94results about How to "Guaranteed high-speed transmission" patented technology

A communication system has lighting equipment that has transmitter comprising multiple light-emitting elements that each emit light of different wavelengths and terminal equipment that has light-receiver comprising multiple light-receiving elements that receive optical signals for each of the different wavelengths.

An optical-electrical hybrid transmission cable (100), comprises an insulative layer (2); a shielding layer located on an inner side of the insulative layer; an optical cable (5) disposed in the shielding layer and comprising two optical fibers (51) and an insulative sheath (52) enclosing the two optical fibers; a pair of signal wires (6) twisted together and disposed in the shielding layer; and a pair of power wires disposed in the shielding layer. And the optical cable, the pair of signal wires and the pair of power wires are arranged along a circumferential direction.

An optical fiber, made of silica-based glass, comprising a core and a cladding. The optical fiber having a mode field diameter of 6.5 μm or larger at a wavelength of 1300 nm, transmitting light with a wavelength of 1250 nm in a single mode, and having a bending loss of 1 dB / turn or smaller at a wavelength of 1300 nm when the optical fiber is bent with a curvature radius of 1.5 mm.

An optical-electrical hybrid transmission cable (100), comprising: an insulative layer (2); a shielding layer located on an inner side of the insulative layer; a pair of signal wires (6) disposed in the shielding layer and twisted together; a power wire (7) and a grounding wire (8) disposed in the shielding layer and arranged side by side; two bare optical fibers (5) disposed in the shielding layer and spaced apart from each other; and a plurality of fillers (9) disposed in the shielding layer and arranged in a discrete manner.

An optical-electrical hybrid transmission cable (100), comprises: an insulative layer (2); a shielding layer (3) located on an inner side of the insulative layer; an optical cable (4) disposed in the shielding layer and comprising two optical fibers (41) and an insulative sheath (42) enclosing the two optical fibers; two coaxial cables (5), a power wire (6) and a grounding wire (7) disposed in the shielding layer; and a filler (8) disposed in a center of the optical-electrical hybrid transmission cable and surrounded by the two coaxial cables, the power wire, the grounding wire and the optical cable which are arranged along a circumferential direction.

An electronic policeman background intelligent management and automatic implementing system includes: a data processing working flow module and a data discovering module which are used for transmitting a data document from a data acquisition front end device to the background system which carries out automatic license plate identification, inquires about vehicle information and generates a traffic ticket; the data discovering module is used for inquiring, clearing up and statistics on the data, gives alarms to the vehicle owners breaking the law for a plurality of times and reasonably arranges the constabulary duties. The electronic policeman background intelligent management and automatic implementing system of the invention realizes automatization and intellectualization as well as builds a real time, accurate and effective transportation integrated management system which affects in a large scale in full aspects by carrying out coordination processing on the invention by dint of various advanced devices and technologies; thereby ensuring the traffic safety, reducing the working intensity of the policemen, releasing a large number of policemen used for processing emergencies and ensuring the safeties of human lives and properties, bringing benefits to traffic, society, economy, population, environment and technology and making contributions for building a harmonious society.

The present invention relates to the technical field of mobile communications. Provided are an indoor distribution system, a local unit and a remote unit designed to realize high-speed transmission of multipath signals while saving resources and avoiding the power supply difficulty of a remote unit. The indoor distribution system comprises a local unit (11) and a remote unit (12) connected via a single feeder cable; the local unit (11) comprises a local mixing part (111), and the remote unit (12) comprises a remote mixing part (121), the remote mixing part (121) being a passive component. The present invention is suitable for the network structure of mobile communication.

Provided is a single-mode optical fiber that propagates an optical signal at a wavelength of 1310 nm, in single-mode operation; has a mode field diameter of 6.6 μm or more at the wavelength of 1310 nm; and a macro bending loss of at most 0.1 dB / 10 turns with a bending radius of 7.5 mm at a wavelength of 1650 nm.

An indirect optical free-space communications system provides broadband transmission of high-speed data in in transportation vehicles such as aircraft. The system includes a transmitter with a light source that can be modulated and a receiver with a photo detector, adapted to receive light that is emitted from the transmitter and to convert it into an electric signal. The transmitter and the receiver are directed onto at least one common surface, which reflects the light emitted from the transmitter before it reaches the receiver. The free space communications system is cellular and includes several cells, each of which has a transmitter and at least one corresponding receiver. The cells are configured in such a way that crosstalk with a respective adjoining cell is prevented. The cells are thus independent of one another.

An output device is disclosed that includes an impedance matching section including an impedance adjustment section, and a dummy circuit section having the same configuration as the impedance adjustment section and adapted to calculate an adjustment value for matching an output impedance to a characteristic impedance of the transmission line. The impedance matching section sets the adjustment value to an impedance adjustment section, thereby matching the output impedance to the characteristic impedance. The output device further includes a switching transistor configured to be turned on / off so as to switch the output between an H level and an L level, and a constant current driver configured to add a constant current to the output.

It is possible to use a frequency of a preferable propagation condition while reducing the other cell interference by hopping. A scheduler section (102) performs scheduling for deciding a user to whom data is transmitted, by using the CQI from each communication terminal device, selects a user signal to be transmitted in the next frame, and decides a sub-carrier block by which the transmission is performed. An MCS judgment section (103) selects a modulation method and a coding method from the CQI of the user signal selected. A sub-carrier block selection section (110) selects a sub-carrier block specified by the scheduler section (102) for each user signal. For each of the sub-carrier blocks, the hopping pattern is selected by FH-sequence selection sections (111-1 to 111-n). A sub-carrier mapping section (112) maps the user signal and the control data to the sub-carrier according to the hopping pattern selected.

An output device is disclosed that includes an impedance matching section including an impedance adjustment section, and a dummy circuit section having the same configuration as the impedance adjustment section and adapted to calculate an adjustment value for matching an output impedance to a characteristic impedance of the transmission line. The impedance matching section sets the adjustment value to an impedance adjustment section, thereby matching the output impedance to the characteristic impedance. The output device further includes a switching transistor configured to be turned on / off so as to switch the output between an H level and an L level, and a constant current driver configured to add a constant current to the output.

According to one embodiment, a printed wiring board structure includes first and second semiconductor packages each including a substrate, and a printed wiring board including first and second component mounting surfaces having a relationship given as front and back surfaces and an inter-chip connection part provided at one portion thereof, the inter-chip connection part being provided with a plurality of arrayed through conductors penetrating through the first and second component mounting surfaces, wherein the substrates of the first and second semiconductor packages are arranged on the printed wiring board in a positional relationship such that the substrates mounted on the component mounting surfaces are partially overlapped via the printed wiring board, the external connection electrodes provided on the substrates are arrayed on the overlapped portion and are conductively connected to the through conductors arrayed in the inter-chip connection part.

Reception signals received by first to fourth antennas 11 to 14 are sequentially selected one by one repeatedly in accordance with first to fourth switches 31 to 34 being controlled by first to fourth switch control circuits 41 to 44, respectively, so as to be inputted to a signal shaping section 60. The reception signals having been shaped by the signal shaping section 60 are sampled by a sample-and-hold section 71 and AD-converted by an AD converter 72 in accordance with a time at which the reception signals are sequentially selected. The resultant signals are converted into parallel signals by a serial-parallel conversion section 73. Thus, the parallel signals are obtained as the reception signals of the first to the fourth antennas 11 to 14.

The purpose of the present invention is to provide a communication system comprising a higher-level device and a lower-level device which are connected via a PON system, said communication system transferring uplink data at a high speed from the lower-level device to the higher-level device such that strict requirements with regard to the time delay between the higher-level device and the lower-level device are met. This optical communication method is characterised by comprising in the following order: a scheduling execution step in which a higher-level device (1) schedules uplink communication, to the higher-level device (1), from one or a plurality of lower-level devices (5) that communicate with the higher-level device (1); and an uplink data transmission permission step in which the higher-level device (1) calculates and reports, to an OLT (2) that is connected at a lower level than the higher-level device (1) and connected via an optical fibre section (3) to one or a plurality of ONUs (4) connected at a higher level than the lower-level devices (5), an uplink data transmission time and permitted transmission amount from the ONUs (4) to the OLT (2) on the basis of the uplink communication scheduling.

A cable assembly comprises: an insulative housing; a plurality of contacts received into the insulative housing; a printed circuit board located behind the insulative housing and electrically connected with the plurality of contacts; a metallic shell enclosing the insulative housing and the printed circuit board; an insulative shell enclosing a rear portion of the metallic shell; and a cable having a plurality of optical fibers coupled to a top surface of the printed circuit board and a plurality of copper wires electrically connected to a bottom surface of the printed circuit board.

When playing a sport it is generally difficult to localize (exactly) an accessory requirement for that sport at a determined point in time. The localizing of sports equipment may however be desired in particular situations, for instance to track down lost articles of sports equipment, or to be able to apply the rules of a sport in efficient manner. The invention therefore relates to a system for localizing sports equipment. The invention also relates to a method for localizing sports equipment using such a system.

A wireless communication apparatus for performing wireless communication by selectively switching among a plurality of transmission schemes having different transmission performance capabilities is provided. A detection unit detects reception quality of a signal, and a changeover unit changes over the transmission scheme in accordance with the reception quality detected. A control unit performs control for changing a threshold value, which is for changing over the transmission scheme, in accordance with a fluctuation in the reception quality.

A parallel computer operates to reduce data held by a plurality of nodes. Each node constituting a parallel computer transfers the data divided into n to other nodes, and each node summarizes the respective 1 / n data and operates, then a plurality of nodes transfer the respective operation result to a summarizing node. Since all the nodes execute operation for divided data respectively, reduction processing time can be decreased. And more nodes (network adapters) can participate in data transfer through the first and second data transfers, high-speed transfer processing can therefore be implemented, and transfer time can be decreased.

A cable includes a first connector half holding a conductor terminal, a second connector half holding a conductor terminal, an electric cord electrically connecting the conductor terminal of the first connector half to the conductor terminal of the second connector half, and a waveform shaping circuit performing waveform shaping of a signal passing through the electric cord, and the first and second connector halves are structured to allow attachment to and detachment from each other.

An optical fiber, made of silica-based glass, comprising a core and a cladding, each of the optical fiber having a mode field diameter of 5.5 μm or larger at a wavelength of 1100 nm, transmitting light with a wavelength of 1250 nm in a single mode, and having a bending loss of 1 dB / turn or smaller at a wavelength of 1100 nm when the optical fiber is bent with a curvature radius of 2 mm.

The present invention provides a microstrip line for a printed wiring board such as a flexible printed wiring board which includes a sandwiched thin insulating layer and cannot use a solid grounding conductor, the microstrip line being such that shape of grounding conductors relative to signal lines remains unchanged even in the presence of a curved shape and that overlapping areas of signal lines and grounding conductors located opposite to each other remain unchanged even in case of exposure misalignment or stack misalignment. A printed wiring board with a microstrip line structure in which signal lines are curved include wire-type grounding conductors 5, 9, 12, 15, 19, or 26 located across an insulating layer 3, 10, or 13 from the signal lines 4, 6, 8, 11, 14, 18, or 25, characterized in that wiring pitch of the grounding conductors is 1 / n of width of the signal lines (where n is a natural number of 1 or 2).

Provided is a free-space optical signal alignment and transmission device, system, and method. The alignment and transmission device includes an optical engine and a collimating lens module which are connected. The optical engine converts an electrical signal into an optical signal and includes a base board, and a laser driver chip, a laser, a lens array module, a photodiode, and an electrical signal amplifier chip that are provided on the base board; the collimating lens module collimates and sends the optical signal transmitted from the optical engine to free space for transmission, and further shapes and sends the optical signal received from the free space to the optical engine. The laser is connected to the laser driver chip and the lens array module. One end of the photodiode is connected to the lens array module, and the other end thereof is connected to the electrical signal amplifier chip.