US 12,413,274 B2
Wireless communication system, wireless communication method, and transmitter
Keita Kuriyama, Musashino (JP); Hayato Fukuzono, Musashino (JP); and Toshifumi Miyagi, Musashino (JP)
Assigned to NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
Appl. No. 18/291,261
Filed by NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
PCT Filed Aug. 10, 2021, PCT No. PCT/JP2021/029518
§ 371(c)(1), (2) Date Jan. 23, 2024,
PCT Pub. No. WO2023/017564, PCT Pub. Date Feb. 16, 2023.
Prior Publication US 2024/0333347 A1, Oct. 3, 2024
Int. Cl. H04B 7/02 (2018.01); H04B 7/0417 (2017.01); H04B 7/0456 (2017.01)
CPC H04B 7/0456 (2013.01) [H04B 7/0417 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A radio communication system that performs MIMO transmission, the radio communication system comprising:
precoding circuitry configured to precode multi-streams of transmission signals in a time domain;
a plurality of transmission power control circuitry configured to control transmission power of each multi-stream precoded by the precoding circuitry;
a plurality of amplification circuitry configured to amplify each multi-stream precoded by the precoding circuitry in accordance with control of the plurality of transmission power control circuitry; and
a number-of-taps control circuitry configured to perform control to change a number of taps of the precoding circuitry to improve communication quality of the multi-streams on a basis of quality information of a received signal fed back from a reception device that has received the multi-stream amplified by each of the plurality of amplification circuitry or quality information of a received signal calculated using at least characteristics of the plurality of amplification circuitry.