77results about How to "Extend signal coverage" patented technology

A method for routing a robotic apparatus to a service station and robotic apparatus service system using thereof are disclosed in the present invention, wherein the system comprises at least one service station and a robotic apparatus. The service station is capable of providing charging service and has a signal emitter array which functions to emit communication signals for guiding the robotic apparatus back to the service station. The robotic apparatus has a signal receiver for searching and detecting the communication signal emitted from the service station and determines the moving direction according to the intensity of the communication signal received by the signal receiver so as to arrive at the service station smoothly through the method disclosed in the present invention. Once the robotic apparatus arrives at the service station, the service station may provide service such as charging to the robotic apparatus while the robotic apparatus may standby to wait for the accomplishment of charging. By means of the method and system provided in the present invention, the robotic apparatus may route to the service station in a shortest way by rectilineal motion and contact to the service station to receive the service in arbitrary angle.

The present invention employs hierarchical modulation to simultaneously transmit data over different modulation layers using a carrier RF signal. Each modulation layer may be of a higher or lower order than the other modulation layers. Certain embodiments of the present invention may transmit different information on the different modulation layers. Other embodiments of the present invention may use the different layers for processing different information streams.

The present invention employs hierarchical modulation to simultaneously transmit data over different modulation layers using a carrier RF signal. Each modulation layer may be of a higher or lower order than the other modulation layers. Certain embodiments of the present invention may transmit different information on the different modulation layers. Other embodiments of the present invention may use the different layers for processing information differently.

The invention discloses a method for realizing downstream data beam formation and a system thereof; the method comprises: a base station transmits a downstream known sequence periodically to a terminal in a pre-distributive time-frequency resource section; the terminal carries out weight value estimation and extracts the corresponding phase information according to the received known sequence; theterminal carries out quantification to the corresponding phase and feeds back the quantified feedback bit to the base station by an upstream feedback channel; the base station reconstructs a weight vector according to the received feedback bit, and beam formation is carried out to the downstream data according to the feedback channel, the base station utilizes the weight value to carry out downstream data beam formation, so as to lead the system to trace the change condition of a user timely, achieve better beam trace effect, reduce array error, improve the reliability of the system, expand signal coverage range and reduce sending power.

A wireless communication system includes a Central Station (CS) capable of the functions of a Base Station Controller (BSC), and at least one access device controlled by the CS. The CS is connected to the at least one access devices through cables. The access device is adapted to demodulate the downlink wired signals of the CS to downlink Radio Frequency (RF) signals, and send the downlink RF signals to the destination wireless user. The CS is adapted to perform baseband processing, Intermediate Frequency (IF) processing, and RF processing for the data provided by the core network to obtain downlink RF signals, modulate the downlink RF signals to downlink wired signals, and send the downlink wired signals to the access device corresponding to the destination wireless user of the data provided by the core network. A CS, a BS, and two communication methods are disclosed herein.

The invention relates to the communication field, and discloses a transmitting and receiving device based on visible light communication, and a method thereof. The device comprises a transmitting part and a receiving part, wherein the receiving part comprises a photoelectric detector which is used for receiving a visible light signal. The receiving part also comprises an alignment module which is used for detecting the light intensity information of the received visible light signal, judging a position with the strongest intensity, and controlling the alignment direction of a receiving end of the photoelectric detector according to the position with the strongest intensity. When the device is used for receiving the visible light signal, the device can automatically align the position of a signal source, speeds up the alignment, achieves automatic control, saves manpower and time, fully collects the visible light signal, and improves the effectiveness of the signal.

The present invention provides a leader sequence sending method and device. The method comprises: user equipment (UE) sends a first leader sequence by using a repetition factor N1 according to a first sending power; if the UE does not receive the response message corresponding to the first leader sequence sent by a network device in a presetting time segment after sending the first leader sequence, the UE is switched to the next repetition factor N2, wherein the number of continuous sending times indicated by the next repetition factor N2 is larger than the number of continuous sending times indicated by the repetition factor N1; and the UE sends a second leader sequence by using the next repetition factor N2 according to the second sending power.

The invention provides a leaky cable based LTE (long term evolution) wireless signal coverage system in tunnel environment. The system comprises a core network, a plurality of baseband processing units, a plurality of remote radio units and a plurality of leaky cables; the core network is connected with the baseband processing units, each processing unit is connected with the remote radio units, and every two adjacent remote radio units are connected through one leaky cable. The leaky cables are used as transmission media, LTE wireless signal coverage in the tunnel environment is performed, the system is used for realizing dual-network dual-redundancy coverage of wireless signals, an LTE uplink wireless communication link MIMO (multiple input multiple output) method is realized, signal coverage range is large, and signal coverage is uniform.

The invention discloses a full-band multichannel big-power general transmitter implementation device and method, and the device comprises a multipath selectable small-power radio frequency signal synthesis module which is used for receiving multiple signal sources from a plurality of excitation modules, synthesizing the signal sources, and outputting a small-power radio frequency signal; a multipath small-signal in-phase distribution module which is used for receiving the small-power radio frequency signal, transmitting the small-power radio frequency signal, and generating N output signals so that a big-power power amplifier module group uses the N output signals; the big-power power amplifier module group which comprises N big-power power amplifier modules, wherein each big-power power amplifier module receives one of the N output signals, carries out three-level amplification and generating a high-power radio frequency signal; and a big-power bread antenna module group which comprises N big-power bread antenna modules corresponding to the N big-power power amplifier modules in a one-to-one manner, and is used for receiving big-power radio frequency signals and transmitting the coverage. The device reduces the equipment investment, enlarges the signal coverage area, and improves the operation stability of equipment.

The GPS signal covering equipment includes GPS signal source, antenna, filter, amplifier and indoors covering system. In order to introduce GPS signal source, the installed outdoor receiving antenna is connected to filter, amplifier and the indoors covering system in sequence. Introducing GPS signal from wide place, where there is no shielding object for viewing sky directly, the invention magnifies GPS signal and covers place, where GPS signal is needed. Advantages are: (1) capable of amplifying GPS signal, increasing efficiency of GPS receiving device; (2) GPS signal covers place, where there is no GPS signal before such as in doors, or in place of having strong electromagnetic interference; (3) large covering area of signal and good effect.

The invention discloses a reflective programmable metasurface for realizing wave beam scanning in ka waveband. The programmable metasurface is composed of 20 * 20 basic unit structures, and the basicunit structures are shown in figure 1. The size of the whole metasurface is small, and the miniaturization can be realized. The digital codes of the metasurface are obtained by designing different beam deflection angles, and then the state of each basic unit structure is controlled. The beam pointing at different angles is achieved. Therefore, the purpose of beam scanning is achieved. The reflective programmable metasurface is simple to manufacture, easy to integrate, low in cost and small in size, and can be directly used in a millimeter wave communication system.

The invention discloses an antenna and an antenna control method and device. In the scheme, the antenna comprises a substrate, an oscillator and three reflecting plates, wherein the oscillator is arranged on the substrate, a grounding point of each reflecting plate in the three reflecting plates is connected with a grounding end of the substrate, the three reflecting plates are separately arranged on vertexesof an equilateral triangle taking the oscillator as a gravity center, and an included angle between the reflecting surfaces ofany two reflecting plates in the three reflecting plates is an angle between 55 degrees and 65 degrees. The invention provides the antenna with a three-petal-shaped radiation pattern, the antenna has higher grain than that of an omnidirectional antenna and has better signal coverage range than that of a directional antenna, and thus, the antenna can be applicable for a multi-user multiple-input multiple-output (MU-MIMO) technology better.

The invention discloses a robot charging base and a robot system. The robot charging base comprises a signal transmitting device. The signal transmitting device comprises at least two signal transmitting channels. Each signal transmitting channel is internally provided with at least one signal transmitter. The distance between at least two signal transmitting channels progressively increases along the extension direction of the signal transmitting channels. With application of the mode, the overlapped part of the signal coverage of at least two signal transmitters can be reduced so that the robot is enabled to accurately judge its concrete position in the signal coverage of the specific signal transmitter and thus accurate positioning can be realized.

The invention relates to the technical field of radio-frequency identification (RFID), in particular to a one-dimensional barcode reading and locating based tracking locking RFID fusion system and method. The system comprises a cargo channel, sensors, a barcode reader, antenna rotation apparatuses and an antenna gate, wherein the cargo channel penetrates through the antenna gate; the sensors are in communication connection with the antenna rotation apparatuses and are used for detecting the cargo channel and sending a detection result to the antenna rotation apparatuses; the antenna gate comprises a plurality of antennae; the antennae are connected with the antenna rotation apparatuses in a one-to-one correspondence manner; and the antenna rotation apparatuses are used for rotating and driving the antennae when the sensors detect that cargos exist on the cargo channel. According to the system, initial position information of the cargos is obtained through the position sensors on the channel, the moving speed of the cargos is calculated, and the rotating angular speed of each antenna is dynamically controlled, so that antenna signals can be always aligned to the cargos; and while the barcode reader reads one-dimensional code information, RFID tag information is read and bound by fusion.

The invention discloses an interactive electronic security police preparation method, system and device based on GIS. The method comprises the following steps: intelligent real-time monitoring and identifying is carried out in the location of an interactive electronic security police device by using infrared sensors, recording equipment and video equipment; when a security event occurs, an intelligent alarm module is automatically started to intervene the security event on site and issue an alarm intelligently; and the change of the threat level of the on-site behavior is continuously judged,and corresponding on-site intervention is carried out. Real-time monitoring and intelligent active intervention in the location of an electronic security police preparation device are realized. Multiple electronic security police devices in a region constitute a regional network to carry out real-time and on-site intervention and active alarm receiving, intervention and police dispatching in the monitored large region range and discover and handle security risk and emergency rescue events in time, so as to make up for the shortage of manpower and material resources in relevant departments.

Disclosed are techniques for liveliness detection. In an aspect, a radar sensor of an electronic device transmits a radar frame comprising a plurality of bursts, each burst comprising a plurality of radar pulses, and receives a plurality of reflected radar pulses. The electronic device generates a radar image representing azimuth, elevation, range, and slow time measurements for the radar frame based on the plurality of reflected pulses, applies a Doppler FFT to the radar image to convert the radar image to represent azimuth, elevation, range, and velocity measurements for the radar frame, identifies at least one area of motion in the radar image based on velocity bins of the radar image, and detects a target dynamic object based on a CFAR detection applied over the range and azimuth measurements and a SNR threshold of the received plurality of reflected pulses associated with the at least one area of motion.

The invention discloses a main / standby electronic toll collection (ETC) track system with variable transaction scopes and a realization method thereof. The system comprises a main control computer, an automatic barrier machine, an expense display, two or more than two road side read-write devices, and a vehicles detector. According to a direction from which vehicles successively enter, the system divides a main communication area and a standby communication area on an ETC track; when the system does not complete ETC transaction with the vehicles at the main communication area, the standby communication area will be automatically started to carry out the ETC transaction with the vehicles; and when a portion of the road side read-write devices fail to work, the system will adjust power of the road side read-write device that can work normally, so that signal coverage on the vehicles can be ensured and thus a traffic flowing effect can be ensured.

The invention discloses a resource allocation method of an RIS-assisted multi-unmanned aerial vehicle communication system. The method comprises the following steps: introducing an intelligent reflecting surface into a multi-unmanned aerial vehicle assisted non-orthogonal multiple access system, and constructing an intelligent reflecting surface assisted multi-unmanned aerial vehicle communication system; establishing a mathematical model for minimizing the total energy consumption of the intelligent reflecting surface assisted multi-unmanned aerial vehicle communication system; and performing joint optimization of unmanned aerial vehicle position deployment and resource allocation. By means of the intelligent reflecting surface, the signal coverage range of the unmanned aerial vehicle is enhanced; by adopting the NOMA technology, a plurality of users can share the same spectrum resource under the constraint of ensuring the minimum transmission rate of the users, the access of massive users is realized, and the spectrum efficiency is improved.

The invention discloses a double-frequency omnidirectional antenna. The double-frequency omnidirectional antenna comprises a first patch, a first dielectric substrate, a second patch, a second dielectric substrate, and a grounding plate which are orderly laminated, and a metal probe connected with a feed port after orderly penetrating the first dielectric substrate, the second patch, the second dielectric substrate and the grounding plate; the clearance is retained between the metal probe and the second patch, and one end, far away from the feed port, of the metal probe is propped against thefirst patch, thereby enabling the metal probe to directly feeding on the first patch and performing the coupling feeding on the second patch, wherein the sizes of the first patch and the second patchare different. The double-frequency omnidirectional antenna has wide impedance width and axial ratio bandwidth, and has good omnidirectional radiation feature; the omnidirectional antenna disclosed bythe invention is simple in structure, low in section and especially suitable for the current wireless communication system.

The invention relates to the technical field of wireless communication, in particular to a method and device for accessing a network, so as to solve the problem in the prior art that networked devices such as smart sensors and smart appliances are not connected to a local area network including multiple terminals. The present invention provides a method for accessing a network. In the method, a gateway device broadcasts access information, and notifies the first type of subordinate user equipment to broadcast the access information; the gateway device determines the first channel quality value according to the pilot signal, and receives The second channel quality value: the gateway device determines the device connected to the target user equipment according to the first channel quality value and the second channel quality value, and performs access processing. The gateway device and the subordinate user equipment of the present invention can send access information to the networked device, and determine the channel quality with the networked device according to the pilot signal in the feedback signal, and determine the connection relationship with the networked device, and perform Access, so that networked devices can be connected to a local area network containing multiple terminals.

The invention relates to a data compression method and device, computer equipment and a storage medium, and the method comprises the steps: obtaining to-be-compressed baseband I / Q data by a terminal,and calculating the amplitude value of the to-be-compressed baseband I / Q data; determining a multi-segment amplitude value range according to the baseband I / Q data to be compressed; compressing the amplitude value of the baseband I / Q data to be compressed according to the amplitude value range corresponding to the baseband I / Q data to be compressed to obtain a compressed amplitude value; and according to the compressed amplitude value, searching data corresponding to the compressed amplitude value in a compression table to obtain compressed data. According to the data compression method provided by the invention, the compression process is simplified, so that the signal coverage range of the baseband data transmission system is expanded.

The invention discloses a vortex wave two-dimensional scanning system integrating a Rodman lens and an active metasurface, and mainly solves the problems of complex structure and lower communication capacity in the prior art. The vortex wave two-dimensional scanning system comprises an active transmission metasurface (1) and a feed source (2), the feed source adopts a single-layer Rodman lens antenna, and the active transmission metasurface is composed of a plurality of active transmission units; each active transmission unit comprises an upper layer and a lower layer which are the same in structure, and each layer comprises a dielectric substrate, a metal patch, a feed strip line, a metal column and a variable capacitance diode; the metal patch and the feed strip line are respectively printed on the upper surface and the lower surface of the dielectric substrate, and are connected through the metal column penetrating through the dielectric substrate; the variable capacitance diode is loaded in the center of the metal patch, and the two-dimensional scanning of vortex beams is achieved by changing the bias voltage of the variable capacitance diode and the input port of the Rodman lens antenna. According to the invention, the system structure is simplified, vortex beams can be generated, the communication capacity of the system is increased, and the system can be used for wireless communication and radar detection.

The invention discloses an intelligent comprehensive mining underground personnel locating and on-line monitor management system which comprises a dispatching center, a central control computer system, data communication interfaces, mining personnel locating substations, mining personnel locating radio frequency cards, mining wireless transceivers, mining radio frequency locating devices and a mining explosive-proof and intrinsic-safety uninterruptible power supply. A shaft mouth, a coal face and a comprehensive collecting work face are provided with the mining wireless transceivers and the mining radio frequency locating devices, the central control computer system is connected with the data communication interfaces, the data communication interfaces are connected with the mining personnel locating substations, the mining personnel locating substations are provided with mining personnel locating devices, and personnel carry the mining personnel locating radio frequency cards. The intelligent comprehensive mining underground personnel locating and on-line monitor management system achieves whole mine signal coverage, the signal coverage range of one substation can reach more than 500-1000m, precise locating can be achieved, real-time personnel tracking and locating management can be achieved, wireless paging is achieved, wireless bidirectional data communication is achieved, and large-capacity data transmission is achieved.

The invention relates to a communication method of an unmanned aerial vehicle and the unmanned aerial vehicle. The method is applied to the unmanned aerial vehicle provided with an azimuth tracking device, and an array antenna is arranged on the azimuth tracking device. The method comprises the following steps: initializing the orientation of the orientation tracking device and the direction of asignal beam of the array antenna; acquiring position state information of the unmanned aerial vehicle; controlling the azimuth tracking device to deflect on a horizontal plane according to the position state information; controlling the array antenna to adjust the angle of a signal beam on a vertical plane according to the position state information; and sending the signal through the array antenna. According to the scheme, directional signal transmission is carried out by adopting the array antenna, so that the antenna gain can be greatly improved, the signal coverage range is increased, andthe antenna can be used for transmitting high-definition images. Position tracking of the array antenna is decomposed into a horizontal plane and a vertical plane for control, and the complexity of tracking control is reduced.

The invention relates to a wireless charging method and system for an outdoor robot, and the method comprises the steps that a charging platform transmits a broadcast code in one or more wireless charging regions through an infrared signal, wherein the broadcast code comprises a signal representing that the wireless charging region is idle; the robot receives the broadcast code under the conditionthat the robot passes through an infrared signal radiation area corresponding to the wireless charging area, and determines whether to charge or not; if the robot is charged, the robot linearly movesto a wireless charging area of the charging platform for charging according to the infrared signal. According to the embodiment of the invention, information interaction is carried out through the infrared signals, the positioning accuracy can be ensured based on the linearity of infrared light transmission, the cost of the infrared emitter and the infrared receiver is low, and the cost of charging equipment can be reduced; meanwhile, the communication distance of the infrared signals is wide, the coverage range of the infrared signals can be enlarged, and the applicability and expansibilityof the product are improved.

The invention discloses an underground personnel positioning system based on a power carrier technology, belonging to the technical field of underground personnel positioning systems. The underground personnel positioning system is composed of a plurality of portable signal transmitters, a plurality of signal receivers, a power line carrier module, a plurality of signal transmission stations, a central control machine and a display system; the portable signal transmitters are in wireless connection with the signal receivers; the signal receivers are connected to the power line carrier module; the signal receivers are connected to the signal transmission stations; the signal transmission stations are connected to the central control machine; and the central control machine is connected to the display system. The underground personnel positioning system disclosed by the invention has the advantages of being high in coverage ratio, rapid in transmission speed, low in secondary investment, simple in structure and flexible in configuration.

The invention relates to a space-time coding sending method based on a novel reconfigurable intelligent surface, and the method comprises the steps that 1, a user A sends a pilot frequency, a user B does not send a signal, and a control unit starts all M units of the novel reconfigurable intelligent surface; 2, the user B sends the pilot frequency, the user A does not send the signal, and the control unit starts all M units of the novel reconfigurable intelligent surface; 3, in the first stage of space-time coding, the user A and the user B send pilot frequencies at the same time, and the control unit starts all M units of the novel reconfigurable intelligent surface; 4, in the second stage of space-time coding, the user A and the user B send pilot frequencies at the same time, and the control unit starts all M units of the novel reconfigurable intelligent surface; 5, the base station demodulates x(0) and x(1) by using the signals received in the first stage and the second stage. According to the scheme, the system performance is improved, and the sending method which is fast, reliable and low in implementation complexity is provided accordingly.