Mitsubishi Electric Corporation

Manabu Sakai

Hiroshi Nishimoto

Hiroyasu Sano

Hiroki Iura

Koji Tomitsuka

Yasunori Kato

Kenichiro Kamohara

A wireless relay station to be included in a ladder-type wireless relay network along a moving route of a moving object includes a relay control unit that includes station identification information in the wireless relay network assigned sequentially along the moving route to each of the wireless relay stations included in the wireless relay network and deployed along the moving route, configures and updates, using a first routing table that provides an address of a destination wireless relay station, a second routing table including the address, the station identification information, and an information update time, being associated with one another, of the destination wireless relay station, and provides control to share, among the wireless relay stations included in the wireless relay network, the second routing table configured and updated by each wireless relay station; and a relay communication unit that performs wireless relay communication with other wireless relay stations.

Wireless relay station, wireless relay system, control circuit, storage medium, and wireless relay method

A communication device according to the present invention is a communication device that wirelessly communicates with a counterpart communication device in a full-duplex mode using orbital angular momentum, and includes a second interference cancellation circuit that generates a replica of an interference signal received together with one or more signals transmitted from the counterpart communication device, on the basis of one or more signals to be transmitted to the counterpart communication device, and subtracts the replica from a received signal.

Communication device and program storage medium

An interference cancellation device includes a data symbol extraction unit that extracts a data symbol portion from a received signal, a null symbol extraction unit that extracts a null symbol portion from the received signal, a data symbol power calculation unit that calculates a data symbol power estimated value, a null symbol power calculation unit that calculates a null symbol power estimated value, a null symbol spectrum calculation unit that calculates a null symbol spectrum from a null symbol signal, and an interference center frequency estimation unit that eliminates the effect of an image for an interference in calculation of an interference bandwidth when is calculating an interference center frequency estimated value, using a data symbol signal, the data symbol power estimated value, the null symbol power estimated value, and the null symbol spectrum.

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Tokyo, Japan

Manabu Sakai