Abstract: A signal forwarding system includes: a plurality of signal forwarding devices forming a plurality of communication routes between a slave station and a master station; and a route control device that determines a communication route, wherein the route control device includes at least: a communication route calculation unit that calculates a communication route in response to a route switching request; and a forward destination setting instruction unit that outputs forward destination setting information based on the communication route, the signal forwarding devices include at least: a forward destination setting instruction acquisition unit that acquires the forward destination setting information; a forward destination set unit that changes a forward destination based on the forward destination setting information; and a forward unit that outputs input traffic based on the forward destination, and any of the route control device and the signal forwarding devices includes: a traffic monitor unit; a non-signa

Abstract: A communication device includes: a function of receiving an information packet transmitted from a base station; a communication function of connecting to a local network for sharing information among a plurality of terminals; a function of generating a parity packet; a function of multicasting the generated parity packet and identification information of all source packets to the local network; a function of receiving the parity packet multicast by other terminals and the identification information of all source packets via the local network; a function of storing the received parity packet and the identification information of all source packets in a storage unit; and a function of recovering a lost packet using the parity packet and the identification information of all source packets.

Abstract: Provided is a communication apparatus including: an encoder with a plurality of channels configured to encode an input stream while switching a rate of output data in at least two stages; and a wireless communication apparatus that transfers output of the encoder to a terminal by way of a wireless communication network, in which, when a channel is selected at the terminal, output of the encoder is switched from a low-rate stream to a high-rate stream such that the high-rate stream is transmitted to the terminal at which the channel has been selected.

Abstract: Provided is a communication apparatus including: an encoder with a plurality of channels configured to encode an input stream while switching a rate of output data in at least two stages; and a wireless communication apparatus that transfers output of the encoder to a terminal by way of a wireless communication network, in which, when a channel is selected at the terminal, output of the encoder is switched from a low-rate stream to a high-rate stream such that the high-rate stream is transmitted to the terminal at which the channel has been selected.

Abstract: A communication device includes: a function of receiving an information packet transmitted from a base station; a communication function of connecting to a local network for sharing information among a plurality of terminals; a function of generating a parity packet; a function of multicasting the generated parity packet and identification information of all source packets to the local network; a function of receiving the parity packet multicast by other terminals and the identification information of all source packets via the local network; a function of storing the received parity packet and the identification information of all source packets in a storage unit; and a function of recovering a lost packet using the parity packet and the identification information of all source packets.

Abstract: There is provided a sonic wave output device comprising, a receiving unit to receive wireless signals transmitted from a certain signal source, a determination unit to determine a parameter value depending on a location of the signal source using the wireless signals received by the receiving unit and a sonic wave output unit to output sonic waves with directionality toward a direction of the signal source based on the parameter value.

Abstract: There is provided a receiving apparatus including a plurality of receiving antennas, each of which receives a radio signal in which sub-carriers of different frequencies are multiplexed, a phase calculation unit that calculates a phase difference of each radio signal received by the plurality of receiving antennas from that of a reference signal for each of the sub-carriers contained in the radio signals, and a path difference calculation unit that calculates a path difference, which is a difference of distances from a transmitting antenna from which the radio signals are transmitted to any two receiving antennas of the plurality of receiving antennas, based on the phase difference calculated by the phase calculation unit.

Abstract: There is provided a communication device including: a receiving unit that receives radio signals transmitted from another communication device using a plurality of transmitting antennas by a plurality of receiving antennas; an estimation unit that estimates a range of a position where said another communication device possibly exists based on a phase of each radio signal received by the receiving unit and antenna spacing between the transmitting antennas; and a position determination unit that determines an existing position of said another communication device within the range estimated by the estimation unit.

Abstract: There is provided a communication device including: a receiving unit that receives radio signals transmitted from another communication device using a plurality of transmitting antennas by a plurality of receiving antennas; an estimation unit that estimates a range of a position where said another communication device possibly exists based on a phase of each radio signal received by the receiving unit and antenna spacing between the transmitting antennas; and a position determination unit that determines an existing position of said another communication device within the range estimated by the estimation unit.

Abstract: There is provided a sonic wave output device comprising, a receiving unit to receive wireless signals transmitted from a certain signal source, a determination unit to determine a parameter value depending on a location of the signal source using the wireless signals received by the receiving unit and a sonic wave output unit to output sonic waves with directionality toward a direction of the signal source based on the parameter value.

Abstract: A receiving apparatus is provided that includes a plurality of antennas, a phase difference calculation unit to calculate a phase difference of a received signal between the plurality of antennas, a difference calculation unit to calculate a difference between the phase difference of a previous received signal and the phase difference of a new received signal calculated by the phase difference calculation unit, and a moving angle estimation unit to estimate a moving angle of a transmitting apparatus from the difference in phase difference calculated by the difference calculation unit.

Abstract: There is provided a receiving apparatus including a plurality of receiving antennas, each of which receives a radio signal in which sub-carriers of different frequencies are multiplexed, a phase calculation unit that calculates a phase difference of each radio signal received by the plurality of receiving antennas from that of a reference signal for each of the sub-carriers contained in the radio signals, and a path difference calculation unit that calculates a path difference, which is a difference of distances from a transmitting antenna from which the radio signals are transmitted to any two receiving antennas of the plurality of receiving antennas, based on the phase difference calculated by the phase calculation unit.

Abstract: The number of times for averaging operation for averaging a correlation value of a received signal and a reference signal is properly controlled. When the correlation value is not averaged, since a lower limit value TH_A of a correlation level of a distribution of timings of which a path exists is larger than an upper limit value TH_B of a correlation level of a distribution of timings of which a path does not exist, the correlation value of a path is hidden by noise. Since the averaging operation is repeated until the relation of TH_A>TH_B is satisfied, the averaging operation is stopped when the relation is satisfied. The TH_A and TH_B are decided in accordance with RSCP and ISCP of a pilot channel and RSSI of a received base band signal.

Abstract: The number of times for averaging operation for averaging a correlation value of a received signal and a reference signal is properly controlled. When the correlation value is not averaged, since a lower limit value TH_A of a correlation level of a distribution of timings of which a path exists is larger than an upper limit value TH_B of a correlation level of a distribution of timings of which a path does not exist, the correlation value of a path is hidden by noise. Since the averaging operation is repeated until the relation of TH_A>TH_B is satisfied, the averaging operation is stopped when the relation is satisfied. The TH A and TH_B are decided in accordance with RSCP and ISCP of a pilot channel and RSSI of a received base band signal.

Abstract: In a CDMA-system based mobile station or an equivalent, to provide a high-precision measurement of a fading pitch without using a plurality of branches (antennas) for receiving a plurality of reception waves which may appear to have no correlation to one another, a plurality of despreading devices 5a, 5b, 5c, 5d connected to a shared reception system is provided for performing despreading for each multipath. Signals outputted from the plurality of despreading devices 5a, 5b, 5c, 5d are synthesized with a phase difference in each multipath being maintained by a first synthesizer 6 to obtain a synthesized signal.