US 11,990,683 B2
Wireless communication device and wireless communication method
Takuji Mochizuki, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Appl. No. 17/628,314
Filed by NEC Corporation, Tokyo (JP)
PCT Filed May 26, 2020, PCT No. PCT/JP2020/020714
§ 371(c)(1), (2) Date Jan. 19, 2022,
PCT Pub. No. WO2021/019885, PCT Pub. Date Feb. 4, 2021.
Claims priority of application No. 2019-141082 (JP), filed on Jul. 31, 2019.
Prior Publication US 2022/0285853 A1, Sep. 8, 2022
Int. Cl. H01Q 21/06 (2006.01); H01Q 3/26 (2006.01); H04B 7/06 (2006.01)
CPC H01Q 21/06 (2013.01) [H01Q 3/26 (2013.01); H04B 7/06 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A wireless communication device comprising:
a plurality of antennas;
a plurality of transmitter-receivers that are provided in association with each of the plurality of antennas, and that each include a transmitter and a receiver;
a calibration transmitter-receiver;
a distribution synthesis unit; and
a control unit, wherein
the control unit causes a transmission calibration signal to be sent to each transmitter to be orthogonalized in frequency for each transmitter,
each transmitter sends the transmission calibration signal being orthogonalized in frequency,
the distribution synthesis unit synthesizes the transmission calibration signals being sent from the transmitters and transmits the synthesized signal to the calibration transmitter-receiver, and
the control unit applies phase modulation to a phase of a subcarrier being used by each transmitter for sending out the transmission calibration signal, for each transmitter.