18), XP050109010
TOMOKI MURAKAMI ET AL.: "Study for Implicit Beamforming in Massive MU-MIMO Systems-Part 1", 2013 NEN THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS SOGO TAIKAI KOEN RONBUNSHU 1, 5 March 2013 (2013-03-05), pages 625, B-5 - 215, XP008181272
MASAHIRO MORIKURA; SHUJI KUBOTA: "Third Revised Version 802.11 High Speed Wireless LAN Textbook", IMPRESS R&D, 11 April 2008 (2008-04-11), pages 206 - 280
Q. H. SPENCER; A. L. SWINDLEHURST; M. HAARDT: "Zero-Forcing Methods for Downlink Spatial Multiplexing in Multiuser MIMO Channels", IEEE TRANS. SIG. PROCESSING, vol. 52, no. 2, February 2004 (2004-02-01), pages 461 - 471, XP011105731, DOI: doi:10.1109/TSP.2003.821107
"Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications", IEEE STD. 802.11-2012, 2012
"Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications", IEEE STD. 802.11AC, 2013
H. FUKUZONO; T. MURAKAMI; R. KUDO; Y. TAKATORI; M. MIZOGUCHI: "Weighted-combining calibration for implicit feedback beamforming on downlink multiuser MIMO systems", PROC. IEEE PIMRC, vol. 13, September 2013 (2013-09-01), pages 846 - 850, XP055394472, DOI: doi:10.1109/PIMRC.2013.6666254
See also references of EP 2988443A4
TOMOKI MURAKAMI ET AL.: "Study for Implicit Beamforming in Massive MU-MIMO Systems-Part 1", 2013 NEN THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS SOGO TAIKAI KOEN RONBUNSHU 1, 5 March 2013 (2013-03-05), pages 625, B-5 - 215, XP008181272
MASAHIRO MORIKURA; SHUJI KUBOTA: "Third Revised Version 802.11 High Speed Wireless LAN Textbook", IMPRESS R&D, 11 April 2008 (2008-04-11), pages 206 - 280
Q. H. SPENCER; A. L. SWINDLEHURST; M. HAARDT: "Zero-Forcing Methods for Downlink Spatial Multiplexing in Multiuser MIMO Channels", IEEE TRANS. SIG. PROCESSING, vol. 52, no. 2, February 2004 (2004-02-01), pages 461 - 471, XP011105731, DOI: doi:10.1109/TSP.2003.821107
"Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications", IEEE STD. 802.11-2012, 2012
"Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications", IEEE STD. 802.11AC, 2013
H. FUKUZONO; T. MURAKAMI; R. KUDO; Y. TAKATORI; M. MIZOGUCHI: "Weighted-combining calibration for implicit feedback beamforming on downlink multiuser MIMO systems", PROC. IEEE PIMRC, vol. 13, September 2013 (2013-09-01), pages 846 - 850, XP055394472, DOI: doi:10.1109/PIMRC.2013.6666254
See also references of EP 2988443A4
Attorney, Agent or Firm:
SHIGA INTERNATIONAL PATENT OFFICE (JP)
Patent business corporation Shiga international patent firm (JP)
Patent business corporation Shiga international patent firm (JP)
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