422 results about "Radio frequency communication" patented technology

The invention discloses a microwave radio frequency link multi-index comprehensive measurement method, and relates to the technical field of radio frequency communication testing, and the method comprises the following steps: S001, building a peak power prediction model, generating a peak power probability curve based on the statistical distribution characteristics of a plurality of carrier signals, and forming a peak early warning vector containing an estimated time point and an amplitude value; and S002, executing synchronous sampling scheduling according to the peak early warning vector, and by adjusting a sampling trigger threshold and a time window parameter, enabling a sampling window to aim at peak power occurrence time and cover a time interval of amplitude limiting protection. According to the method, through peak value prediction, accurate sampling, multi-dimensional difference and distortion identification, efficient capture and dynamic regulation and control of amplitude limiting abnormity are realized, a prediction-identification-adjustment-optimization closed-loop process is constructed, the monitoring integrity and adaptive capacity of a microwave radio frequency link to sudden distortion are remarkably improved, and stable operation of a system is guaranteed.

The invention provides an unmanned aerial vehicle intrusion real-time interception method and system based on an airspace electronic fence. The method comprises the steps of firstly obtaining real-time flight monitoring data of an unmanned aerial vehicle in a target airspace, then analyzing predefined airspace electronic fence configuration information to generate a virtual boundary constraint set, and then combining three-dimensional space coordinates and the virtual boundary constraint set to judge whether the unmanned aerial vehicle invades a no-fly zone or not. When it is judged that the unmanned aerial vehicle invades the no-fly zone, a collaborative interception instruction sequence is generated, finally, the collaborative interception instruction sequence is sent to the unmanned aerial vehicle through a radio frequency communication link, the unmanned aerial vehicle is driven to execute flight path correction, and real-time interception of the unmanned aerial vehicle is completed; according to the technical scheme, the real-time performance and safety of sensitive airspace protection are improved, meanwhile, the risk of mistakenly intercepting legal aircrafts is avoided, and non-lethal precise expelling is completed on the premise of completely eradicating the crash risk.

The invention relates to the technical field of wireless communication, and discloses a compensation method for electronic radio frequency communication. According to the compensation method for the electronic radio frequency communication, the radio frequency signal and the channel state information are acquired, the original data set is generated, and the preprocessing steps of denoising, signal amplitude correction, phase correction and the like are performed, so that the data quality is improved, accurate parameter evaluation is performed by adopting the minimum mean square error, the accuracy of channel characteristic parameters is ensured, and the communication quality is improved. A mathematical model constructed based on the parameters enables calculation of compensation parameter gain and phase deviation to be more accurate, so that attenuation and distortion caused by signal propagation in a channel are effectively compensated, and finally, quality evaluation is carried out on the bit error rate and the signal-to-noise ratio of the compensated signal, so that the compensation effectiveness is ensured, and the signal quality is improved. And if the compensation is invalid, the calculation can be returned in real time for recalculation, so that the quality of the whole signal is improved.

The invention discloses a bulk acoustic wave filter, a preparation method thereof and a radio frequency module. The bulk acoustic wave filter includes at least: a substrate; the first film layer is located on one side of the substrate, the first film layer comprises a first area and a second area surrounding the first area, and a photosensitive dry film surrounding the first area is arranged in the second area; the piezoelectric film is positioned on one side, far away from the substrate, of the first film layer; wherein the piezoelectric film comprises a lithium niobate film and / or a lithium tantalate film; and the substrate, the photosensitive dry film and the piezoelectric film jointly form a cavity. According to the bulk acoustic wave filter, the photosensitive dry film is introduced and serves as the supporting layer and the sacrificial layer, the effect of supporting the lithium niobate thin film and / or the lithium tantalate thin film is achieved, and the effect of sacrificing part of the photosensitive dry film to form the cavity is achieved; and meanwhile, by utilizing the flexibility of the photosensitive dry film, the limitation on the lithium niobate and / or lithium tantalate crystal phase can be reduced, so that the application range of the lithium niobate film and / or lithium tantalate film in the radio frequency communication field is widened.

The utility model relates to the field of radio frequency communication equipment processing, in particular to a punching device for a shielding cover of radio frequency communication equipment. The punching device for the shielding cover of the radio frequency communication equipment comprises a machine frame, a connecting frame, a hydraulic rod, an installation frame, a punching frame and a placing plate, the top of the machine frame is connected with the connecting frame, the hydraulic rod is installed in the connecting frame, the telescopic end of the hydraulic rod is connected with the installation frame, the punching frame is placed in the installation frame, and the placing plate is installed on the machine frame. When a hydraulic rod shakes in the starting process, a limiting frame and a sliding rod can be extruded, a built-in button is triggered, and after the button is activated, the system can immediately inform an operator that the hydraulic rod shakes abnormally and prompt that inspection and maintenance need to be conducted, and can also automatically start an air pump to rapidly inflate an air bag; the air bag expands and tightly wraps the hydraulic rod, instant stable support is provided, shaking is effectively reduced, and safety and stability of equipment operation are guaranteed.

The invention provides a dual-mode-based low-voltage power grid state information management method and a dual-mode-based low-voltage power grid state information management system, belongs to the field of power line carrier communication, and solves the problem that the bit error rate is still high in some scenes. The method comprises the following steps: acquiring control harmonic characteristic parameters of grid-connected inverter equipment in a transformer area and physical layer state parameters of a high-speed power line carrier communication channel in the high-speed power line carrier communication channel; on a concentrator side or an edge node side, constructing an error rate risk assessment model based on the control harmonic characteristic parameters and the physical layer state parameters so as to identify a link risk state in which feedforward gain limitation and spectrum migration need to be executed; the method comprises the following steps: under the condition of determining that a control harmonic wave causes selective desensitization of a high-speed power line carrier communication front end based on a link risk state, applying feed-forward gain limitation to a high-speed power line carrier communication channel, and migrating a high-risk subcarrier to a low-risk frequency band; and a bypass relay path is established through the high-speed wireless radio frequency communication channel so as to transmit key data in the execution period.

The utility model discloses an Internet of Things tunnel interval controller combined with a digital microwave radar, and the controller comprises a radar module which is used for obtaining traffic flow information in a non-contact manner; the control module is used for executing logic judgment and generating a control instruction according to the traffic flow information acquired by the radar module; the data storage module is used as a nonvolatile storage space of the Internet of Things tunnel interval controller; the radio frequency communication module is used for realizing networking and remote management through an Internet of Things communication protocol; the power supply module is used as a power supply basis of the Internet of Things tunnel interval controller, and the power supply module is connected with the radar module, the control module, the data storage module and the radio frequency communication module; a tunnel interval control solution with high integration level, accurate vehicle detection, intelligent dimming decision, flexible wireless communication and high-reliability data management is jointly realized.

Bidirectional variable gain amplifiers (VGAs) for radio frequency (RF) communication systems are provided. In certain embodiments, a bidirectional VGA includes a first amplifier having an input coupled to a transmit / receive port, a second amplifier having an output coupled to a transmit port, a third amplifier having an input coupled to a receive port, a fourth amplifier having an output coupled to the transmit / receive port and to the input of the first amplifier, and a switch circuit that connects an output of the first amplifier to an input of the second amplifier in a transmit mode, and that connects an output of the third amplifier to an input of the fourth amplifier in a receive mode.

A radio frequency communication filter based on voltage tuning comprises an LC low-pass filter composed of a first set of parallel variable capacitance diode units, a second set of parallel variable capacitance diode units and an inductor L2, and an RC high-pass filter which is adjusted along with a tuning voltage control end VT and composed of a capacitor C2, a variable capacitance diode V17, a variable capacitance diode V18, a capacitor C4 and a resistor R2. A third group of parallel variable capacitance diode units, a fourth group of parallel variable capacitance diode units and an inductor L3 form an LC low-pass filter, and a capacitor C3, a variable capacitance diode V20, a variable capacitance diode V19, a capacitor C5 and a resistor R2 form another RC high-pass filter which is adjusted along with a tuning voltage control end VT. And the two band-pass filters are connected to form a high-selectivity and low-insertion-loss adjustable band-pass filter driven by the same controllable tuning voltage control end.

According to some exemplary aspects, a tracker circuit includes at least a terminal configured to receive a first regulating voltage from a first converter circuit that is configured to convert an input voltage to the first regulating voltage. The tracker circuit also includes a second converter circuit configured to generate a plurality of discrete voltages based on the first regulating voltage and a first supply modulator configured to selectively output at least one of the plurality of discrete voltages to a first power amplifier. The first regulating voltage is provided to a second power amplifier without passing through the second converter circuit.

The embodiment of the invention provides a packaging chip, a radio frequency communication module and communication equipment, and is applied to the technical field of semiconductor packaging. The package chip includes a wafer. The packaging chip further comprises at least one first attenuation element and at least one first tuning element, the first attenuation element is an equivalent capacitor or an equivalent resistor, and the first tuning element is an equivalent capacitor, an equivalent inductor or an equivalent resistor. Wherein the wafer is provided with a filtering structure, and the filtering structure comprises a first filtering resonance structure. The at least one first attenuation element is connected with the first end and the second end of the first filtering resonance structure so as to form a parallel structure with the first filtering resonance structure. The first end of each first tuning element is connected to a transmission path formed by the first end and the second end of the first filtering resonance structure and the at least one first attenuation element, and the second end of each first tuning element is grounded. According to the embodiment of the invention, the suppression degree and / or isolation degree of the filter device are / is greatly improved on the basis of not increasing the signal insertion loss.

The utility model relates to the technical field of millimeter wave radio frequency communication, and discloses a broadband millimeter wave dual-channel receiver, which comprises two receiving links and a power divider, each receiving link is connected with the power divider, each receiving link comprises an isolator, a frequency mixer and an intermediate frequency amplifier which are sequentially connected from input to output, one input end of the frequency mixer is connected with a frequency multiplier, and the input end of the frequency multiplier is connected with one output end of the power divider; according to the utility model, mutual interference of multiple paths of signals in a test can be effectively prevented, two paths of millimeter wave radio frequency signals can be tested and analyzed at the same time, and the device can be used for various test scenes such as down-conversion test, two paths of radio frequency signal amplitude-phase consistency test, noise coefficient test and the like.

The invention relates to the fields of information electronic material technology, information communication, wireless radio frequency communication and the like, in particular to a surface acoustic wave device and a preparation method thereof.The preparation method comprises the steps that after a metal film is deposited, patterned stripping is conducted on an interdigital electrode layer, and when patterned stripping is conducted on the interdigital electrode layer, a non-closed release window is formed; partially overlapping the thickened electrode layer from the direction of the non-closed release window to form a closed release window; etching the piezoelectric film exposed in the closed release window to form a release hole; and the sinking material is further released through the release holes so as to form a suspended piezoelectric film. According to the invention, by optimizing the patterning design and the processing flow of the resonator membrane structure, the release window in the bus bar region is efficiently stripped, the stripping processing difficulty of the bus bar electrode is reduced, and the stripping success rate of the bus bar electrode is improved.

An AI decision based multiple telecommunication endpoints system is provided, including a telecommunication endpoint device and an artificial intelligence decision controller. The telecommunication endpoint device performs a communication test with the radio frequency communication device under test. The artificial intelligence decision controller is electrically connected to the telecommunication terminal device to control the communication test, and performs an efficiency analysis on the result of the communication test, and generates a decision instruction according to the result of the efficiency analysis. The artificial intelligence decision controller can centrally control, replace and analyze multiple artificial intelligence modules and generate a large number of telecommunication endpoints device signal sending and receiving behaviors, providing a telecommunication endpoints system with self-adaptive adjustment process, parameters, result analysis and reasonable cost as a test for the development phase, deployment phase, or maintenance phase of the telecommunications equipment product development process.

The cognitive communication system comprises a spectrum sensing unit, an intelligent cognitive communication decision module, a reconfigurable optical local oscillator generation module, a digital signal processing module, a cognitive communication receiving end and a cognitive communication transmitting end. The cognitive communication receiving end comprises a communication receiving radio frequency processing module, a photon radio frequency communication receiving module and a communication receiving intermediate frequency processing module; the cognitive communication transmitting end comprises a communication transmitting radio frequency processing module, a photon radio frequency communication transmitting module and a communication transmitting intermediate frequency processing module; the photon radio frequency communication receiving module converts a radio frequency signal into an optical carrier wave through optical carrier wave modulation, and down-converts the optical carrier wave into an intermediate frequency by using a reconfigurable optical local oscillator signal; the photon radio frequency communication transmitting module converts an intermediate frequency signal into an optical carrier through optical carrier modulation, and performs up-conversion to a radio frequency by using a reconfigurable optical local oscillator signal. According to the invention, through deep fusion of the photon technology and cognitive communication, the bandwidth, flexibility, anti-interference capability and dynamic reconstruction capability of the system are significantly improved.

The invention provides a'vision + behavior 'information transmission method, which is characterized in that interactive nodes on a data chain are regarded as intelligent agents, a machine observes behaviors of other machines through a photoelectric sensor and receives and accepts information transmitted by the other machines, and data chain information flow is established on a'vision + behavior' information transmission mode. According to the invention, the interaction mode of the data link is innovated, the serious dependence of the data link on radio frequency communication is reduced, and the novel consensus capability of electromagnetic-wave-free communication of the data link is realized. The data chain works in a spectral domain comprising visible light and invisible light, is not decoy and interfered by electromagnetism, and can face strong electromagnetic interference or transmit information under complete rejection. The problem that use of the data chain is limited in a denial environment is innovatively solved, thoughts are expanded for the data chain to seek electromagnetic breakthrough, and the concept category of the data chain is developed.

The invention aims to provide an unmanned aerial vehicle radio frequency individual hijacking identification system fusing multi-source federal learning and multi-mode perception. The multi-modal data acquisition and preprocessing module, the local feature extraction and initial discrimination module and the multi-modal fusion and hijacking risk assessment module form a front-end detection link deployed at an unmanned aerial vehicle end and / or an edge node; the multi-source federated learning and global model aggregation module, the security and privacy protection module and the online sample acquisition and adaptive updating module form a rear-end training link deployed in a cloud supervision center, and the rear-end training link and the security and privacy protection module form an end-edge-cloud collaborative unmanned aerial vehicle hijacking recognition closed-loop system. And a federated learning system for deep fusion of multi-modal data such as flight control, radio frequency communication, airborne vision and ground trajectory can be formed.

The invention discloses a carrier communication module for dual-mode intelligent cooperative communication, and relates to the technical field of communication modules, the carrier communication module comprises a high-speed power line carrier unit, a wireless radio frequency communication unit and a control unit, the high-speed power line carrier unit and the wireless radio frequency communication unit are both electrically connected with the control unit, according to the carrier communication module for dual-mode intelligent cooperative communication, dual-mode communication is realized through cooperative use of the high-speed power line carrier unit and the wireless radio frequency communication unit, the robustness and the self-healing capability of a network are greatly enhanced through the dual-mode design, and when a certain path (carrier or wireless) is interrupted, the communication efficiency is improved. A replacement path can be quickly searched through another mode or a network relay node, communication is ensured not to be interrupted, a dual-mode communication mechanism thoroughly solves the problem that a single communication mode is easy to fail in a complex power utilization environment, and non-blind area communication, high data reliability and high acquisition efficiency are realized.

The present application provides a radio frequency communication system, comprising: a first power amplifier (PA), a first low noise amplifier (LNA), a second LNA, a first switch, a first filter, and a second filter. The first switch comprises a connecting end, a first switching end, and a second switching end; the first filter is connected to the connecting end of the first switch, an output end of the first PA is connected to the first switching end of the first switch, and an input end of the first LNA is connected to the second switching end of the first switch; the first switch is configured to connect the connecting end of the first switch to the first switching end of the first switch, or to connect the connecting end of the first switch to the second switching end of the first switch, so as to switch the first PA to a first transmit channel of the first filter and switch the first filter to a first receive channel of the first LNA; the second filter is connected to an input end of the second LNA to form a second receive channel. The radio frequency communication system provided by the present application can achieve flexible application of the spectrum of the radio frequency communication system.

The invention discloses a receiver direct current offset calibration method and device, a storage medium and a program product, and relates to the technical field of radio frequency communication, and the method comprises the steps: detecting a direct current component in a signal received by a receiver through an analog-to-digital converter; judging a calibration mode according to a user-defined calibration method; if the calibration mode is offline calibration, a foreground calibration mode is adopted to calculate a current compensation coefficient through an adaptive algorithm, and if the calibration mode is online calibration, a background calibration mode is adopted; obtaining a compensation signal after compensation of direct current offset through the direct current offset signal and the current compensation coefficient; the compensation coefficient of the next clock period is updated through the adaptive algorithm iteration coefficient and the compensation signal; and iterating the compensation coefficient according to an internal counter of the adaptive algorithm, determining a final compensation coefficient, and outputting a calibration signal after calibration direct current imbalance. According to the invention, the system complexity is effectively reduced through the compensation module and the adaptive algorithm so as to calibrate the direct-current offset of the receiver, and the calibration time is shortened.

The invention discloses a building cluster cloud-edge collaborative optimization control method and device and an application architecture. The architecture comprises an edge device, a radio frequency communication LoRa module and a cloud platform. The edge device and the cloud platform realize cloud edge two-way communication through the LoRa module; the edge device comprises a sensing layer, an edge calculation core and a control layer and is used for collecting real-time building data, executing a local model predictive control algorithm MPC based on a building thermodynamics RC model and generating an optimal control instruction to drive air conditioning equipment; the cloud platform comprises a network service interface module, an optimization algorithm module and a data storage system and is used for operating a global coordination algorithm based on an alternating direction multiplier method (ADMM) and generating differentiated price signals; the edge device uploads data such as power requirements to the cloud platform, the cloud platform issues differential excitation signals to the edge device, and the edge device and the cloud platform perform collaborative iteration. According to the invention, distributed optimization control of the building cluster is realized through cloud-side cooperation, and the value of the building cluster as a power grid flexible resource is significantly improved.

Radio frequency (RF) communication systems with interference cancellation for coexistence are provided herein. In certain embodiments, an RF communication system includes a transmitter including a power amplifier that amplifies an RF transmit signal, a receiver including a low noise amplifier (LNA) that amplifies an RF receive signal, and an interference cancellation circuit that selects a bandpass filter from a plurality of bandpass filters to filter the RF transmit signal after amplification by the power amplifier. The selected bandpass filter operates in combination with a controllable gain circuit and a controllable phase circuit to generate an analog interference cancellation signal that is injected into the receiver to compensate the RF receive signal for interference arising from the transmitter.

The invention discloses a transceiving full-duplex dual-mode three-beam radio frequency component architecture and system, relates to the technical field of radio frequency communication and radar perception integrated front ends, and comprises the following steps: improving the stability of a system power-on process by combining an FPGA (Field Programmable Gate Array) unified trigger mechanism with graded power-on time sequence control of a radio frequency switch, a power amplifier and an LNA (Low Network Alliance); flexible reconstruction of channels 1-4 is realized through combination of a 2 * 2 switch matrix structure and dynamic interconnection of a circulator and a dual circular polarization port, real-time rotation of a polarization state and dynamic adjustment of a beam main lobe direction are realized through combination of a Berry geometric phase algorithm and a dual-stage regulation and control strategy of a reflection array rotation element, the flexibility of beam generation is improved, and the beam generation efficiency is improved. The dual-mode polarization reflection array is combined with the full duplex circulator and the time sequence control module, so that three polarization combination modes under the same hardware platform are realized, and the polarization multiplexing efficiency of the communication system is improved.

An apparatus of the subject technology includes a first device in radio frequency communication with a plurality of second devices. The first device includes a transducer and a processor. The transducer measures an elevation of the first device with respect to a device of the second devices. The processor determines possible values of a three-dimensional (3D) position of the first device and selects one of the possible values as the 3D position of the first device based at least on the measured elevation.

The invention belongs to the technical field of integrated circuits, and discloses a high-selectivity constant-bandwidth reconfigurable filter chip based on a GaAs (gallium arsenide) process, which comprises a dielectric substrate, a multilayer metal structure, a plurality of folded opening-shaped metal microstrip lines, a plurality of grounding metal columns, a variable capacitance diode, an MIM (metal injection molding) capacitor and the like. Resonance is realized in a mode of combining electric coupling and magnetic coupling, a variable capacitance diode is utilized to tune the center frequency, and the bandwidth is kept constant in the tuning process. Transmission zeros are introduced at two sides of a passband through cross coupling, so that the frequency selectivity and the spectrum management capability are remarkably improved, and meanwhile, the optimization of the microstrip interconnection structure effectively reduces the system loss. According to the invention, the strict requirements of a modern radio frequency communication system on miniaturization, high performance and high selectivity can be met, and extremely high adjustability and adaptability are achieved.

The invention discloses a communication system and a communication method based on a solar communication cap, the communication system comprises a cap main body, and a solar charging panel is embedded in the brim of the cap main body; the communication module comprises a Bluetooth communication unit, a radio frequency communication unit and a signal processing unit, and the communication module is used for transmitting and receiving voice signals through an external antenna; the power supply system is connected with the solar charging panel and is provided with a charging management unit; the noise reduction audio unit comprises a main microphone, an auxiliary microphone and a noise reduction algorithm module; and the networking control unit comprises a first function module and a second function module. Basic functions of the cap are combined with wireless communication, noise reduction audio and solar charging technologies, so that multifunctional integration, self power supply and noiseless voice transmission of equipment are realized, and the problems of inconvenience in carrying, short endurance, signal interference and the like of traditional equipment are solved.

Communication method, comprising the following first steps, implemented by a current node (300): During a first phase: The current node (300) being in a receive mode via a channel (c2), the channel being a half-duplex radio frequency communication channel, thenReception, via the channel (c2), of a first discovery message (d1) including an identifier (P1) of a parent node (100), then, memorization of said identifier of the parent node, and:First passage of the current node (300) into a transmit mode, thenTransmission, via the channel (c2), of a second discovery message (d2) including an identifier (P2) of the current node (300), Then, during a second phase:Determination of a time slot, then:During the time slot, transmission, via the channel (c2), of a first data message in memory destined for the parent node (100). Figure for the abridged version: Fig. 1

Various example embodiments relate to radio frequency communications. A device may comprise: a base layer comprising at least one antenna cavity with at least one antenna element; and a metallic cover layer comprising a plurality of metallic fragments separated by dielectric material, wherein a width of the plurality of metallic fragments at an inner surface of the metallic cover layer disposed towards the base layer is smaller than the width of the plurality of metallic fragments at an outer surface of the metallic cover layer disposed away from the base layer.

The invention discloses a lightning protection device of a radio frequency communication system, the radio frequency communication system comprises a board card and a casing, the board card is provided with a board card ground, and the casing is provided with a casing ground; the protection device comprises a first lightning protection circuit; the first lightning protection circuit comprises a surge discharge circuit and an isolation circuit; the isolation circuit is connected between the board card ground and the machine shell ground. The isolation module is used for isolating a board card ground from a shell ground; the surge discharge circuit is connected between the board card ground and the machine shell ground and used for guiding the lightning stroke surge signals into the machine shell ground through the board card ground. According to the invention, the surge discharge circuit is additionally arranged on the basis of high-voltage isolation of the board card ground and the case ground, so that the problems that isolation between the board card ground and the isolation ground cannot be realized at the same time and a complete signal ground plane is used as a backflow path when a lightning stroke surge protection measure is taken by the radio frequency antenna at present are solved.

A method of controlling a receiver of radio frequency communications includes intervals between the reception of a data packet header and an acknowledgement sent by the receiver being constant, and, once a packet has been correctly received, circuits of the receiver are put into standby for a duration corresponding to the interval after each reception of a header of same rank as that of the correctly received packet.