US 11,870,517 B2
Wireless communication system, wireless communication method, transmitting station device and receiving station device
Keita Kuriyama, Musashino (JP); Hayato Fukuzono, Musashino (JP); Masafumi Yoshioka, Musashino (JP); and Tsutomu Tatsuta, Musashino (JP)
Assigned to NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
Appl. No. 17/602,192
Filed by NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
PCT Filed Mar. 26, 2020, PCT No. PCT/JP2020/013836
§ 371(c)(1), (2) Date Oct. 7, 2021,
PCT Pub. No. WO2020/209092, PCT Pub. Date Oct. 15, 2020.
Claims priority of application No. 2019-075560 (JP), filed on Apr. 11, 2019.
Prior Publication US 2022/0216900 A1, Jul. 7, 2022
Int. Cl. H04B 7/0456 (2017.01); H04B 7/005 (2006.01); H04B 7/06 (2006.01); H04B 7/08 (2006.01)
CPC H04B 7/0456 (2013.01) [H04B 7/005 (2013.01); H04B 7/06 (2013.01); H04B 7/08 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A wireless communication system comprising a transmitting station device and a receiving station device that performs single carrier MIMO transmission between the transmitting station device and the receiving station device,
wherein the transmitting station device comprising:
a time-domain linear equalization unit configured to remove inter-symbol interference and inter-stream interference from a data signal to be transmitted to the receiving station device;
a propagation path characteristics estimation unit configured to receive a training signal which is transmitted by the receiving station device and estimate a transfer function matrix of propagation path characteristics;
a filter tap calculation unit configured to calculate filter tap coefficients for the time-domain linear equalization unit based on the transfer function matrix by a predefined approach; and
a transmission mode determination unit configured to make the filter tap calculation unit calculate the filter tap coefficients when the transfer function matrix meets a predefined condition, and to change a transmission mode and determine the transmission mode that meets the predefined condition when the transfer function matrix does not meet the predefined condition, and
wherein the receiving station device comprising:
a training signal generation unit configured to generate the training signal for use in estimation of propagation path characteristics and transmit the training signal to the transmitting station device.