Abstract: A wireless device, method, and signal for use in communication of a wireless packet between transmitting device and a wireless receiving device via a plurality of antennas, wherein a signal generator generates wireless packet including a short-preamble sequence used for a first automatic gain control (AGC), a first long-preamble sequence, a signal field used for conveying a length of the wireless packet, an AGC preamble sequence used for a second AGC to be performed after the first AGC, a second long-preamble sequence, and a data field conveying data. The AGC preamble sequence is transmitted in parallel by the plurality of antennas.

Abstract: Before data is transmitted from a plurality of antennas, a plurality of known symbol sequences are transmitted from these antennas. Each known symbol sequence contains a plurality of known symbols having different subcarrier arrangements. Known symbols transmitted from different antennas have different subcarrier arrangements.

Abstract: A wireless transmission device which communicates with a wireless reception device is provided with a transmission-signal-generating unit configured to generate, transmission signals having transmission rates arranged in order corresponding to an input order of data items of the information sequence. The transmission device is also provided with a preamble adder which adds, to the transmission signals, respective preamble signals assigned in order of the transmission rates and used for estimation of channel responses at the wireless reception device. The transmission device is further provided with transmission units configured to transmit the transmission signals with the preamble signals added thereto.

Abstract: A wireless communication apparatus includes a plurality of antennas, transmits a plurality of known symbol sequences each including a plurality of known symbols by using the antennas, each of the known symbols having subcarrier arrangement on which plural known information of the each of the known symbols are carried on, and inversion/non-inversion of a phase of known information on one of two adjacent subcarriers of the subcarrier arrangement being controlled in accordance with the number of the known symbols and time position of the each of the known symbols, and transmits data symbols by using the antennas after the known symbol sequences are transmitted.

Abstract: A wireless communication apparatus having a plurality of antennas for transmitting a known symbol by using a plurality of subcarriers to a receiver, the known symbol including known information, the apparatus includes each of the subcarriers which carries the known information being classified into at least two groups, and a phase control unit configure to control inversion/non-inversion of a phase of the known information carried on two subcarriers which belong to the same group in accordance with notification information to be notified to the receiver.

Abstract: A sock that has a bulge portion (11) extending vertically of the toes that, in the intermediate portion of a toe portion (10) covering the toes, is disposed in the instep (10b) and/or sole (10a) of the foot, whereby when the toes are inserted in the toe portion (10), the bulge portion (11) allows the toe portion (10) to deform easily along the toes, thus making the insertion of the toes smooth at the time of wearing and, on completion of wearing, providing room around the toes by the bulge portion (11) so as to avoid a feeling of excessive tightening.

Abstract: A wireless device, method, and signal for use in communication of a wireless packet between transmitting device and a wireless receiving device via a plurality of antennas, wherein a signal generator generates wireless packet including a short-preamble sequence used for a first automatic gain control (AGC), a first long-preamble sequence, a signal field used for conveying a length of the wireless packet, an AGC preamble sequence used for a second AGC to be performed after the first AGC, a second long-preamble sequence, and a data field conveying data. The AGC preamble sequence is transmitted in parallel by the plurality of antennas.

Abstract: A wireless communication apparatus includes a plurality of antennas, transmits a plurality of known symbol sequences each including a plurality of known symbols by using the antennas, each of the known symbols having subcarrier arrangement on which plural known information of the each of the known symbols are carried on, and inversion/non-inversion of a phase of known information on one of two adjacent subcarriers of the subcarrier arrangement being controlled in accordance with the number of the known symbols and time position of the each of the known symbols, and transmits data symbols by using the antennas after the known symbol sequences are transmitted.

Abstract: A wireless communication system includes first and second wireless terminals capable of performing transmission by at least one of a first transmission scheme and a second transmission scheme. The first wireless terminal performs transmission of a first frame to the second wireless terminal by using the second transmission scheme. The second wireless terminal communicates with the first wireless terminal to notify the first wireless terminal of information associated with a status of the reception of the first frame transmitted from the first wireless terminal by using the first transmission scheme.

Abstract: A radio communication apparatus compatible with a plurality of communication systems and application services comprises a radio transmitting/receiving unit for transmitting and receiving a radio signal, signal processing circuit for executing part of digital signal processing which may be executed when a radio signal is transmitted or received, first processors connected to the signal processing circuit for at least executing communication control related to connection between the radio communication apparatus and the communication systems, and an application program related to the application services, and second processors connected to the signal processing circuit for at least executing another part of the digital signal processing, and control of the signal processing circuit, the amount of processing of the second processors being greater than the amount of processing of the first processors, the processing concerning the executing unit.

Abstract: Before data is transmitted from a plurality of antennas, a plurality of known symbol sequences are transmitted from these antennas. Each known symbol sequence contains a plurality of known symbols having different subcarrier arrangements. Known symbols transmitted from different antennas have different subcarrier arrangements.

Abstract: A vinyl chloride resin composition comprising 100 parts by mass of a vinyl chloride resin and a co-ground mixture of (a) 0.001 to 10 parts by mass of at least one member selected from the group consisting of an organic phosphoric ester compound and a metal salt thereof and (b) 0.001 to 10 parts by mass of a grinding aid. The composition is excellent in transparency, heat stability, and heat discoloration resistance.

Abstract: In a wireless communication system having a wireless base station, wireless terminal stations belonging to a first group which performs wireless communication while sharing different frequency channels, and wireless terminal stations belonging to a second group which performs wireless communication by using one frequency channel, a first communication period and a second communication period is alternately repeated. In this system, a wireless terminal station belonging to the first or the second group communicates with the wireless base station by using a first frequency channel in the first communication period. Direct communication between two wireless terminal stations belonging to the first group by using a second frequency channel without through the wireless base station is performed in the first communication period. Then, a wireless terminal station belonging to the first group communicates with the wireless base station by using both the first and the second frequency channels.

Abstract: A radio communication apparatus compatible with a plurality of communication systems and application services comprises a radio transmitting/receiving unit for transmitting and receiving a radio signal, signal processing circuit for executing part of digital signal processing which may be executed when a radio signal is transmitted or received, first processors connected to the signal processing circuit for at least executing communication control related to connection between the radio communication apparatus and the communication systems, and an application program related to the application services, and second processors connected to the signal processing circuit for at least executing another part of the digital signal processing, and control of the signal processing circuit, the amount of processing of the second processors being greater than the amount of processing of the first processors, the processing concerning the executing unit.

Abstract: 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.

Abstract: A communication apparatus generates a single physical frame including a plurality of MAC frames, and transmits the physical frame. The physical frame has variable-length bitmap information comprising bits corresponding to the plurality of MAC frames, respectively, and length information of the bitmap information.

Abstract: There is disclosed a wireless communication apparatus using any of a plurality communication bands. A detection device detects a cyclic interference with a first communication band of the plurality of communication bands. An assignment device assigns the first communication band to an extension channel and assigns a second communication band of the plurality of communication bands to a control channel, when the cyclic interference has been detected by the detection device. Accordingly, a communication device performs wireless communication using the control channel and the extension channel.

Abstract: Radio communication system includes terminal including unit detecting radar wave transmitted through second-frequency channel, first-and-second-frequency channels through which radar wave fails to be transmitted being simultaneously utilized or one of first-and-second-frequency channels being utilized, unit generating radar-detection information including information indicating detection time when detecting unit detects radar wave, and information indicating frequency channel through which radar wave is transmitted, and unit transmitting radar-detection information, and base station including unit receiving radar-detection information, unit generating radar-occurrence information based on received-radar-detection information, radar-occurrence information including information indicating occurrence time when radar wave occurs, information indicating period of occurrence of radar wave, and information indicating frequency channel through which radar wave is transmitted, and unit transmitting radar-occurrence in

Abstract: 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.

Abstract: In transmitting a wireless packet signal for channel response estimation, after AGC preambles and channel estimation preambles are transmitted by using a plurality of antennas, at least one data stream is transmitted, as subcarriers distributed to the plurality of antennas, by using the plurality of antennas.