99results about How to "Simultaneous transmission" patented technology

A downhole tool includes a non-contact, electrical coupling device configured to transmit electrical power and / or data between relatively rotating components. In one embodiment, the coupling device includes at least first and second wound toroidal cores deployed about a shaft. At least one of the wound toroidal cores is rotationally fixed to the shaft, while at least one other is rotationally fixed to a housing in which the shaft is deployed. The shaft forms a portion of a conductive loop that extends through the toroids. A non-contact electrical pathway is advantageously provided for high power electrical transmission and / or high speed data transmission across a gap between first and second rotating members of a downhole assembly.

A moving ground penetrating radar is comprised of multiple transmitters and receivers with multiple, e.g., Horizontal and Vertical, polarizations to detect buried targets with standoff capability. Novel signal and imaging techniques are used to form high quality radar imagery with low artifacts that are due to various sources of self-induced resonances, e.g., transmitter-receiver coupling, calibration errors, and motion errors in the multi transmitter / receiver channels of the radar system. The irradiated target area image is formed via exploiting both the spatial diversity of the physical multi-transmitter and multi-receiver array and synthetic aperture / array that is generated by the motion of the platform that carries the radar system. The images that are formed from the multiple polarizations are combined to remove surface targets / clutter and, thus, enhance signatures of buried targets.

A multi-coupler system for isolating radio signals in a transceiver, that includes a transmitter and a receiver, to permit simultaneous transmit by the transmitter and receive by the receiver through a single antenna in the exact same or nearby frequency ranges. This is done so that in-coming receive signals, transmitted from a remotely located radio, being detected by the receiver is much stronger than the portion of the transmit signal unintentionally coupled over by the co-site (or co-located) transmitter. The invention uses a special electronic circuit, termed the quasi-circulator, to couple the antenna to both the co-located receiver and the transmitter. The invention can also be used to couple several transceivers to a single antenna. The quasi-circulator circuit includes a simulated antenna load with an impedance matched to the antenna impedance. The circuit also includes a transformer with its primary side fed asymmetrically by the antenna so that it can pass the desired receive signal with minimum attenuation. The transformer's primary is on the other hand fed symmetrically from both sides by equally small portions of the transmit power from the co-site transmitter, but these signals are 180 degrees out of phase and cancel almost completely in the transformer.

Aspects of this invention include a downhole assembly having a non-contact, capacitive coupling including first and second transceivers deployed in corresponding first and second downhole tool members. The capacitive coupling is disposed to transfer electrical signals between the first and second transceivers. In one exemplary embodiment, the capacitive coupling is configured to transfer data and power between a substantially non-rotating tool member and a rotating tool member, for example, the shaft and blade housing in a steering tool. Exemplary embodiments of this invention provide a non-contact, high-speed data communication channel between first and second members of a downhole assembly. Moreover, exemplary embodiments of the invention also provide for simultaneous non-contact transmission of electrical power between the first and second tool members.

A system for contactless data and power transmission between a first vehicle component and a second vehicle component includes a first control unit, a second control unit, and a transducer with a primary winding and a secondary winding. The first control unit is adapted to generate an alternating voltage at a signal output port from a voltage present at a voltage input port, where the frequency of the alternating voltage is modulated depending on the data that is input at a data input port, and wherein the second control unit is adapted to demodulate the data and provide it at the data output port.

The invention discloses an implantable nerve electrical stimulation device which comprises a personal digital assistant (PDA), an in vitro controller, an in vivo stimulator and a stimulation electrode. A user uses the PDA to record the information of an experiment animal, and the working condition of the in vivo stimulator and the stimulation electrode. Stimulation parameters are programmed and are transmitted to the in vitro controller through bidirectional wireless radio frequency communication. Data and energy percutaneous wireless transmission is carried out between the in vitro controller and the in vivo stimulator through in vitro and in vivo coil coupling. The in vivo stimulator is sealed by a biology compatible silicone material, produces a stimulation pulse with specific parameters, and outputs the stimulation pulse to the stimulation electrode which is implanted into an epidural space through operation, so as to carry out spinal cord nerve electrical stimulation. The stimulation electrode is a multi-contact electrode based on a flexible circuit board technology. Insulation package is carried out on a number of gold-plated electrode contacts through polyimide. The device and the system, which are provided by the invention, are used for analgesia and promoting the mechanism study of movement function recovery after spinal cord injury, and can be used for the animal experiment study of the electrical stimulation therapy of Parkinson and other neurological diseases.

The invention relates to a data transmission accelerating engine method based on multiple access passages of a transmitting end, which comprises the following steps: after a transmitting end host machine downloads a data packet from an application layer, carrying out TCP multiplexing encapsulation; then delivering the data packet to a TCP / IP protocol stack of a host machine operation system to process; transmitting an encapsulated IP datagram formed by an IP layer to a link layer and then to a physical layer; arriving at a data receiving party by an intermediate routing and demultiplexing by the receiving party. The method is characterized by comprising the following steps: arranging a data transmission accelerating engine between the IP layer and the link layer; grouping the data to be transmitted of the IP datagram according to a mark bit in an IP masthead; then detecting the flow load condition of all transmission passages of the grouped datagram groups by a load balancing module; carrying out predistribution calculation by a corresponding flow distribution algorithm and distributing a data flow to be transmitted to all available transmission passages to transmit in parallel; and finally appointing the predistributed datagram groups to different network interface devices by a data dispatching module.

A multi-coupler system for isolating radio signals in a transceiver, that includes a transmitter and a receiver, to permit simultaneous transmit by the transmitter and receive by the receiver through a single antenna in the exact same or nearby frequency ranges. This is done so that in-coming receive signals, transmitted from a remotely located radio, being detected by the receiver is much stronger than the portion of the transmit signal unintentionally coupled over by the co-site (or co-located) transmitter. The invention uses a special electronic circuit, termed the quasi-circulator, to couple the antenna to both the co-located receiver and the transmitter. The invention can also be used to couple several transceivers to a single antenna. The quasi-circulator circuit includes a simulated antenna load with an impedance matched to the antenna impedance. The circuit also includes a transformer with its primary side fed asymmetrically by the antenna so that it can pass the desired receive signal with minimum attenuation. The transformer's primary is on the other hand fed symmetrically from both sides by equally small portions of the transmit power from the co-site transmitter, but these signals are 180 degrees out of phase and cancel almost completely in the transformer.

The invention discloses an automatic water level extraction method and system based on a reservoir monitoring camera. The standard size of a reservoir is monitored based on image data provided by the reservoir monitoring camera, and the water level is automatically extracted through an image processing method. On the premise that precise water level data are provided, corresponding water level image data are provided, and key pixel training extraction, edge detection extraction, clustering analysis, denoising and water level segment detection are conducted on the image data so that the function of automatically calculating water level data on the basis of camera data can be achieved. According to the automatic water level extraction method and system based on the reservoir monitoring camera, on the basis that the reservoir monitoring camera executes a monitoring task, water level value calculation and extraction are automatically conducted on monitored images, an existing water level data extraction process is simplified, reservoir water level real-time monitoring and data acquisition are achieved on the premise that no hardware facilities are added, and the water level extraction method and system can be widely applied to reservoir production practice.

The invention discloses an information transmission method and device. The method comprises the following steps: to begin, determining a predefined pattern for carrying information, wherein the predefined pattern comprises a predefined sequence, or a predefined reference symbol RS time-frequency structure; and then, transmitting the predefined pattern carried with the information in a preset time-frequency domain resource.

The embodiment of the invention discloses an unmanned aerial vehicle trajectory and resource allocation joint optimization method for multi-carrier wireless communication. The method comprises the following steps: S1, creating an optimization model for multi-node energy-carrying communication based on an unmanned aerial vehicle; S2, splitting the optimization model, and respectively carrying out iterative solution on split sub-models; S3, fixing the trajectory of the unmanned aerial vehicle, and optimizing the resource allocation variable of the unmanned aerial vehicle; S4, fixing unmanned aerial vehicle resource allocation, and optimizing the flight path of the unmanned aerial vehicle; and S5, performing flight path and resource allocation joint optimization of the unmanned aerial vehicleto obtain an optimal value of the optimization variable. According to the invention, simultaneous transmission of information and energy of a plurality of ground nodes by the unmanned aerial vehicleis realized; the problems of node information interaction and endurance time of the Internet of Things are solved, and meanwhile, the design complexity of the receiver can be effectively reduced; andthe communication link is improved through the flight path of the unmanned aerial vehicle, the wireless resource utilization rate is improved, and the maximization of the data transmission rate is realized.

The invention relates to a method for transmitting position information in a voice service. The method comprises the following steps: after continuously transmitting first-group voice of 20ms*N at a sending end, replacing voice data in a preset first 20ms time period by position information data and specific identification and sending, wherein the N is larger than or equal to 20; continuously transmitting second-group voice of 20ms*N, replacing preset voice data in a second 20ms time period in a voice super frame by the position information data and specific identification and sending, wherein the N is larger than or equal to 20; and so on, sending all data; at a receiving end, after continuously obtaining the first-group voice of 20ms*N, obtaining the position information data and the specific identification in the preset first 20ms time period in the voice super frame and processing, wherein the N is larger than or equal to 20; after continuously obtaining the second-group voice of 20ms*N, obtaining the position information data and the specific identification in the preset second 20ms time period in the voice super frame and processing, wherein the N is larger than or equal to 20; and so on, receiving all data. The method for transmitting the position information in the voice service, which is disclosed by the invention, has the advantages that the position information data is simultaneously transmitted in a voice communication process when a PDT (photodynamic therapy) device or a DMR (deuteron magnetic resonance) device is used.

The invention discloses a bidirectional multi-channel chaotic laser communication system and a communication method, and the method comprises the steps: injecting a beam of continuous laser into an isolator-free multi-longitudinal-mode semiconductor laser with external cavity random grating feedback, and achieving the spectrum broadening of multi-mode chaotic laser without delay characteristics; Adjusting the wavelength of the injected light to regulate and control the chaotic laser spectrum bandwidth output by the isolator-free multi-longitudinal-mode semiconductor laser and the chaotic laserspectrum bandwidth of each sub-mode of the isolator-free multi-longitudinal-mode semiconductor laser, and separating the chaotic laser spectrum bandwidth by using a wavelength division multiplexer according to the longitudinal-mode wavelength to serve as a chaotic laser carrier for multi-channel communication; And dividing the obtained chaotic laser with wide frequency spectrum, multimode and notime delay characteristics into three paths through two couplers to form two closed-loop structures which are respectively used for realizing forward and reverse multi-path information loading transmission demodulation. According to the invention, two lasers are not needed to generate synchronous chaotic laser, the system structure is simplified, the bidirectional multi-channel information safetycommunication capability can be realized, and the function of simultaneously loading information at different rates can be realized.

The invention discloses an energy efficiency maximization-based multi-user information and energy simultaneous transmission transceiver design method. According to the energy efficiency maximization-based multi-user information and energy simultaneous transmission transceiver design method of the invention, the lagrangian relaxation technology is adopted to decompose a complex energy efficiency maximization-based multi-user information and energy simultaneous transmission transceiver design problem into a series of sub problems with closed-form solutions, namely, the design method includes the following steps that: equivalent variation is performed on total power constraints of transmission, and lagrangian multipliers are led into equivalent power constraints, so that a part of a lagrangian function and corresponding dual problems can be obtained; the dichotomy and Dinkelbach method are utilized to solve the dual problems, so that optimal energy efficiency can be obtained; and finally a base station obtains pre-coding vectors corresponding to the maximum efficiency and transmits receiving power splitting factors to a user through a control channel. Based on the above steps, information and energy simultaneous transmission transceiver design can be completed, and energy efficiency maximization can be realized when information and energy simultaneous transmission is realized.

The invention relates to a dual-mode electric energy meter communication system and a method. The system comprises a main station, a concentrator, a dual-mode routing module, a carrier communication unit, a micro-power wireless communication unit, a dual-mode communication module, and a smart meter. An output end of the main station is connected to an input end of the concentrator, an output end of the concentrator is connected to an input end of the dual-mode routing module, an output end of the dual-mode routing module is respectively connected to the carrier communication unit and the micro-power wireless communication unit, an output end of the carrier communication unit and an output end of the micro-power wireless communication unit are connected to the dual-mode communication module, and the dual-mode communication module is connected to the smart meter. The dual-mode electric energy meter communication system and the method improve communication efficiency and reliability and achieve simultaneous transmission of a large amount of data. Therefore the dual-mode communication mode not only inherits the advantages of the power line carrier, but also compensates for the insufficient of environmental requirements.

The invention provides a data transmission method, a terminal and network equipment, and solves the problem that the existing specification cannot support simultaneous transmission of a PUSCH from a multi-antenna panel. The transmission method provided by the invention comprises the following steps: receiving physical uplink shared channel (PUSCH) scheduling information sent by a network device, with the PUSCH scheduling information comprising first indication information and second indication information, the first indication information being used for indicating a data layer included in a PUSCH, and the second indication information being used for indicating a precoding matrix; and according to the precoding matrix indicated by the second indication information, mapping a data layer included in the PUSCH to at least two target antenna panels for sending, with the target antenna panel being an antenna panel for transmitting the PUSCH in the at least two antenna panels of the terminal.According to the embodiment of the invention, the aim of simultaneously transmitting the data layer of the PUSCH from a plurality of antenna panels is fulfilled.

The present invention provides a multi-path information high-speed transmission chaos secret communication device and method. Two paths of lasers with different wave lengths are injected into two multi-longitudinal mode lasers with same outer cavity optical mirror feedback mutual coupling non isolators, and the two multi-longitudinal mode lasers perform sync output while achievement of the chaos laser spectrum broadening; the wave lengths of the injected light are regulated to regulate and control the chaos laser spectral bandwidths output by the multi-longitudinal mode lasers and the chaos laser spectral bandwidths of each sub mode; the two obtained synchronization chaos lasers comprising the chaos lasers of the sub modes are divided according to the wave lengths by employing a wavelengthdivision multiplexer, and the obtained chaos lasers with multiple wave lengths are taken as carriers of the chaos secret communication; and information of different rates is loaded at a transmittingend, and a demodulator is employed to demodulate the information at a receiving end. The generated chaos secret communication system has the capacity of achievement of the multi-path information secret communication and can achieve a synchronous loading function of different rate information.

A system for contactless data and power transmission between a first vehicle component and a second vehicle component includes a first control unit, a second control unit, and a transducer with a primary winding and a secondary winding. The first control unit is adapted to generate an alternating voltage at a signal output port from a voltage present at a voltage input port, where the frequency of the alternating voltage is modulated depending on the data that is input at a data input port, and wherein the second control unit is adapted to demodulate the data and provide it at the data output port.

The invention discloses a signal receiving and transmitting device and a communication method thereof. The signal receiving and transmitting device comprises a plurality of signal level converters, a parallel / serial converter, a coding / decoding device, a modulation / demodulation device and a photoelectric converter, wherein the plurality of signal level converters convert RS232 level signals into transistor-transistor logic (TTL) / complementary metal oxide semiconductor (COMS) level signals and transmit the COMS level signals to a central processing unit (CPU) to perform data coding and modulation; the parallel / serial converter is used for converting a plurality of level signals into one information stream in the transmitting process of the data and converting one information stream into the plurality of level signals in the receiving process; the coding / decoding device is used for coding one information stream into a plurality of code blocks in the transmitting process and decoding the plurality of code blocks into one information stream in the receiving process; the modulation / demodulation device is used for modulating the plurality of code blocks into a plurality of high-order modulation symbols or demodulating the plurality of high-order modulation symbols into the plurality of code blocks; and the photoelectric converter is used for converting the high-order modulation symbols into optical signals and then transmitting the optical signals. By means of the signal receiving and transmitting device and the communication method of the signal receiving and transmitting device, long-distance optical fiber communication among universal asynchronous receivers / transmitters (UARTs) can be achieved, antijamming capability is enhanced, and communication quality is improved.

The invention relates to a system (1) for MR imaging of a body (14) placed in an examination volume (7). The system (1) comprises means (2) for establishing a substantially homogeneous main magnetic field in the examination volume, means (3, 4, 5) for generating switched magnetic field gradients superimposed upon the main magnetic field, transmission means for radiating RF signals towards the body (14), control means (20) for controlling the generation of the magnetic field gradients and the RF signals, means (17) for receiving and sampling MR signals, reconstruction means (21) for forming MR images from the signal samples, and auxiliary means (23) having an RF antenna (24) for receiving RF signals generated by the transmission means. In order to provide an MR system that enables a safe, reliable and non-interfering transmission of signals and / or power to the auxiliary means (23) located within the examination volume (7), the invention proposes that the system (1) is arranged to generate circularly polarised RF signals via the transmission means, which RF signals have a selectable sense of rotation.

The invention discloses a multi-passive reflection label access system based on code division multiple access and a control method. The multi-passive reflection label access system comprises a plurality of passive reflection labels, an excitation source and a receiver, wherein each passive reflection tag sends a backscattering signal of an excitation source to the receiver after sequentially carrying out frame sealing, coding and modulation on the sent data, and each code contains a unique PN sequence of the corresponding passive reflection tag; and the receiver can decode the received coded data sent by the passive reflection labels and distinguish the coded data sent by different passive reflection labels according to PN sequences obtained by decoding. The system realizes simultaneous transmission of a plurality of nodes by code division multiple access in a passive reflection communication system comprising a plurality of passive reflection tags.

The invention relates to an ultrashort wave OFDM mobile multimedia sensor network TDMA multi-user transmission method. A transmission system has a working frequency of 300-400MHz. The channel width is 8MHz; N base stations and M user ends are arranged; each base station is connected with a control center by using optical fiber; and time accounting is done by GPS. A frame structure, which is positioned in every base station wireless channel time domain and which repeats regularly, is divided into M+1 time slots; the 1 to M time slots correspond to the 1 to M user ends and uploads the data to the base station; the data from N base stations in M+1 time slots are downloaded to the M user ends at the same time. The transmission rate of uplink data of the user end to the base station is greater than 750kbps / channel; and the transmission rate of downlink data to the user end is greater than 30kbps / user. With the scheme, the invention has the advantages that transmission effect is good, and has the ability of real-time transmission of multi-channel images and diffraction capability under urban environment.

A space-time block coding method using an auxiliary symbol in a multiple transmit / receive antenna system is provided. In the space-time block coding method, binary data to be transmitted is received. Free symbols and an auxiliary symbol are generated by dividing the received binary data into units of a predetermined number of bits. The free symbols and the auxiliary symbol are encoded according to an encoding matrix and transmitted.

The invention relates to a sheet-grasping mechanical arm of a full-automatic battery plate printing machine, which comprises a vertical movement mechanism and a horizontal movement mechanism, wherein a front arm mechanism and a rear arm mechanism are arranged in the horizontal movement mechanism; the front arm mechanism and the rear arm mechanism have the same structure; the front arm mechanism comprises a pair of paw sheet mounting beams, a paw base, paw sheets, a sensor mounting plate, a magnetic grid and a sensor chip; the lower surface of the paw base is provided with a pair of parallel paw sheet mounting beams; 2 to 5 pairs of the paw sheets are uniformly distributed on one lateral surface of each paw sheet mounting beam; the front arm mechanism and the rear arm mechanism are fixedly connected with a mover of a corresponding X-direction linear motor respectively; and the lower ends of the paw sheets are provided with supporting sheets. The sheet-grasping mechanical arm of the full-automatic battery plate printing machine has the advantages of compact structure, high accuracy and quick motion, and can realize the synchronous conveying of two groups of materials and avoid extrusion and vibration to the materials in grasping movements; and the sheet-grasping mechanical arm of the full-automatic battery plate printing machine is safe and reliable to use, has a high working efficiency and meets requirements on mass production.

A Femto and WLAN dual-mode wireless coverage system comprises a Femto subsystem, a WLAN subsystem, a gateway / WLAN AC subsystem, a network management subsystem and a transmission network system. The Femto subsystem is used for receiving Femto data of a user and setting corresponding VLAN labels on the Femto data. The WLAN subsystem is used for receiving WLAN data of the user and setting corresponding VLAN labels on the WLAN data. The transmission network system is used for transmitting the Femto data and the WLAN data to the gateway / WLAN AC subsystem in a dataflow mode. The gateway / WLAN AC subsystem is used for judging the Femto data and the WLAN data from Femto / WLAN data flow according to the VLAN labels, forwarding the Femto data to a core network, and forwarding the WLAN data to the network management subsystem or an Internet backbone network. The network management subsystem is used for managing and controlling the Femto subsystem and the WLAN subsystem. According to the Femto and WLAN dual-mode wireless coverage system, simultaneous transmission of Femto signals and WLAN signals are achieved, so that multiple-mode coverage of the Femto signals and the WLAN signals is achieved, and equipment cost and deployment difficulty are reduced.

The invention discloses an intrinsically safe network voice controller for mining, comprising a CPU (central processing unit) circuit, wherein the CPU circuit is respectively connected with a network processing circuit, an SD (Secure Digital Memory) card circuit, two paths of audio coding and decoding circuits, an audio drive circuit and a power supply circuit for supplying power, the two paths of audio coding and decoding circuits are connected with at least one path of audio interfaces through the audio drive circuit, and the SD card circuit is directly connected with the audio coding and decoding circuits. The intrinsically safe network voice controller for mining, disclosed by the invention, is a part of underground digital broadcast of a coal mine, the digital broadcast is transmitted by a network, so that the signal to noise ratio is high, the transmission distance is far, and the digital broadcast has an advantage incomparable to that of the traditional constant pressure broadcast method. The intrinsically safe network voice controller for mining is suitable for such occasions as an underground sidewalk of mine, a parking place and a rest room, etc.

The present invention discloses group calling short data transmission method relating to group calling wireless communication technology, to make group calling capable of realizing phonetic and data synchronous transmission. It contains when up channel not occupied by other user equipment, short data transmission user equipment applying occupying up channel and reporting short data layer message, network side equipment responding said layer message, in FACCH and SACCH channel broadcasting said short data and then releasing up channel occupying. If up channel having been occupied by other user equipment, the short data transmission user equipment applying through network side equipment assigning one SDCCH sub-time slot, through said sub-time slot reporting short data layer message, network side equipment responding said layer message, releasing SDCCH occupying, and broadcasting said short data in group calling channel.

The invention provides a cross-network application calling method and device, routing equipment and a computer readable storage medium. The invention relates to a network and routing technology in thefield of cloud technology. The method comprises the following steps: receiving data packets of a plurality of first applications in a first network through a first gateway in routing equipment; performing multiple rounds of sending on the data packets of the plurality of first applications, performing segmentation processing on the plurality of data packets to be sent in each round of sending process, performing splicing processing on the obtained segmentation data to obtain a recombined packet, and sending the recombined packet to a second gateway through a data transmission channel betweenthe first gateway and the second gateway; and through the second gateway, restoring the plurality of recombined packets accumulatively received by the second gateway into data packets of the pluralityof first applications, and sending the data packet of each first application to a second application to be called in a second network. Through the application, accurate and timely application callingcan be realized, and the bandwidth utilization rate of the bearing equipment of the application is improved.

A synthetic aperture antenna device for transmitting signals of a system includes a carrier and means for determining its trajectory, and, for each signal respectively associated with a spatial direction, processing means suitable for generating a stationary phase signal over a time window corresponding to the distance traveled by the device throughout the period of coherent integration, before modulation of the received signal, the processing means comprising correction means suitable for correcting the carrier phase of the signal.