摘要:
A copper alloy material having: 1.0 to 5.0 mass % of Ni; 0.2 to 1.0 mass % of Si; 1.0 to 5.0 mass % of Zn; 0.1 to 0.5 mass % of Sn; 0.003 to 0.3 mass % of P; and the balance consisting of Cu and an unavoidable impurity. The mass ratio between Ni and each of Si, Zn and Sn is to be Ni/Si=4 to 6, Zn/Ni=0.5 or more, and Sn/Ni=0.05 to 0.2.
摘要翻译:具有1.0〜5.0质量%的Ni的铜合金材料; Si:0.2〜1.0质量% 1.0〜5.0质量%的Zn; Sn:0.1〜0.5质量% 0.003〜0.3质量% 余量由Cu和不可避免的杂质组成。 Ni与Si,Zn,Sn的质量比为Ni / Si = 4〜6,Zn / Ni = 0.5以上,Sn / Ni = 0.05〜0.2。
摘要:
There is provided a communication device including a first communicating unit, a second communicating unit that has a plurality of antennas, a first communication processing unit that processes a signal received by the first communicating unit, allows the first communicating unit to transmit a signal, and a second communication processing unit that processes a signal received by the second communicating unit, allows the second communicating unit to transmit a signal. The second communication processing unit includes an adjusting unit that adjusts a signal to be transmitted from each of the plurality of antennas based on an adjustment factor, a transmission beam pattern candidate setting unit that derives at least one transmission beam pattern based on a first transmission request and a second transmission request, and a beam pattern applying unit that applies any of the set at least one transmission beam pattern candidate based on first requested-beam-pattern identification information.
摘要:
Reversibility in the directivity in the event of transmission/reception through a multi-antenna system is well suitably compensated for by executing self-calibration. A branch is set to a reference branch, and a forward loopback transfer function and a backward loopback transfer function are acquired, whereby per-branch calibration factors are calculated. Subsequently, an other branch is set to a reference branch, and calibration factors are calculated in a similar manner. Then, the calibration factor for the reference branch is corrected in accordance with the secondly obtained calibration factor so that a calibration condition is satisfied.
摘要:
A communication system for carrying out data communication among a plurality of communication stations is disclosed in which a first communication station for transmitting to other communication stations a Request To Send (RTS) signal for requesting a transmission upon the start of the data transmission; and a plurality of second communication stations transmitting to other communication stations a Clear To Send (CTS) signal for notifying the completion of preparing the reception, wherein the first communication station transmits the RTS signal describing at least each of addresses the second communication stations that are desired to receive the data, and receives a plurality of CTS signals transmitted from each of the second communication stations in order to increase communication capacity.
摘要:
A wireless communication apparatus includes: plural antennas; a channel matrix acquiring unit acquiring a channel matrix for each sub-carrier; a channel matrix encoding unit encoding the acquired channel matrix of each sub-carrier, by decomposition from signals in fixed-point representation into data and amplitude parts with a predetermined bit width; and a channel matrix information delivery unit delivering the encoded channel matrix information to a communication party. The encoding unit retrieves a first maximum value as the maximum of channel matrix elements in all sub-carriers, in plural levels, and determines an amplitude part and a normalization coefficient for normalizing channel matrix elements to a data part having the predetermined bit width, based on a ratio between a second maximum value as the maximum of channel matrix elements with respect to each sub-carrier and the first maximum value, and multiples channel matrix elements by the normalization coefficient to obtain a data part.
摘要:
There is provided a signal processor with a plurality of antennas connected for transmitting and receiving wireless signals, including a plurality of analog reception processing units, AD converters, DA converters, and analog transmission processing units, wherein each of the analog reception processing units converts the wireless signal received through the antenna into an analog baseband signal and outputs the signal to the AD converter, each of the DA converters converts the digital baseband signal into analog format and outputs the signal, and each of the analog transmission processing units shifts the frequency band of the analog baseband signal output from the DA converter to the high frequency side. The signal processor further includes a transmission switch which switches among the DA converters respectively connected to the analog transmission processing units and a reception switch which switches among the AD converters respectively connected to the analog reception processing units.
摘要:
A communication system for carrying out data communication among a plurality of communication stations is disclosed in which a first communication station for transmitting to other communication stations a Request To Send (RTS) signal for requesting a transmission upon the start of the data transmission; and a plurality of second communication stations transmitting to other communication stations a Clear To Send (CTS) signal for notifying the completion of preparing the reception, wherein the first communication station transmits the RTS signal describing at least each of addresses the second communication stations that are desired to receive the data, and receives a plurality of CTS signals transmitted from each of the second communication stations in order to increase communication capacity.
摘要:
Provided is a photoelectric-cell device including a power-source unit arranged between a ground line and a power-source line for generating photo-electromotive force and applying state information to the power-source line, and also including an inverter for converting a direct-current power source into a predetermined one and communicating with the unit via the power-source line. A power-source module of the unit includes a photoelectric-cell module, a bypass diode, a state detector, a communication unit, and a communication controller. The photoelectric-cell module includes cells for generating photo-electromotive force, first/second terminals on the ground-line/power-source-line sides, respectively. The anode of the diode is connected to the first terminal, and the cathode to the second terminal. The detector detects a state of each power-source module. The communication unit applies the information to the power-source line. The controller controls the communication unit to apply the information selectively, based on an information request from the inverter.
摘要:
A wireless communication method, a base station and a wireless communication device. The wireless communication method includes: in case that communication devices which are to perform communication are estimated to satisfy a condition for device-to-device direct communication, transmitting a control signaling from a base station to the communication devices, the control signaling allocating a carrier for the device-to-device direct communication; and performing the device-to-device direct communication between the communication devices using the allocated carrier, wherein the base station allocates the carrier for the device-to-device direct communication from conventional carrier, stand-alone new-type carrier and non-stand-alone new-type carrier, wherein the new-type carrier has a reduced number of control channels as compared with the conventional carrier.
摘要:
A communication system for carrying out data communication among a plurality of communication stations is disclosed in which a first communication station for transmitting to other communication stations a Request To Send (RTS) signal for requesting a transmission upon the start of the data transmission; and a plurality of second communication stations transmitting to other communication stations a Clear To Send (CTS) signal for notifying the completion of preparing the reception, wherein the first communication station transmits the RTS signal describing at least each of addresses the second communication stations that are desired to receive the data, and receives a plurality of CTS signals transmitted from each of the second communication stations in order to increase communication capacity.