Abstract: A burden for configurating optical transmission equipment is increased as capacity in an optical transmission system is increased. An optical control device according to the present invention includes a storage means for storing transmission characteristics information in advance, the transmission characteristics information relating to an optical transmission system that transmits signal light via an optical transmission line, a first connection means for receiving the signal light and test light having a wavelength different from that of the signal light, an optical modulation means for modulating the test light by using the transmission characteristics information, and generating test modulation light, and a second connection means for delivering the test modulation light.

Abstract: An electronic apparatus according to the present invention includes a substrate and an adapter, the substrate includes a flow path adjustment plate that adjusts a stream of gas in such a way that the gas flows in a first direction, and the adapter includes a first connector connectable, in a second direction perpendicular to the first direction, to the substrate, a second connector protruding in a direction parallel to the first direction, a circuit electrically connecting the first connector to the second connector, and a holding member holding the first connector, the second connector and the circuit, and being in contact with a part of a periphery of the substrate due to connection of the first connector to the substrate.

Abstract: The present invention allows a gain control to be appropriately effected even when a frame including no preamble signal block is used for wireless communications. The following processes are effected in a transmission power control unit 106 of a transmission unit. Specifically, an automatic transmission gain control unit 201 multiplies a transmission signal by a gain value that is the difference between the power of a signal loop-backed from a power amplifier 109 and the power of the transmission signal. A fixed transmission gain multiplying unit 202 multiplies the transmission signal by a predetermined gain value or by the gain value used in the automatic transmission gain control unit 201 during the preceding frame.

Abstract: [Problem] To propose a technology capable of appropriately demodulating, in a receiving device, a plurality of pieces of data multiplexed through the quasi-synchronous LDM method. [Solution] A transmission device generates a UL modulated signal by using an IFFT process of NUL points, generates an LL modulated signal by using an IFFT process of NLL points different from the NUL points, and transmits signals obtained by timing-adjusting the modulated signals such that the start timings thereof coincide with each other in a predetermined cycle, and combining the timing-adjusted signals at a predetermined power ratio. In addition, the receiving device performs an NUL point FFT process on the reception signal from the transmitting device, reproduces UL and generates UL reception replica, on the basis of the result, and performs an NLL point FFT process on a signal obtained by subtracting the UL reception replica from the reception signal, and reproduces LL on the basis of the result.

Abstract: [Problem] To propose a technology capable of appropriately demodulating, in a receiving device, a plurality of pieces of data multiplexed through the quasi-synchronous LDM method. [Solution] A transmission device generates a UL modulated signal by using an IFFT process of NUL points, generates an LL modulated signal by using an IFFT process of NLL points different from the NUL points, and transmits signals obtained by timing-adjusting the modulated signals such that the start timings thereof coincide with each other in a predetermined cycle, and combining the timing-adjusted signals at a predetermined power ratio. In addition, the receiving device performs an NUL point FFT process on the reception signal from the transmitting device, reproduces UL and generates UL reception replica, on the basis of the result, and performs an NLL point FFT process on a signal obtained by subtracting the UL reception replica from the reception signal, and reproduces LL on the basis of the result.

Abstract: An optical transmitter includes: a plurality of client ports configured to receive a client signal from an end user device; a plurality of line ports configured to generate a line signal in which the client signal is stored, and transmit the line signal to an optical receiver; a switch configured to connect the plurality of client ports with the plurality of line ports; and a label provider configured to provide the client signal with a label for identifying a transmission destination in the optical receiver.

Abstract: To reduce the power consumption of an optical transponder, the optical transponder is provided with: a client interface which transmits and receives a client signal; a line interface provided with a signal processing circuit which performs signal processing for transporting the client signal using a digital coherent system, and an optical transceiver which converts between the client signal and an optical signal; and a control unit for controlling the operation of the signal processing circuit in accordance with the bandwidth of the client signal.

Abstract: In order to reduce the number of wires between blades, this blade device is provided with: a control blade for sending first information, which is at least one of control information for controlling a blade to be controlled and monitor information for monitoring the blade to be controlled, to the blade to be controlled by wireless communication; and the blade to be controlled which performs a process in accordance with the first information that has been received.

Abstract: There is provided a wireless communication system in which it is possible to transmit data with low delay by suppressing an increase in buffer capacity, while preventing the depletion of data within each buffer. A base station uses a relationship in which the sum of an amount of data stored in a buffer of a mobile station and an amount of data stored in a buffer of a base station is constant to determine a video coding rate and a wireless transmission rate on the basis of quality of a wireless propagation path measured by a propagation path quality measurement unit and the data amount stored in the buffer of the base station, transmits the determined rates to the mobile station, and causes the determined rates to be reflected in the settings of a video encoding unit and a wireless encoding unit.

Abstract: In a base station, a signal synchronization unit detects a received timing of a signal from a mobile station. A correlation position protection unit corrects the received timing on the basis of time from a transmitting timing at which a signal transmitting operation to the mobile station is started to the received timing. A transmitting timing generation unit generates, on the basis of the received timing after the correction, a transmitting timing at which a subsequent signal transmitting operation to the mobile station is started. Further, an FB frame generation unit generates frame period information that indicates a correction value by the correlation position protection unit, and a transmitting processing unit transmits, to the mobile station, a signal including the frame cycle information in response to the generation of the transmitting timing.

Abstract: In a base station, a signal synchronization unit detects a received timing of a signal from a mobile station. A correlation position protection unit corrects the received timing on the basis of time from a transmitting timing at which a signal transmitting operation to the mobile station is started to the received timing. A transmitting timing generation unit generates, on the basis of the received timing after the correction, a transmitting timing at which a subsequent signal transmitting operation to the mobile station is started. Further, an FB frame generation unit generates frame period information that indicates a correction value by the correlation position protection unit, and a transmitting processing unit transmits, to the mobile station, a signal including the frame cycle information in response to the generation of the transmitting timing.

Abstract: An optical transmitter includes: a plurality of client ports configured to receive a client signal from an end user device; a plurality of line ports configured to generate a line signal in which the client signal is stored, and transmit the line signal to an optical receiver; a switch configured to connect the plurality of client ports with the plurality of line ports; and a label provider configured to provide the client signal with a label for identifying a transmission destination in the optical receiver.

Abstract: In order to reduce the number of wires between blades, this blade device is provided with: a control blade for sending first information, which is at least one of control information for controlling a blade to be controlled and monitor information for monitoring the blade to be controlled, to the blade to be controlled by wireless communication; and the blade to be controlled which performs a process in accordance with the first information that has been received.

Abstract: A communication device configured to include a communication unit a monitoring unit, a control unit, and an authentication unit. The communication unit transmits and receives an optical signal to and from an opposed device via a transmission line. The monitoring unit monitors a transfer state of the transmitted optical signal. The control unit transmits a signal based on a dummy pattern instead of actual data when the monitoring unit detects that a failure occurs in transfer of the optical signal. The authentication unit authenticates start of transmission of a signal based on the actual data, when the monitoring unit detects elimination of the failure, while the signal based on the dummy pattern is being transmitted. Moreover, the control unit transmits the signal based on the actual data instead of the dummy pattern when the start of transmission is authenticated by the authentication unit.

Abstract: A terminal apparatus (1) is provided with a coding unit (7), a decoding unit (2), and a control unit (5) for controlling the coding unit and the decoding unit individually. Under control of the control unit, the coding unit codes a payload, a first number of error corrections (3), and identification information (6) that are to be transmitted, on the basis of a method indicated by the already-transmitted identification information to thereby generate first coded data. The decoding unit decodes newly-received second coded data on the basis of a method indicated by the identification information included in a decoding result of the already-received second coded data.

Abstract: A reception device including reception antennas is provided. In the reception device, a demodulation unit is configured to calculate, for each of a plurality of antenna combinations of the reception antennas, log likelihood ratios of coded bits of error correction code obtained from reception signals of the reception antennas. A mutual information amount calculation unit is configured to calculate an average mutual information amount based on the log likelihood ratios corresponding to each of the antenna combinations. An antenna combination selection unit is configured to output determination information for specifying one of the antenna combinations for which the average mutual information amount is the maximum. A signal selection unit is configured to select the log likelihood ratios corresponding to the specified antenna combination based on the determination information, and a decoding unit is configured to decodes the selected log likelihood ratios.

Abstract: A reception device including reception antennas is provided. In the reception device, a demodulation unit is configured to calculate, for each of a plurality of antenna combinations of the reception antennas, log likelihood ratios of coded bits of error correction code obtained from reception signals of the reception antennas. A mutual information amount calculation unit is configured to calculate an average mutual information amount based on the log likelihood ratios corresponding to each of the antenna combinations. An antenna combination selection unit is configured to output determination information for specifying one of the antenna combinations for which the average mutual information amount is the maximum. A signal selection unit is configured to select the log likelihood ratios corresponding to the specified antenna combination based on the determination information, and a decoding unit is configured to decodes the selected log likelihood ratios.

Abstract: A peak power reduction device includes a unit for dividing digital information to be transmitted into a plurality of streams; a unit for selecting the modulation level of the streams and distribution of transmission power according to a transmission state; a unit for performing singular-value decomposition on the transmission path characteristic of a streams and precoding the resultant data by a right singular value matrix; a unit for performing complex mapping on the subcarrier of a stream according to the modulation level; a unit for converting a complex mapping signal into a time domain signal; a first unit for storing a conversion result as a time domain signal; a second unit for calculating a peak time signal exceeding a predetermined threshold value from a peak value, if any exists, that exceeds a prescribed threshold value for the amplitude of the time domain signal.

Abstract: A communication device configured to include a communication unit a monitoring unit, a control unit, and an authentication unit. The communication unit transmits and receives an optical signal to and from an opposed device via a transmission line. The monitoring unit monitors a transfer state of the transmitted optical signal. The control unit transmits a signal based on a dummy pattern instead of actual data when the monitoring unit detects that a failure occurs in transfer of the optical signal. The authentication unit authenticates start of transmission of a signal based on the actual data, when the monitoring unit detects elimination of the failure, while the signal based on the dummy pattern is being transmitted. Moreover, the control unit transmits the signal based on the actual data instead of the dummy pattern when the start of transmission is authenticated by the authentication unit.

Abstract: A peak power reduction device includes a unit for dividing digital information to be transmitted into a plurality of streams; a unit for selecting the modulation level of the streams and distribution of transmission power according to a transmission state; a unit for performing singular-value decomposition on the transmission path characteristic of a streams and precoding the resultant data by a right singular value matrix; a unit for performing complex mapping on the subcarrier of a stream according to the modulation level; a unit for converting a complex mapping signal into a time domain signal; a first unit for storing a conversion result as a time domain signal; a second unit for calculating a peak time signal exceeding a predetermined threshold value from a peak value, if any exists, that exceeds a prescribed threshold value for the amplitude of the time domain signal.