Hitachi, Ltd.

Kosuke Aio

Yoshiaki Hasegawa

It is provided a wireless communication system comprising a terminal device and a base station. The terminal device includes a plurality of wireless transmitters, an antenna coupled to each of the wireless transmitters, and a controller generating a signal to be transmitted from the antenna. The base station includes a plurality of wireless receivers, an antenna coupled to each of the wireless receivers, and a controller. The terminal device holds a predetermined upper limit of power consumption. The base station changes at least one of a MIMO multiplexing number, a modulation system, and a coding rate so that communication is performed according to a communication system that can communicate at allowable transmission power of the terminal device in case where power consumption of the terminal device exceeds the upper limit upon performing the MIMO transmission at maximum transmission power according to the wireless standard.

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Yokohama, Japan

Kosuke Aio