189 results about "Broadband communication" patented technology

The invention discloses a communication method for broadband communication and satellite fusion, which comprises the following steps of: classifying data streams, ensuring priority transmission of high-priority data streams by adopting a self-adaptive flow control protocol, carrying out load balancing according to link quality in combination with a satellite and a ground communication link, and when the communication link fluctuates, outputting the data streams. The method can automatically switch to a backup link or adjust a transmission mode, guarantees the communication stability, predicts the satellite communication time delay through deep learning, carries out the time delay compensation, optimizes the communication efficiency, intelligently allocates bandwidth resources according to the user demands and geographic positions, optimizes the bandwidth utilization rate, reduces the data transmission amount through a self-adaptive compression algorithm, and improves the bandwidth utilization rate. Therefore, the problems of non-uniform bandwidth utilization, unstable link, delay fluctuation and insufficient flow control in the prior art are solved, and through intelligent prediction and real-time adjustment, the system can efficiently utilize bandwidth resources, ensure communication stability, reduce delay fluctuation and improve overall communication quality.

The invention discloses an optical terminal intensity instrument and an earthquake monitoring service system and method, and the optical terminal intensity instrument comprises an optical fiber modem and an MEMS sensor module. The optical fiber modem comprises an MCU (Microprogrammed Control Unit) and an optical communication module electrically connected with the MCU; the optical communication module is used for realizing network access and data uploading; the MEMS sensor module is electrically connected with the MCU; the MEMS sensor module is used for collecting seismic intensity data in real time; and the optical fiber modem is used for providing a dual data transmission channel comprising broadband communication and the seismic intensity data. According to the technical scheme provided by the invention, the MEMS sensor is embedded in the optical fiber modem, and a more dense, more efficient and more economical solution is provided for earthquake early warning and intensity rapid reporting.

Embodiments of the present disclosure relate generally to the field of communication between communicating devices and more particularly relates to a communication system for data transfer using human body communication. The communication system includes, a first communicating device to excite a conducting medium by transmitting electromagnetic (EM) signals to a surface of the conducting medium to generate a transmitter side resonance. Further, the communication system includes the conducting medium communicatively coupled to the first communication device via a body communication network. The conducting medium is configured to establish the broadband communication channel between the first communicating device and a second communicating device. Furthermore, the second communicating device comprising a receiver configured to receive the data as the EM signals transmitted from the first communicating device via the surface of the conducting medium.

The invention discloses a multi-photon phase detection method, device and system based on closed-loop quantum coherence and clock transition, and aims to solve the problems that the working frequency of an existing atom sensor is limited and the existing atom sensor is easily interfered by amplitude noise. According to the method, a closed ring is constructed in an atomic medium by applying a light field, a working alternating-current magnetic field and an auxiliary alternating-current magnetic field. The sum of the working frequency and the auxiliary frequency is set to be equal to the transition frequency of the first-order magnetic insensitive clock of the atom, so that decoupling of the working frequency to be measured and the inherent frequency of the atom is realized, and continuous tuning can be performed in a broadband range from Hertz to gigahertz. To-be-measured phase information is carried in a global phase of a closed loop, and is extracted by measuring an optical response signal and performing synchronous demodulation. According to the scheme, the self-consistency of the closed loop phase and the stability of clock transition are utilized, the influence of driving field amplitude noise and environment magnetic field fluctuation is effectively restrained, and the method is suitable for the fields of high-precision electromagnetic detection, broadband communication and the like.

Methods, systems, and devices for wireless communications are described. A network entity transmits capability information that indicates a capability of the network entity to participate in wideband communication through use of multiple single carrier waveforms, where each of multiple single carrier waveforms are associated with a corresponding sub-band of multiple sub-bands within the wideband communication. The network entity receives an indication that configures the network entity for participation in the wideband communication via the multiple single carrier waveforms and the plurality of sub-bands. The network entity receives scheduling information that schedules the wideband communication via the plurality of single carrier waveforms and the plurality of sub-bands. The network entity participates in the wideband communication via the multiple single carrier waveforms and the plurality of sub-bands.

The invention relates to the technical field of intelligent door locks, and particularly discloses a low-cost and low-delay intelligent door lock device based on an ultra-wideband transceiver, which comprises the ultra-wideband transceiver connected with two antennas facing the inside and the outside of a door respectively and used for distinguishing whether a paired intelligent key is inside or outside the door, the two antennas are respectively defined as an inner antenna and an outer antenna; the communication module is provided with a Bluetooth transceiver and an ultra-wideband transceiver at the same time, an additional antenna is used for Bluetooth communication, and the inner antenna and the outer antenna are used for ultra-wideband communication; the ultra-wideband transceiver is in a low-power-consumption sleep mode when no user approaches, and is awakened after being in communication handshake with a key through Bluetooth when a user appears or approaches. The double-antenna switching is realized in the same data frame, so that the delay caused by switching different antennas by using a plurality of data frames is avoided, the requirement that the delay from the time when a user reaches an effective range to the time when the unlocking is completed is less than 500ms can be met, and the non-sensitive experience of the user is improved.

The present disclosure provides a method for providing a service by using an ultra wide band (UWB) communication. The method for a first UWB device, according to an embodiment of the present disclosure, comprises the steps of: receiving a downlink time difference of arrival (DL-TDoA) message from at least one UWB anchor through a UWB channel; confirming on the basis of the DL-TDoA message that positioning of the first UWB device has failed; receiving a ranging message including position information about a second UWB device from the second UWB device; and measuring the position of the first UWB device on the basis of the DL-TDoA message and the position information about the second UWB device.

The invention belongs to the technical field of communication, and discloses a communication method and system based on broadband interference suppression and target signal reconstruction, and the method comprises the steps: collecting an original broadband communication signal; carrying out compressed sampling on the preprocessed signal to obtain compressed data; performing time-frequency domain conversion on the compressed data, and performing sparse representation on the signal by using the sparse dictionary to obtain time-frequency domain conversion data; reconstructing an original broadband communication signal from the time-frequency domain conversion data by adopting an iterative reconstruction algorithm and combining an interference suppression strategy, and eliminating an interference component to obtain a target signal; and comparing the quality index of the reconstructed target signal with a preset performance index, and dynamically optimizing at least one key parameter of compressed sampling, sparse representation, iterative reconstruction or interference suppression according to a comparison result. According to the method, a complex and changeable interference environment can be adaptively dealt with, it is ensured that the system always keeps the optimal processing effect, and the robustness is far better than that of a traditional method adopting fixed parameters.

The invention discloses a terminal equipment communication method and device, equipment, a medium and a program product. The terminal equipment communication method comprises the following steps: acquiring terminal equipment information of each to-be-communicated terminal in a to-be-communicated terminal set; the terminal equipment information comprises narrowband communication parameters and broadband communication parameters; based on the narrowband communication parameters, corresponding broadband communication parameters are sent to terminals to be communicated in a terminal set to be communicated in a narrowband communication mode; and in response to parameter confirmation messages fed back by the target to-be-communicated terminal in different time windows, sending a communication connection request to the target to-be-communicated terminal based on the target broadband communication parameters corresponding to the target to-be-communicated terminal, and establishing service communication based on a connection confirmation message fed back by the target to-be-communicated terminal. According to the technical scheme of the embodiment of the invention, the communication security can be improved, and the communication cost in a high-density scene can be reduced.

Proposed are a method and an apparatus for receiving a PPDU in a wireless LAN system. Specifically, a receiving STA receives a PPDU from a transmitting STA via broadband communication and decodes the PPDU. The PPDU is received on the basis of an OFDMA scheme. The PPDU includes a first signal field. The first signal field includes first information on a preamble puncturing pattern for each 80 MHz band in the broadband communication. The first information consists of a 4-bit bitmap for the 80 MHz band.

A waveguide assembly includes first and second waveguides. The first waveguide includes silicon, first and second ends, an end member, and a tapered member. The end member extends from the first end. The tapered member extends from the end member to the second end. The second waveguide is optically coupled to and spaced away from the first waveguide. The second waveguide includes silicon nitride, first and second members, and a non-tapered member. The non-tapered member extends from the first member to the second member and in parallel with and opposing the tapered member. An effective refractive index of the non-tapered member matches an effective refractive index of the tapered member at a first plane. The first plane extends through the non-tapered member and the tapered member and perpendicular to a second plane. The second plane extends parallel to a direction of overlap between the first and second waveguides.

Enhanced protocols and devices may be used to alleviate loss of spectrum efficiency in wideband transmission. The protocols may implement a wideband transmission opportunity (TXOP) truncation where one or more of the channels involved in communication over the wideband are released. In one scenario, an access point (AP) may receive, from a wireless transmit receive unit (WTRU), a first CF-End frame that includes a duration field and a basic service set identifier (BSSID) field that includes an individual / group bit. On a condition that the individual / group bit of the BSSID field has a value of one (1), the AP may determine that a scrambling sequence of the first CF-End frame indicates a bandwidth associated with a transmit opportunity (TXOP) being truncated by the WTRU. The AP may then transmit a second CF-End frame at the bandwidth indicated by the scrambling sequence of the first CF-End frame.

The embodiment of the invention relates to search space configuration for broadband communication. A method, a network node and a wireless device (WD) for search space configuration for broadband communication are disclosed. The method implemented by the WD includes monitoring the PDCCH at two time slots n0 and n0 + x, and wherein x is greater than one.

A method implemented by a first device operating in a communication system includes: obtaining a channel representation of a set of channels between the first device and a second device, wherein the set of channels corresponds to a set of subcarriers, the first device has multiple antenna ports, and the second device has one or more antenna ports; the first device determines one or more communication filters based on at least the channel representation; the first device applies the one or more communication filters to communication on at least one antenna port of the multiple antenna ports of the first device, wherein the communication is performed on the set of subcarriers.

The invention provides a low-altitude unmanned system air node optimal deployment method based on communication-link-energy consumption joint optimization. The method comprises the following steps: initializing an unmanned aerial vehicle group; the system constructs a performance model according to the real-time channel information, constructs a multi-objective collaborative optimization problem, and solves the multi-objective optimization problem by adopting an MOPSO-HGD algorithm to obtain an optimal result; deploying the unmanned aerial vehicle group to the optimal position according to the optimal result to form a virtual distributed MIMO array structure; setting an unmanned aerial vehicle electric quantity threshold value, judging the size of each unmanned aerial vehicle remaining electric quantity and the unmanned aerial vehicle electric quantity threshold value, and if the unmanned aerial vehicle remaining electric quantity is smaller than the unmanned aerial vehicle electric quantity threshold value, recycling the unmanned aerial vehicle; otherwise, re-determining the position of the unmanned aerial vehicle group; through a closed-loop control mechanism of channel perception-multi-target optimization-dynamic adjustment, the unmanned aerial vehicle relay system can still keep a high signal-to-noise ratio and strong robustness in a complex low-altitude environment, is suitable for scenes such as low-altitude broadband communication, emergency rescue and urban information networks, and has a good engineering application prospect.

The present disclosure provides a method for UWB session management. A method by which a first electronic device performs UWB communication, according to one embodiment of the present disclosure, may comprise the steps of: performing UWB ranging with a user device through a UWB session; determining, on the basis of the UWB ranging, whether movement of the UWB session to a second electronic device registered in the first electronic device is necessary; and, if it is determined that the movement of the UWB session to the second electronic device is necessary, transmitting UWB connection information about the second electronic device, wherein the UWB connection information can be used for connecting a UWB session between the user device and the second electronic device.

The invention discloses a real-time-delay-based programmable metasurface array antenna, which comprises a metasurface antenna array and a real-time-delay feed network, and is characterized in that the metasurface antenna array comprises 8 * 8 metasurface antenna units formed by first dielectric layers, metal plate layers and second dielectric layers, the first dielectric layers are integrated with 7 metal patches, a first diode and a second diode, and the second dielectric layers are integrated with 7 metal patches; the on-off state of the diodes is controlled through the direct current bias circuit, and 0-degree, 90-degree, 180-degree and 270-degree four-state phase regulation and control are achieved. The second dielectric layer comprises five metal patches which are matched with the through holes and the copper columns to realize upper and lower layer electric connection; the real time delay feed network adopts a 1: 8 * 8 power divider feed network, feeds by attaching a metal patch, and provides initial time delay related to the position for each unit. The method solves the problems of discrete phase quantization and frequency dispersion of a traditional array, is suitable for 5G / 6G broadband communication, dynamic beam tracking and other scenes, and remarkably improves the beam scanning precision and reliability.

The invention relates to the technical field of short-wave communication, and discloses a short-wave broadband frequency selection method, which realizes precise frequency selection of 12kHz / 24kHz broadband communication under the condition that traditional narrow-band short-wave equipment does not upgrade hardware through a cooperation mechanism of narrow-band detection signals and broadband ground noise monitoring. The method combines narrowband signal-to-noise ratio evaluation and broadband spectrum analysis, ensures that the selected frequency has optimal communication quality in both narrowband and broadband ranges, effectively solves the problem that traditional narrowband frequency selection cannot adapt to broadband services, has the advantages of environmental adaptation, high calculation efficiency, strong compatibility and the like, and is suitable for popularization and application. And the reliability and the economical efficiency of short-wave broadband communication are remarkably improved.

The invention discloses a communication method and device, a storage medium and equipment, and relates to the technical field of communication, and the method comprises the steps: in equipment comprising a broadband communication system and a narrowband communication system, when the broadband communication system meets a preset sleep condition, controlling the broadband communication system to enter a sleep state; when the narrowband communication system accords with a predetermined detection condition, switching to a candidate broadband working frequency point of the broadband communication system through the narrowband communication system for signal acquisition to obtain broadband frequency point data; detecting whether a broadband network signal exists on the broadband frequency point data; and if the broadband network signal exists on the broadband frequency point data, waking up the broadband communication system. According to the invention, the broadband communication system in the broadband and narrow converged communication equipment can reliably work as required, and the energy consumption of the broadband and narrow converged communication equipment is reliably reduced.

This invention discloses an integrated broadband communication and stereo remote sensing method based on multi-satellite cooperation. For a ground target area, a central satellite and several neighboring auxiliary satellites are selected from a low-Earth orbit (LEO) satellite constellation. Each satellite collaboratively transmits radio frames towards the joint beam coverage area. Ground users receive the shared pilot signal embedded in the radio frames to obtain channel state information and recover data. Simultaneously, the central satellite receives and stores the ground echo signal corresponding to the shared signal and performs channel estimation. Combining the Doppler center differences between echoes from different cooperating satellites, multi-view range image separation is achieved. Furthermore, a stereo synthetic aperture radar (SAR) imaging method is used to calculate the three-dimensional geographic coordinates of reflectors in the target area. This method achieves integrated collaboration of communication and remote sensing functions within a LEO satellite constellation, contributing to improved constellation resource utilization efficiency and three-dimensional observation capabilities of the target area.

In accordance with a first aspect of the present disclosure, an ultra-wideband (UWB) communication device is provided, comprising: a transmitting unit configured to initiate a device detection session by transmitting a pre-discovery message and to transmit, during the device detection session, at least one discovery message in order to discover one or more external devices; a receiving unit configured to receive, during the device detection session, one or more responses to the discovery message, wherein the responses have been transmitted by the external devices. In accordance with a second aspect of the present disclosure, a corresponding method of operating a UWB communication device is conceived.

The invention provides a bismuth-doped optical fiber and a preparation method and application thereof, the bismuth-doped optical fiber realizes C + L full-band positive gain through cooperation of Bi, Ge, La and Y and component proportion optimization: Bi is a core active component to form a BACS to generate near-infrared gain; la and Y improve the BACS concentration, inhibit non-radiation loss and enhance the gain efficiency; and the Ge adjusts the refractive index of the fiber core to guarantee stable optical transmission. According to the optimization, the problem of negative gain of the traditional BDF in the C + L wave band (especially 1524nm) is solved, the noise is reduced, and the practical value of broadband communication is improved.

The invention discloses a civil aviation data transmission system and method based on new generation aviation broadband communication, and belongs to the technical field of communication, the system comprises an air-space communication layer, an air operation layer, a land communication layer and a ground support layer, and the method comprises the following steps: dividing the transmission system into a general operation mode and an emergency operation mode according to whether an emergency occurs; dividing the collected flight data and cabin sound data, and further integrating the divided flight data to form five types of data sets; different data sets are transmitted through the air-space communication layer and the land communication layer based on different operation modes. By adopting the system and the method, four functions of real-time situation monitoring, scene reproduction on the ground, timely risk sensing and safe data storage are realized, and the breadth and depth of civil aviation safety capability and the real-time performance of data transmission are improved.

The invention provides an L-band-oriented broadband communication interference suppression method, system, equipment and medium, and relates to the technical field of aeronautical communication and navigation.The method comprises the steps that at a receiving end, interference detection based on continuous variance rejection is conducted on received OFDM frequency domain signals, an interference detection threshold is dynamically set, and interfered subcarriers are recognized; at a transmitting end, an anti-interference OFDM signal is generated by adopting a frequency diversity mode, and interference suppression is performed at a receiving end by utilizing a selection and combination method so as to recover a signal at the transmitting end; a compressed sensing model is constructed by using empty subcarriers in received signals, DME pulse interference signals are reconstructed based on the compressed sensing model, and DME interference is eliminated in a time domain. According to the method, the characteristic that a civil aviation route is fixed is fully utilized, the cognitive radio technology is adopted, the purpose of eliminating in-band interference is achieved through in-band interference detection and diversity suppression, and the influence on a DME system is reduced by adopting a boundary optimization interference elimination algorithm.

A communications circuit includes a first circuit block and a second circuit block. The first circuit block includes a first splitter, a first signal path coupled to a first output of the first splitter, a second signal path coupled to a second output of the first splitter, and a first switch configured to couple the second signal path to a third signal path or to couple a fourth signal path to the third signal path. The second circuit block includes a second splitter, a fifth signal path coupled to a first output of the second splitter, a sixth signal path coupled to a second output of the second splitter, and a second switch configured to couple the sixth signal path to the third signal path or to couple a seventh signal path to the third signal path. The third signal path extends between the first and second circuit blocks.

The utility model belongs to the technical field of network cable clamps, and particularly relates to a network cable fixing clamp for broadband communication, which comprises a positioning plate, a limiting belt is hinged to the positioning plate, a clamping groove is formed in the outer wall of the limiting belt, two side plates are fixedly connected to the top end of the positioning plate, one side of each side plate is connected with a sliding frame in a sliding manner, and the sliding frame is provided with a clamping groove. A connecting plate is fixedly connected between the two sliding frames, an adjusting plate is rotatably connected to the connecting plate, a pressure applying plate is fixedly connected to the bottom end of the adjusting plate, a push plate is slidably connected between the sliding frames, and a butt joint groove matched with the pressure applying plate is formed in the push plate; a connecting plate is supported through a sliding frame, an adjusting plate can adjust the corresponding positions of a pressure applying plate and a push plate, after the pressure applying plate is located between the sliding frame and the push plate, a limiting plate can be supported on a clamping groove at the moment, after the pressure applying plate corresponds to a butt joint groove, the limiting plate can be separated from the clamping groove, and then one end of a limiting belt can penetrate into a containing hole in a matched mode. The support blocks and the clamping plates support the support blocks.

The invention discloses an ATN B2 application system and method for civil aviation broadband communication, and belongs to the technical field of aviation broadband communication.The system comprises a user management module, a contract management module, a message management module, a data receiving and transmitting module and an interface operation module. The feasibility of an air-ground broadband communication system based on the ATN B2 standard is developed and verified; a set of relatively complete and efficient aviation broadband communication system and a corresponding method are developed by integrating a current data transmission network and a communication monitoring function design scheme.

The invention discloses an equipment working condition sensing signal wireless transmission method based on an ultra wide band and an electronic device, the method is applied to an ultra wide band signal sending end, and the method comprises the following steps: in a current superframe period, after waiting for a first waiting duration, sending a first data message of the ultra wide band signal sending end; if the second data message is received, determining a sending end timestamp synchronization source number of the next super-frame period, the last synchronization time of the sending end of the next super-frame period and the current timestamp of the sending end of the next super-frame period; and generating a to-be-sent data message of the ultra-wideband signal sending end of the next super-frame period based on the sending end timestamp synchronization source number of the next super-frame period, the latest synchronization time of the sending end of the next super-frame period, the current timestamp of the sending end of the next super-frame period and the sensor data frame of the next super-frame period. Therefore, ordered transmission and high-reliability receiving during multi-node ultra-wideband communication are realized.

Examples are provided that relate to satellites utilizing both a narrowband communication channel and a broadband communication channel. One example provides a satellite comprising narrowband communication hardware configured to communicate on a control plane over a narrowband communication channel using an omnidirectional antenna. The satellite further comprises broadband communication hardware configured to communicate on a data plane over a broadband communication channel using a beamforming antenna.

A satellite communication system includes a first frequency reference generator and a second frequency reference generator of a satellite or aircraft, a broadband communication receiving channel, and a broadband communication transmission channel. The first frequency reference generator generates a first frequency reference signal in a first frequency band. The broadband communication receiving channel for receiving broadband data at the satellite or aircraft using the first frequency reference signal, wherein a legacy satellite system comprises a legacy communication transmission channel for transmitting data from a legacy satellite in the first frequency band. The second frequency reference generator generates a second frequency reference signal in a second frequency band. The broadband communication transmission channel for transmitting broadband data from the satellite or aircraft using the second frequency reference signal, wherein the legacy satellite system comprises a legacy communication receiving channel for receiving data at the legacy satellite using the second frequency band.