Title:
WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION METHOD, AND WIRELESS COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/157182
Kind Code:
A1
Abstract:
The present disclosure relates to a wireless communication system that is suitable for line-of-sight MIMO propagation associated with movement of transmission and reception stations. This system is a wireless communication system configured from a transmission station and a reception station equipped with a plurality of antennas, the wireless communication system including the functions described below. The transmission station or the reception station estimates channel information between a transmission antenna and a reception antenna (function 1). All combinations of a sub-array configuration are derived in accordance with the number of transmission antennas, the number of reception antennas, and the number of transmitted signals (function 2). A precoding matrix with which in-phase synthesis for a selected reception antenna is possible is derived with regard to all combinations (function 3). A channel capacity is calculated with regard to all combinations from the channel information and the precoding matrix (function 4). An optimal precoding matrix with which the channel capacity is at maximum is selected (function 5). Transmission-side control information is determined from the optimal precoding matrix (function 6). The transmission station switches the output destination for one or a plurality of signals on the basis of the transmission-side control information and forms a discretionary sub-array corresponding to each signal (function 7). In-phase synthesis by phase control is performed in a desired reception antenna using the sub-array (function 8). The reception station synthesizes, separates, and demodulates signals sent from the transmission station (function 9).
Inventors:
TATEGAMI KOYO (JP)
GOTO DAISUKE (JP)
YAMASHITA FUMIHIRO (JP)
ITOKAWA KIYOHIKO (JP)
GOTO DAISUKE (JP)
YAMASHITA FUMIHIRO (JP)
ITOKAWA KIYOHIKO (JP)
Application Number:
PCT/JP2022/006406
Publication Date:
August 24, 2023
Filing Date:
February 17, 2022
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H04B7/0413; H04B7/0456
Foreign References:
| JP2008125068A | 2008-05-29 | |||
| JP2012531087A | 2012-12-06 |
Attorney, Agent or Firm:
TAKADA, TAKAHASHI & PARTNERS (JP)
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