140 results about "Broadband communication" patented technology

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 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.

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 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 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.

The invention discloses a broadband multichannel amplitude-phase error real-time compensation and synthesis method and system, relates to the technical field of broadband communication, and ensures that the amplitude-phase error of a full frequency band can be detected by injecting a broadband standard pilot signal which is completely matched with the bandwidth of a working signal; the standard pilot signal and the working signal are transmitted in the same path, and the amplitude-phase change of the standard pilot signal can truly reflect the error state of the working signal, so that the problem that the narrow-band pilot cannot cover the full-band error is solved; by monitoring the amplitude-phase error change rate, the updating period of compensation parameters is adaptively adjusted, and it is ensured that the compensation response speed is always higher than the error change speed; a real-time compensation parameter is generated based on the dynamic amplitude-phase error spectrum, so that the problem of lag failure of an offline parameter is avoided; a multi-frequency-point parallel processing mechanism is adopted, a broadband working signal is decomposed into a plurality of frequency components to synchronously execute amplitude-phase adjustment, the adjustment time consumption is consistent with that of a single-path signal, and compared with a traditional serial adjustment mode, the efficiency is improved, and the real-time processing requirement of the broadband signal is met.

The invention relates to a vehicle sentry mode implementation method and device, equipment and a storage medium, and the method comprises the steps that a sentry mode electronic control unit awakens an ultra-wideband communication module under the condition that a vehicle enters a sentry mode, and controls the electronic control unit to enter a dormant state; receiving detection data returned by the ultra-wideband communication module, and judging whether the vehicle is in a first environment state or not according to the detection data; the detection data is used for indicating whether a target object exists in a preset range of the vehicle; and under the condition that the vehicle is in the first environment state, the vehicle is controlled to exit the dormant state, first environment data of the vehicle are collected, and abnormal event monitoring is conducted based on the first environment data. And after the vehicle enters the sentry mode, the sentry mode electronic control unit enters a dormant state, the ultra-wideband communication module is awakened to carry out environment monitoring, and the sentry mode electronic control unit is awakened until it is detected that the vehicle is in the first environment state, so that the overall power consumption of the sentry mode is reduced.

The invention belongs to the technical field of digital signal processing, and particularly relates to a low-complexity segmented filtering method based on a bilateral overlap-save method in a broadband communication system. Aiming at the problem of realizing a large-scale finite impulse response filter in a hardware platform with a limited Fourier transform size, the method comprises the following steps of: dividing a long filter into a plurality of sub-segments and respectively performing frequency domain representation; the method comprises the following steps: performing bilateral overlapping storage on input signal blocks, performing fast Fourier transform, introducing phase shift in a frequency domain to realize time shift, further accumulating frequency domain product results of each filter section and a signal block, and finally obtaining filtering output only through one-time inverse fast Fourier transform. According to the method, the inverse fast Fourier transform operation times are remarkably reduced, the calculation complexity and the storage requirement are greatly reduced, the filtering performance is kept, meanwhile, excellent hardware friendliness is achieved, and the method is particularly suitable for occasions needing an ultra-long filter, such as optical fiber communication dispersion compensation processing.

According to a first aspect of the present disclosure, there is provided an ultra- wideband communication node, comprising: an ultra-wideband communication unit configured to transmit one or more messages to a plurality of external responder nodes, and to receive one or more responses from the responder nodes; a processing unit configured to encrypt the messages using a common cryptographic session key, wherein the common cryptographic session key is a key shared between the ultra-wideband communication node and all of the external responder nodes; wherein the processing unit is additionally configured to decrypt the responses and / or to encrypt further messages to the responder nodes using responder-specific cryptographic session keys, and wherein each individual key of the responder-specific cryptographic session keys is a key shared between the ultra-wideband communication node and one of the external responder nodes.

The invention relates to the technical field of wireless, and provides a cavity-backed circularly polarized antenna. The cavity-backed circularly polarized antenna comprises a resonant cavity, the top layer of the resonant cavity is etched with a radiation structure, and the radiation structure is used for generating an inherent circularly polarized resonance point; at least one resonant structure is arranged in the resonant cavity, the at least one resonant structure is used for generating an additional circularly polarized resonant point, and the at least one resonant structure is electromagnetically coupled with the radiation structure, so that the inherent circularly polarized resonant point and the additional circularly polarized resonant point interact to widen the circularly polarized bandwidth. According to the invention, the axial ratio bandwidth is effectively expanded so as to meet the requirements of a modern broadband communication system.

The invention discloses an unmanned aerial vehicle control method, electronic equipment, a storage medium and a system. The method comprises the following steps: acquiring state data and environment data of an unmanned aerial vehicle through a flight control module; the state data and the environment data are transmitted to an edge computing power module through a first communication link, and the first communication link is a broadband communication link; the state data and the environment data are processed through an edge computing power module, and a decision instruction is generated; the decision instruction is sent to a flight control module through a second communication link, and the second communication link is a real-time communication link; and executing the decision instruction through the flight control module to drive an execution mechanism of the unmanned aerial vehicle.

The present disclosure provides a method by which an electronic device classifies a pose by using a UWB signal. The method of the present disclosure may comprise the steps of: using a trained first CNN model so as to acquire first prediction data for classifying whether a signal corresponding to a UWB CIR is a LOS signal or an NLOS signal on the basis of UWB CIR data; using, if the signal is classified as the LOS signal, a trained second CNN model so as to acquire second prediction data for classifying a pose on the basis of sensor data corresponding to the UWB CIR data; using, if the signal is classified as the NLOS signal, a trained third CNN model so as to acquire third prediction data for classifying the pose on the basis of the sensor data corresponding to the UWB CIR data; using a first filtering method so as to filter at least two from among the first prediction data, the second prediction data, and the third prediction data; and classifying the pose on the basis of the filtered data.

The invention discloses a service sending method, a service receiving method and a related device based on a narrowband base station, relates to the field of communication, and specifically, a terminal user unit supporting broadband communication and narrowband communication can send a communication service according to a service type and broadband and narrowband network conditions monitored by dual networks when sending the communication service. And selecting a target network and sending the communication service through the target network. Compared with a scheme in which a narrowband network bears all services, the method and the device have the advantages that the purpose of sending different types of services by using different networks can be achieved, and on the basis, when the terminal needs to send a certain communication service, even if the terminal exceeds the coverage range of the narrowband network or narrowband channel resources are completely occupied, the terminal can send the communication service. And the terminal user unit can still use the available broadband network to establish communication, so that the limitation of limited coverage area of the narrowband private network and limited narrowband network resources on the terminal service is broken through to a certain extent.