Abstract: A wireless apparatus for determining a phase difference of a received RF signal, and method. The apparatus includes antennas displaced from each other by a predetermined distance for receiving an RF signal. The apparatus also includes an exclusive OR (EXOR) circuit comparing binary signals derived from the received RF signal that are associated with respective antennas. An absolute phase difference is based on a pulse width of the comparison.

Abstract: An apparatus for determining a position of a mobile wireless station comprises means for determining the position of the mobile wireless station in accordance with a position of a first reference wireless station, a position of a second reference wireless station, a first relative angular direction between the mobile wireless station and the first reference wireless station, and a second relative angular direction between the mobile wireless station and the second reference wireless station.

Abstract: An apparatus for a wireless base station is adapted to communicate with a plurality of wireless terminals in a plurality of sectors and comprises a communication control unit, and a plurality of transceivers associated with the sectors, respectively. The transceivers have respective directive antennas associated with the respective sectors. During a first period of time, the communication control unit enables one or more of the plurality of transceivers that are associated with respective one or more of the plurality of sectors that are not adjacent to each other, to communicate with wireless terminals, and the communication control unit disables remaining one or more transceivers other than the enabled one or more transceivers, from communicating with wireless terminals.

Abstract: An information processing apparatus (2) has a contactless reader/writer (90), which includes a coil antenna (110) having a plurality of turns for transmitting and/or receiving an RF modulated carrier signal, by magnetic coupling. The coil antenna (110) is coupled to a transceiver (92) and is disposed in a space within a case (10) between an electric shield (70) and a casing (78) of the case (10). The coil antenna (110) is wound about one center axis (C1) over a predetermined length (L1) to have a generally tubular shape of a predetermined diameter and a predetermined number (N1) of turns, and has a coil plane (P1) at one end of the predetermined length. The electric shield does not have any part present between the part of the casing facing the coil plane located on the one center axis and the electric shield (70), and the outer side portion of the coil antenna (110) is disposed, being spaced from said electric shield by a predetermined distance (dS2).

Abstract: An apparatus for determining a position of a mobile wireless station comprises means for determining the position of the mobile wireless station in accordance with a position of a first reference wireless station, a position of a second reference wireless station, a first relative angular direction between the mobile wireless station and the first reference wireless station, and a second relative angular direction between the mobile wireless station and the second reference wireless station.

Abstract: There is provided a radio interrogator system which reduces the interference with a radio transponder and avoids the decrease in throughput of the entire system in a case in which a plurality of radio interrogators are disposed at positions brought relatively close to each other and are simultaneously placed into operation. The plurality of radio interrogators are classified into two groups and each of the radio interrogators has an operation mode setting unit capable of exclusively setting, for each of the classified groups, a transmission mode for transmitting a radio transmission signal to a radio transponder or a reception mode for receiving a radio response signal transmitted from the radio transponder as a response to a radio transmission signal from the radio interrogator.

Abstract: An apparatus for determining a position of a mobile wireless station comprises means for determining the position of the mobile wireless station in accordance with a position of a first reference wireless station, a position of a second reference wireless station, a first relative angular direction between the mobile wireless station and the first reference wireless station, and a second relative angular direction between the mobile wireless station and the second reference wireless station.

Abstract: An apparatus for determining a position of a mobile wireless station comprises means for determining the position of the mobile wireless station in accordance with a position of a first reference wireless station, a position of a second reference wireless station, a first relative angular direction between the mobile wireless station and the first reference wireless station, and a second relative angular direction between the mobile wireless station and the second reference wireless station.

Abstract: An apparatus for determining a position of a mobile wireless station comprises means for determining the position of the mobile wireless station in accordance with a position of a first reference wireless station, a position of a second reference wireless station, a first relative angular direction between the mobile wireless station and the first reference wireless station, and a second relative angular direction between the mobile wireless station and the second reference wireless station.

Abstract: An apparatus for determining a position of a mobile wireless station comprises means for determining the position of the mobile wireless station in accordance with a position of a first reference wireless station, a position of a second reference wireless station, a first relative angular direction between the mobile wireless station and the first reference wireless station, and a second relative angular direction between the mobile wireless station and the second reference wireless station.

Abstract: An RFID transceiver device is proposed capable of carrier sensing even when the difference with respect to the carrier frequency employed by the other system is close to “0”.

Abstract: An RFID transceiver device is capable of high sensitivity reception, by the reduction of noise, irrespective of the distance to the tag. The RFID transceiver device includes a delay circuit between a local oscillation circuit and a demodulation circuit, wherein the amount of delay of the delay circuit is set to a magnitude corresponding to the path difference between the path of leakage, via a duplexer into the demodulation circuit, of transmission signal output from the local oscillation circuit for transmission, and the path of direct input of the local oscillation signal from the local oscillation circuit to the demodulation circuit.

Abstract: An information processing apparatus (2) has a contactless reader/writer (90), which includes a coil antenna (110) having a plurality of turns for transmitting and/or receiving an RF modulated carrier signal, by magnetic coupling. The coil antenna (110) is coupled to a transceiver (92) and is disposed in a space within a case (10) between an electric shield (70) and a casing (78) of the case (10). The coil antenna (110) is wound about one center axis (C1) over a predetermined length (L1) to have a generally tubular shape of a predetermined diameter and a predetermined number (N1) of turns, and has a coil plane (P1) at one end of the predetermined length. The electric shield does not have any part present between the part of the casing facing the coil plane located on the one center axis and the electric shield (70), and the outer side portion of the coil antenna (110) is disposed, being spaced from said electric shield by a predetermined distance (ds2).

Abstract: A system establishes synchronicity of transmission and receiving for each reader/writer of an RF tag independently without obtaining synchronization of the reader/writers by means of an unspecified number of control terminals is desired as a reader/writer system. A reader/writer comprises a transmitter operable to transmit an interrogation signal to an RF tag, and a receiver operable to receive a response signal from an RF tag, wherein the transmitter is operable to transmit an interrogation signal based on a synchronization signal received from another reader/writer.

Abstract: An information processing apparatus communicates with a separate passive device, to receive specific information from the separate device. The information processing apparatus includes an antenna, a transmitter and a receiver both coupled to the antenna, and a control unit for controlling the transmitter. The control unit causes the transmitter to transmit a signal at a low transmission power and waits for reception by the receiver of a response signal from the separate device. When the specific information is detected in the response signal, the control unit causes the transmitter to transmit a signal at a high transmission power by raising the transmission power of the transmitter, to thereby enable information to be read from or written to the separate device.

Abstract: A portable terminal includes a wireless public network communication portion for performing communication via a wireless public network, a short distance wireless communication portion for performing direct wireless communication with a terminal that exists within a short distance area, a communication history memory portion for storing a history of communication performed by using the wireless public network communication portion and a control portion for controlling each portion. The control portion searches other portable terminals that exist within the short distance area by using the short distance wireless communication portion, refers the communication history memory portion of each other with a found portable terminal, and informs a user of approach of the other end by using information means if there is a communication history with the other end exists in the communication history memory portion of each end.

Abstract: A wireless communication device (2), which is connected to a server (4) for providing information via a network (3) and is disposed at an access point for relaying information provision service by the server (4) to a portable terminal (1) having a short distance wireless communication function, includes a network interface (26) for connecting to the network (3), a wireless communication interface (21) for the short distance wireless communication with the portable terminal (1), a connection information exchange portion (25) for exchanging connection information for communication establishment with the portable terminal (1) prior to the short distance wireless communication with the portable terminal (1), and a wireless communication management portion (24) for controlling the exchange process of the connection information by the connection information exchange portion (25) and the communication establishment process with the portable terminal (1).

Abstract: An apparatus for a wireless base station is adapted to communicate with a plurality of wireless terminals in a plurality of sectors and comprises a communication control unit, and a plurality of transceivers associated with the sectors, respectively. The transceivers have respective directive antennas associated with the respective sectors. During a first period of time, the communication control unit enables one or more of the plurality of transceivers that are associated with respective one or more of the plurality of sectors that are not adjacent to each other, to communicate with wireless terminals, and the communication control unit disables remaining one or more transceivers other than the enabled one or more transceivers, from communicating with wireless terminals.

Abstract: An apparatus for determining a position of a mobile wireless station comprises means for determining the position of the mobile wireless station in accordance with a position of a first reference wireless station, a position of a second reference wireless station, a first relative angular direction between the mobile wireless station and the first reference wireless station, and a second relative angular direction between the mobile wireless station and the second reference wireless station.

Abstract: A single antenna is used so that time-division transmission and reception is carried out in a radar apparatus for obtaining a distance and a relative speed with respect to a target object based on a beat signal obtained by transmitting a frequency modulated signal and mixing a received signal reflected by said target object with the frequency modulated signal that is transmitted.