Fujitsu Corporation

Masayuki Oonuki

Manabu Miyamoto

Takao Sasaki

Yasuhiro Shibuya

Hiroyuki Miura

Hiromi Miyamoto

Koji Hirai

A wireless communication device performing wireless communication by switching between transmission timing and reception timing in time division, controls to supply a heater or a fan with power supplied from a power supply unit in the reception timing period, and controls to suspend supplying the heater or the fan with the power supplied from the power supply unit in the transmission timing period, in case that a temperature detected by a temperature detector is outside a specified temperature range while a time-division switchover between the transmission timing and the reception timing is performed.

Wireless communication device

Provided is a distortion compensation apparatus which can correspond to the number of carriers adaptively. The apparatus includes a distortion compensation processing circuit multiplying an input signal by a distortion compensation coefficient; a distortion compensation coefficient storage storing the distortion compensation coefficient correspondingly to the input signal power; a distortion compensation coefficient calculator calculating an update value of the distortion compensation coefficient stored in the distortion compensation coefficient storage, based on the input signal and a feedback signal being feedbacked from the output side of a distortion device; a digital filter inputting the output of the distortion compensation processing circuit. Further is included a modifying unit, which modifies the passband of the digital filter so as to reduce a distortion compensation control bandwidth in the predistortion portion, in response to the reduction of the number of carriers in the input signal.

Distortion compensation apparatus

Growing community of inventors

Kawasaki, Japan

Masayuki Oonuki