Kabushiki Kaisha Toshiba

Jun Mitsugi

Takashi Wakutsu

Takeshi Tomizawa

Daisuke Takeda

Manabu Mukai

Kaoru Inoue

Shun-ichi Kubo

Noritaka Deguchi

An aspect of the invention provides a wireless communication apparatus that includes a generator configured to generate modulated signals; a mapping unit configured to map the modulated signals on at least one subcarrier in a frequency domain, the subcarrier being in a first subcarrier group corresponding to one of a plurality of subcarrier groups, wherein frequencies of the subcarrier mapped by the mapping unit is predefined by a pattern with slot, each slot including symbols in a time domain, the predefined pattern of the frequencies of each slot depending on a base station; and a transmitter configured to transmit the modulated signals mapped by the mapping unit.

Wireless communication apparatus and wireless communication method

An apparatus and method for operating with a first radio system and a second radio system. First and second information is stored in the apparatus. The first information indicates at least one first channel which is used by the first system if a signal of the first system is detectable, and the second information indicating at least one second which fails to be used by the first system. A controller controls the second system to switch from the second channel to a third channel if the detector detects that a signal received through the third communication channel fails to be used in the first system. The second system includes a plurality of radios. The apparatus includes a modulation/demodulation unit that modulates and demodulates signals from the plurality of the radio systems. The signal are compatible are orthogonal frequency division multiplexed and are spread.

Radio communication apparatus, method and program

An apparatus includes a converter separating the OFDM signal into the several sub-carriers, an extraction circuit extracting the reference symbol from at least one of a plurality of sub-carriers, an estimation circuit estimating a transmission distortion channel every the sub-carrier based on the amplitude and phase characteristic of the reference symbol, an adder adding channel estimation results of a first sub-carrier be set at least one of the plurality of sub-carriers, a second sub-carrier adjacent to a high-band side of the first sub-carrier and a third sub-carrier adjacent to a low-band side of the first sub-carrier, a calculator calculating the average of the added value to obtain amplitude and phase correction values with respect to the first sub-carrier, and a correction circuit correcting amplitude and phase with respect to each of the plurality of sub-carriers based on the amplitude and phase correction values.

OFDM signal receiving apparatus and an OFDM signal receiving method

A mobile radio communication apparatus comprises a wireless transmitter-receiver device configured to perform transmission/reception of a radio signal, a signal processing device including a resource to which functions are defined, wherein the resource handles at least a modem function and a protocol function, and configured to perform a signal processing necessary in the transmission/reception by use of the resource, and a controller that controls the signal processing device to redefine, to the resource, another modem function and another protocol function corresponding to respective one of the mobile communication systems.

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Yokohama, Japan

Jun Mitsugi