Sumitomo Electric Industries, Limited

Tadashi Araki

Akihiro Kamemura

Keiji Tanaka

Noriyuki Hirakata

Kenji Kutsuki

Takashi Yamamoto

Yoji Okada

Hideaki Sakai

Kazunori Hayashi

An amplifying deviceof the present invention performs distortion compensation on distortion appearing in input-output characteristics of an amplifierbased on an input signal and an output signal of the amplifier, and includes a predistorterthat obtains the input signal and the output signal and performs distortion compensation of the amplifier; an ACLR calculation unitthat detects the distortion level of the distortion of the amplifier; and an adjustment unitthat adjusts the power of the input signal in accordance with the distortion level.

Amplifying device and wireless transmission device using the same

To reduce the affections of noises having greater instantaneous powers than received signals. A receiver of block transmission scheme, in which signal blocks from a transmitting end are received and equalization is performed for each of the received signal blocks, comprises a local noise detecting unit detecting a local noise locally existing in a received signal block and having a greater amplitude than the signals; a local noise eliminating unit generating a local-noise-eliminated received signal block in which the signals in the range where the local noise is existent within the received signal block have been eliminated together with the local noise; and an equalizer that performs an equalization based on the local-noise-eliminated received signal block.

Receiver, transmitter, transmission system, and transmission method

Road transmission antennas () are disposed along a road, each radiating a single cell (E) with electromagnetic waves at the same frequency and of the same content. A vehicle mounted device () receiving the waves from the road transmission antennas () performs antenna pattern diversity reception. When entering a wave blocking area of a large vehicle, a small vehicle is provided with seamless communications with a stationary station.

Roadway communication system

Road transmission antennas ( ) are disposed along a road, each radiating a single cell (E) with electromagnetic waves at the same frequency and of the same content. A vehicle mounted device ( ) receiving the waves from the road transmission antennas ( ) performs antenna pattern diversity reception. When entering a wave blocking area of a large vehicle, a small vehicle is provided with seamless communications with a stationary station (FIG. ).

Growing community of inventors

Osaka, Japan

Tadashi Araki