Abstract: An information providing apparatus has a first communication part to perform communication with a communication apparatus, a main-information storage to store main information to be transmitted to the communication apparatus via the first communication part, a sub-information acquisition part to acquire sub-information reproducible separately from the main information and related to the main information, and a communication controller to control so that the main information and the corresponding sub-information is transmitted from the first communication part to the communication apparatus, when a transmission request for the main information is acquired from the communication apparatus.

Abstract: Apparatus for content distribution includes a distribution processor configured to distribute first data to a terminal of a visitor at a first site of an event, the first data comprising first information regarding a content related to the event and a content distribution processor configured to distribute, at a second site other than the first site, the content to the terminal when second data is determined as valid in relation to the first data by the content distribution processor, the second data originating from the terminal and comprising second information.

Abstract: A wireless communication device has a first wireless communication unit capable of performing wireless communication within a first communication distance, a second wireless communication unit capable of performing wireless communication within a second communication distance greater than the first communication distance, and a controller configured to assign at least a part of the wireless communication performed by the second wireless communication unit to the first wireless communication unit instead of the second wireless communication unit, based on a communication history of the second wireless communication unit stored after the wireless communication using the first wireless communication unit becomes available.

Abstract: According to one embodiment, when a control unit is notified of information in at least one second signal received by one of first and second wireless communication units after the control unit provides the second wireless communication unit with a command to transmit a first signal containing first address information and before a waiting time elapses and when the at least one second signal contains second address information assigned to an authentication apparatus having received the first signal, then the control unit provides the first wireless communication unit with a command to transmit a third signal for a connection request with the second address information set in a destination address.

Abstract: A wireless device has a first information acquisition part to acquire first information when the wireless device passes through a first gate, a second information generator to generate second information necessary to acquire data, by using the first information, and a data acquisition part to acquire the data transmitted from a data providing apparatus through wireless communication, by using the second information.

Abstract: A wireless device has a first information acquisition part to acquire first information when a first gate is passed through, a second information generator to generate second information by using the first information, a third information acquisition part to acquire third information by a wireless communication using the second information and invalidate the third information after a predetermined time period is elapsed since the third information is acquired, and a service executing part to execute a service by using the third information. An area capable of acquiring the third information by the third information acquisition part is broader than an area capable of acquiring the first information by the first information acquisition part.

Abstract: There is provided a signal receiving apparatus including first to pth stage computers configured to apply, in a step-by-step manner, butterfly operations to 2N input values; and 2N registers configured to store values obtained by a p?1th stage computer wherein the pth stage computer includes (a) 2L butterfly operation circuits configured to transmit, from corresponding 2M output ports, values obtained by the butterfly operations based on values provided to 2M input ports and (b) 2L selecting circuits arranged corresponding to the butterfly operation circuits, each selecting circuit providing a value of a register corresponding to different one of 2L BFInOrder_i(j,t) (wherein, BFInOrder_i(j,t) denotes values obtained by converting BFOutOrder_i(j,t)=t+j*2(N?M)+i*2N?(M+L) or (2(N?(M+L))?1?t)+j*2(N?M)+i*2(N?(M+L)) expressed by base H to base 2M of (log2M 2N)?1 words, word-reversing the values converted to base 2M, and converting the word-reversed values to the base H).

Abstract: According to one embodiment, a frequency offset compensation apparatus includes a first estimation unit, a second estimation unit, a setting unit, a synthesis unit and a compensation unit. The first estimation unit estimates a first rotation. The second estimation unit estimates a second rotation. The setting unit sets a weighting factor for the second rotation to a first value if a received power is less than a threshold value, and sets the weighting factor for the rotation to a second value being smaller than the first value if the received power is not less than the threshold value. The synthesis unit calculates a compensation value. The compensation unit compensates for a frequency offset.

Abstract: A wireless communication device has a first wireless unit, a second wireless unit, a storage, a communication judging unit, a threshold value retaining unit configured to retain a threshold value used to judge whether or not to permit a switch from the first wireless unit to the second wireless unit, a remaining volume monitoring unit configured to judge, when the communication judging unit judges that the first wireless unit has disconnected communication, whether volume of remaining unreceived data to be incorporated into the data received by the first wireless unit before the disconnection of communication is smaller than the threshold value retained by the threshold value retaining unit, and a controller configured to start receiving the unreceived data by switching from the first wireless unit to the second wireless unit, when the volume of remaining unreceived data is judged to be small by the remaining volume monitoring unit.

Abstract: A wireless communication device has a plurality of wireless units each configured to cover a different wireless communication range and be capable of receiving data in the corresponding wireless communication range, a status information generator provided corresponding to the wireless unit utilized to receive data among the plurality of wireless units, in order to generate status information concerning the wireless communication range of the wireless unit utilized to receive the data, and a storage configured to store the status information in association with the data.

Abstract: In an embodiment, an electronic apparatus is mounted with a card unit including first and second devices driven with different driving voltages. The electronic apparatus includes: first and second voltage generating units, first and second control units. The first voltage generating unit generates a first driving voltage for driving the first device and a second driving voltage for driving the second device using electric power from the battery. The second voltage generating unit generates the first driving voltage and second driving voltage using electric power transmitted from the external device. The first control unit controls the first selection unit such that any one of the first driving voltage generated by the first voltage generating unit and the first driving voltage generated by the second voltage generating unit is selected depending on the electric power supply capability of the battery.

Abstract: According to an embodiment, a card device connected to a device includes a wireless communication unit configured to make wireless communication. The wireless communication unit includes an antenna configured to be arranged therein as being apart from at least one of side faces of the card device by a distance corresponding to not less than a wavelength of a wireless signal that is emitted from the wireless communication unit.

Abstract: According to one embodiment, a card device includes an authentication unit, a wireless communication unit, and a control unit. The authentication unit performs an authentication process with an external device via wired communication. The wireless communication unit performs wireless communication with the external device. The control unit controls the wireless communication unit to reduce radio waves radiated from the wireless communication unit when the control unit detects that the authentication process is being performed.

Abstract: According to one embodiment, a storage device includes a connector configured to be connected to an equipment; a wireless communication unit configured to transmit and receive data through wireless communication; an identification unit configured to identify the equipment connected to the connector; a storage unit configured to include, for each identified equipment, a restricted area accessible only by the identified equipment; and a controller configured to control the storage unit such that the data, which is received by the wireless communication unit when the equipment is connected to the connector, is written in the restricted area for the connected equipment.

Abstract: According to one embodiment, a frequency offset compensation apparatus includes a first estimation unit, a second estimation unit, a setting unit, a synthesis unit and a compensation unit. The first estimation unit estimates a first rotation. The second estimation unit estimates a second rotation. The setting unit sets a weighting factor for the second rotation to a first value if a received power is less than a threshold value, and sets the weighting factor for the rotation to a second value being smaller than the first value if the received power is not less than the threshold value. The synthesis unit calculates a compensation value. The compensation unit compensates for a frequency offset.

Abstract: There is provided a signal receiving apparatus including first to pth stage computers configured to apply, in a step-by-step manner, butterfly operations to 2N input values; and 2N registers configured to store values obtained by a p?1th stage computer wherein the pth stage computer includes (a) 2L butterfly operation circuits configured to transmit, from corresponding 2M output ports, values obtained by the butterfly operations based on values provided to 2M input ports and (b) 2L selecting circuits arranged corresponding to the butterfly operation circuits, each selecting circuit providing a value of a register corresponding to different one of 2L BFInOrder_i(j,t) (wherein, BFInOrder_i(j,t) denotes values obtained by converting BFOutOrder_i(j,t)=t+j*2(N?M)+i*2N?(M+L) or (2(N?(M+L))?1?t)+j*2(N?M)+i*2(N?(M+L)) expressed by base H to base 2M of (log2M 2N)?1 words, word-reversing the values converted to base 2M, and converting the word-reversed values to the base H).

Abstract: A vestigial sideband (VSB) modulation apparatus includes a signal processing unit which extracts an I-axis data signal component and a Q-axis data signal component from a baseband signal with symbol data superimposed thereon, a band-limiting filter which frequency-shifts the I-axis data signal component and the Q-axis data signal component, extracted by the signal processing unit, by only a specific frequency smaller than a rate of the symbol data and limits a passband width by a frequency width smaller than the rate of the symbol data, and a quadrature modulating unit which obtains a VSB modulation signal by quadrature-modulating the I-axis data signal component and the Q-axis data signal component output from the band-limiting filter.

Abstract: A vestigial sideband (VSB) modulation apparatus includes a signal processing unit which extracts an I-axis data signal component and a Q-axis data signal component from a baseband signal with symbol data superimposed thereon, a band-limiting filter which frequency-shifts the I-axis data signal component and the Q-axis data signal component, extracted by the signal processing unit, by only a specific frequency smaller than a rate of the symbol data and limits a passband width by a frequency width smaller than the rate of the symbol data, and a quadrature modulating unit which obtains a VSB modulation signal by quadrature-modulating the I-axis data signal component and the Q-axis data signal component output from the band-limiting filter.

Abstract: A transmitting apparatus converts a unit data item of the unit data items having a predetermined bit length into a time shift amount, stores, in a memory, a first symbol including a plurality of samples, generates a second symbol corresponding to the unit data item by cyclically shifting the samples in the first symbol by the time shift amount, and transmits the second symbol. A receiving apparatus receives two consecutive symbols each including a plurality of samples, detects sample values of the samples in each of the symbols, detects a time shift amount between the symbols based on the sample values of the samples in each of the symbols, and converts the time shift amount into a data item having the bit length.

Abstract: According to an aspect of the present invention, there is provided with an OFDM (Orthogonal Frequency Division Multiplexing) transmission apparatus, including: a subcarrier modulator configured to perform subcarrier modulation on a data sequence to generate subcarrier modulated signals; an IFFT unit configured to perform IFFT (Inverse Fast Fourier Transform) processing on the subcarrier modulated signals to generate a first OFDM symbol having a length corresponding to the number of FFT points at the IFFT processing; a symbol length shortener configured to obtain a part of the generated first OFDM symbol as a second OFDM symbol; and a transmitter configured to transmit the second OFDM symbol obtained to an other communication apparatus.