342 results about "Frequency Unit" patented technology

Disclosed are a method and a device for multi-frequency unit-based simultaneous transmission or simultaneous reception in a wireless communication system. A method for performing uplink transmission or downlink reception by a terminal in a wireless communication system according to an embodiment of the present disclosure may comprise the steps of receiving, from a network, configuration information related to a group of frequency units for one or more of an uplink and a downlink; and on the basis of one or more of a reference signal-related resource and a channel-related resource for a first frequency unit and a second frequency unit included in the group of frequency units, performing, in the same time unit, uplink transmission or downlink reception on the first frequency unit and the second frequency unit, wherein the first frequency unit and the second frequency unit at least partially overlap on a frequency domain.

According to the control method of the Si IGBT and SiC MOSFET mixed frequency parallel system, when an open-circuit fault occurs in the SiC MOSFET high-frequency unit, the Si IGBT low-frequency unit works independently; under the light load working condition within the safe working range of the device, the SiC MOSFET high-frequency unit works independently; under the normal working condition, the Si IGBT low-frequency unit and the SiC MOSFET high-frequency unit share a common direct-current power supply and work in a coordinated mode, the Si IGBT low-frequency unit processes large power, the SiC MOSFET high-frequency unit compensates switch ripples generated by the Si IGBT low-frequency unit, specifically, the SiC MOSFET high-frequency unit adopts mQPR control and compensates third to twenty-third harmonic waves generated by an LFU, the Si IGBT low-frequency unit adopts SHEPWM control, the third to thirteenth harmonic waves generated by the Si IGBT low-frequency unit are reduced, and the switching ripple waves generated by the Si IGBT low-frequency unit are reduced. Therefore, the capacity requirement on the HFU is reduced.

Example precoding vector indication methods, precoding vector determining methods, and communications apparatus to reduce feedback overheads are described. One example method includes generating and sending a channel state information (CSI) report by a terminal device. A network device determines a precoding vector of one or more frequency domain units based on the CSI report. The CSI report is used to indicate M space-frequency units and a weighting coefficient of a part or all of the M space-frequency units, each of the M space-frequency units corresponds to one beam vector and one frequency domain vector, and a weighted sum of the part or all of the M space-frequency units is used to determine the precoding vector of the one or more frequency domain units.

The proposed solution concerns a drive system for an electric bicycle, comprising a bottom bracket shaft for applying rider torque with a rider cadence for generating drive power for muscle-powered propulsion of the electric bicycle, at least one drive motor for providing externally generated support power in addition to the drive power depending on at least one operating parameter, a frequency unit for determining the rider cadence and a torque unit for determining the rider torque.The drive system also includes an electronic control unit for determining at least one operating parameter based on the rider's cadence and torque. This control unit comprises a filter unit configured to filter one or more values ​​of the rider torque based on the rider's cadence to determine a filtered rider torque value. It also includes an evaluation unit configured to determine the at least one operating parameter from a predefined map, which is at least two-dimensional, based on the filtered rider torque and the rider's cadence. The proposed solution also relates to a method for determining at least one operating parameter.

The invention discloses a receiving anti-interference gain control method of a satellite internet radio frequency unit, which belongs to the field of communication, and comprises the following steps of: detecting the total signal power in a full bandwidth and the effective signal power in a target bandwidth in real time in the operation process of equipment, and when the total signal power exceeds a set power threshold and enters a saturation state, sending the effective signal power to the satellite internet radio frequency unit; the total signal power is controlled below the threshold power by adjusting the attenuation amount of the attenuator, and saturation of a receiving channel is prevented; meanwhile, the difference value between the total signal power and the effective signal power is detected, when the difference value exceeds a set threshold value, it is judged that strong out-of-band interference exists, and useful signal attenuation caused by suppression of the out-of-band interference is compensated by adjusting the digital gain DigialGain.

The present disclosure relates to the technical field of earphone equipment, and describes a hybrid dual unit earphone, comprising an earphone casing, an inside cavity arranged in the earphone casing, a sound output port configured to communicate with the inside cavity and provided on the earphone casing, an independent sound guiding cavity arranged in the inside cavity, wherein an opening of the sound guiding cavity is arranged toward the sound output port; a dynamic unit component comprising a dynamic speaker arranged in the inside cavity, where the sound output direction of the dynamic speaker is set towards the sound output port; a high-frequency unit component comprising a high-frequency speaker arranged in the sound guiding cavity, where the sound output direction of the high-frequency speaker is set towards the sound output port.

The invention relates to the technical field of array antennas, and discloses a common-caliber layout-based ultra-wideband array antenna, which comprises a low-frequency unit and a high-frequency unit which are arranged based on a common caliber, and is characterized in that the working frequency of the low-frequency unit covers an fmin-f0 frequency band, and the working frequency of the high-frequency unit covers an f0-fmax frequency band. The low-frequency unit is a broadband dual-polarized antenna, a uniform tight coupling array distributed at equal intervals is formed by adopting a tight coupling principle, and the unit interval is calculated based on a grating lobe suppression condition at the frequency f0. The high-frequency unit is a miniaturized broadband dual-polarized antenna and adopts a sparse array form; the initial unit spacing and the unit number of the sparse array are calculated based on the grating lobe suppression condition at the highest frequency f2 of the f1-f2 frequency band with the side lobe requirement between the f0-fmax frequency bands. The ultra-wideband array antenna gives consideration to full-band array performance, can provide sufficient space for active circuit arrangement, and effectively reduces power consumption and cost.

A communication method and apparatus are provided. The method includes: A network device sends first information to a terminal device in a first frequency unit, the terminal device receives the first information from the network device in the first frequency unit, the first information indicates a first periodicity in which the network device sends common information in a second frequency unit, and the terminal device detects the common information in the second frequency unit based on the first periodicity. A detection periodicity of a common signal is flexibly configured, so that efficiency of detecting the common information by the terminal device can be improved, flexibility of initial access to the network device performed by the terminal device can be improved, and user experience can be improved.

The invention discloses a network system which is applied to meet the requirement of high-altitude airport rate. In the network system, the connection between the plurality of baseband units and the plurality of antenna radio frequency units is realized by designing the forwarding equipment, so that messages related to the plurality of antenna radio frequency units can be processed by the plurality of baseband units, the baseband processing capability is improved, and the requirement of high-altitude port rate is met. Moreover, a forwarding strategy is configured in the forwarding equipment, the transmission network layer address of the received message can be modified based on the forwarding strategy, and it is ensured that the message can be forwarded to a proper processing unit according to the task distribution condition among the plurality of baseband units. Therefore, the message processing requirement under the architecture that a plurality of baseband units are connected with a plurality of antenna radio frequency units is met.

The invention provides a lunar conduction remote satellite formation system and a cooperative work method, the system is deployed in a lunar orbit, and through cooperative work among satellites in the system, the satellite formation system is matched with a ground Ka measurement and control station to jointly provide communication, navigation and remote sensing services for lunar users. The lunar conduction remote satellite formation system comprises a master satellite and slave satellites, wherein the master satellite comprises a satellite-ground high-speed measurement and control unit, an inter-satellite link unit, a communication load, a navigation load, an ultra-stable time frequency unit and a comprehensive electronic unit; the slave satellite comprises a measurement and control unit, an inter-satellite link unit, a communication load, a navigation load, a remote sensing load and a comprehensive electronic unit. Through the arrangement of the lunar orbit, the configuration of the communication navigation remote sensing function and the cooperation of satellites in the system, comprehensive communication and remote sensing services are provided for lunar users in the lunar space where signals of an earth navigation system cannot cover and signals of a ground measurement and control system are limited to cover.

The invention relates to the technical field of project supervision informatization, and provides a supervision multi-heterogeneous system cloud edge collaborative adaptation method, which comprises the following steps: collecting heterogeneous information such as edge equipment hardware architecture and an operating system to generate records; integrating supervision monitoring data and cloud instructions, classifying the data according to functions and updating frequencies, and marking high-frequency units; unifying a data format and adding Hash verification information; the cloud constructs a three-dimensional mapping table, and edge nodes are grouped in combination with high-frequency data; converting the private protocol of the edge device into a general protocol; by taking minimization of transmission quantity and energy consumption as a target, distributing tasks by using an integer linear programming model; dynamically adjusting the equipment energy consumption; and dynamically optimizing the configuration based on the interface indexes. The cloud edge interaction efficiency can be improved, the energy consumption is reduced, and the reliable operation of supervision business is ensured.

A comprehensive detection device for a radar seeker relates to the technical field of measurement and control, a target angular displacement forming device (1) is arranged on the right side of the ground of a microwave anechoic chamber (3), the target angular displacement forming device is connected with a PXI system in a measurement and control cabinet (5) located on the outer side of the microwave anechoic chamber through a serial port bus, and a window is arranged on the wall of the left side of the microwave anechoic chamber. A mounting clamp (16) on the sliding clamping table (4) clamps the radar seeker to be tested and drives the radar seeker to be tested to enter the microwave darkroom from the window, and the radar seeker to be tested is connected with a high-frequency unit and a signal switching unit in the measurement and control cabinet through cables to test a receiving loop; the device has the advantages that the size is small, the assembly is convenient and fast, the shielding darkroom can be used for accurate measurement in an inner field, the device can be portable and used in an outer field, and the depth of the single-pulse Doppler radar seeker can be detected.

The invention relates to the technical field of underwater azimuth detection and positioning, in particular to an underwater positioning method and positioning system based on TF-GSC acoustic signal enhancement. Comprising the following steps that a plurality of underwater transducer arrays are arranged on the periphery of an area where a target object is located, and reference sound signals are periodically and actively emitted; the target object receives the emission signal, preliminary spherical positioning is carried out according to the time difference of arrival, and rough position estimation of the target object is obtained; each underwater transducer array performs STFT decomposition on an echo signal of a target object, time-frequency units are divided on a time-frequency two-dimensional plane, and a TF-GSC algorithm is executed on each time-frequency unit; the SNR of the enhanced signal is used as feedback, the array beam direction and weight are dynamically adjusted, and the receiving effect is further optimized; and carrying out global convergence judgment by utilizing a cross-iteration period. According to the method, the target extraction capability and the interference suppression effect of underwater positioning can be improved, so that the accuracy of underwater positioning is improved.

The present disclosure relates to methods and communications apparatuses. One example method include generating and sending a channel state information (CSI) report. The CSI report indicates M space-frequency units and a weighting coefficient of a part or all of the M space-frequency units, each of the M space-frequency units corresponds to one space domain vector and one frequency domain vector, and a weighted sum of the part or all of the M space-frequency units is usable for determining a precoding matrix of a plurality of frequency domain units.

The invention discloses a time sequence knowledge graph-oriented link prediction method, which comprises the following steps of: inputting graph data containing nodes and edges, then capturing local structure information in a graph structure processing module by utilizing a relational graph convolutional network, dynamically distributing weights among the nodes by integrating a self-attention mechanism, and outputting node embedding representation. Then, the time sequence dynamic processing module receives historical node embedding, introduces a historical corresponding unit and a historical frequency unit, extracts historical time information and adjusts the time influence of an event; and finally, embedding the nodes generated by the graph structure processing module into the time features extracted by the time sequence dynamic processing module for fusion, and finally outputting a link prediction result. Through the link prediction method, the accuracy of time sequence knowledge graph reasoning is remarkably improved, complex modes and trends in time sequence data can be better captured, and the link prediction method is suitable for various application scenes needing high-precision prediction.

The invention discloses a power equipment monitoring method and system based on multi-modal information collaboration, and the method comprises the steps: firstly obtaining a to-be-monitored voiceprint and to-be-analyzed vibration information corresponding to the voiceprint, obtaining a voiceprint feature and a vibration feature through time-frequency analysis, calculating the coupling coefficient of the voiceprint feature and the vibration feature in each time-frequency unit to reflect the correlation strength, and carrying out the time-frequency analysis of the voiceprint feature and the vibration feature; and finally, detecting the state of at least one piece of to-be-detected power equipment in the to-be-monitored voiceprint segment according to the atlas and voiceprint features, thereby realizing multi-modal information cooperative monitoring of the power equipment.

The present invention relates to a wireless communication system, more specifically to a method and an apparatus therefor, the method comprising switching an active bandwidth part (BWP) on the basis of BWP switching indication information, and transmitting an uplink on the basis of the results of a channel access procedure (CAP) in the switched active BWP, wherein the active BWP comprises N number of frequency units in which the CAP is carried out, N being an integer two or greater, and the uplink is transmitted in a resource determined on the basis of whether the CAP is successful in all or a part of the N number of unit frequencies.

The invention relates to a harmonic current suppression method and device, computer equipment, a medium and a program product. The method is applied to a mixed frequency parallel system comprising a low-frequency unit and a high-frequency unit, and comprises the following steps: filtering a first part of harmonic waves generated by the low-frequency unit and the high-frequency unit at a power grid side; performing pulse width modulation on the low-frequency unit, and reducing a second part of harmonic waves generated by the low-frequency unit; and performing multiple quasi-proportional resonance control on the high-frequency unit, and compensating a third part of harmonic waves generated by the low-frequency unit. Therefore, some specific sub-harmonics can be selectively eliminated, an optimal output voltage waveform is generated at a lower switching frequency, current harmonics are remarkably reduced, high efficiency and low cost are effectively considered, the advantages of a power device are played to the maximum extent, and the system performance is improved while the dynamic performance and the power density of the system are improved. The size of a passive filter element is reduced, the control bandwidth of the system is increased, the control complexity of the converter is reduced, and the output performance of the hybrid frequency parallel system is improved.

The invention relates to a level measuring device (1) for determining a level (L) of a filling material (2), which comprises the following components: - A high-frequency unit (10) for generating and transmitting radar signals (S HF ) along a beam axis (a) towards the filling material (2), and for receiving corresponding reception signals (R HF ) after reflection at the product surface, - an evaluation unit for determining the fill level (L) based on the received signal (R HF ), and - two radar lenses (11, 12) arranged one behind the other in the beam axis (a). According to the invention, the apertures of the radar lenses (11, 12) are selected such that their distance (b 11 + f 12 ) to each other the sum of the image distance (b 11 ) of the first radar lens (11), and the focal length (f 12 ) of the second radar lens (12). This allows the radar signals (S HF , R HF) through a thermally insulating housing neck (131). Furthermore, the inventive design of the apertures within the housing neck (131) allows a radar window (14) serving as explosion protection to be arranged in such a way that the beam guidance is only minimally restricted.

An audio processing system and method are provided, the audio processing system comprising: an input interface that receives an input audio mix and transforms it into a time-frequency representation defined by values of time-frequency units; a processor that maps values of the time-frequency units into a hyperbolic space by executing an embedded neural network trained to associate the respective time-frequency units to high-dimensional inserts and projecting the respective high-dimensional inserts into the hyperbolic space; and an output interface that accepts a selection of at least a portion of the hyperbolic space and renders a selected hyperbolic embedding that falls within the selected portion of the hyperbolic space.

The embodiments of the present application disclose a sidelink communication method, a terminal device and a network device. The method includes: determining, by a terminal device, a time frequency resource of a physical sidelink control channel (PSCCH) in a first time frequency unit; and receiving or transmitting, by the terminal device, the PSCCH on the time frequency resource. The method, the terminal device, and the network device in the embodiments of the present application help reducing the complexity of PSCCH detection by a terminal device at the receiving end.

The invention relates to a transmitting / receiving arrangement (11) for a temperature-resistant radar-based level measuring device (1) which is designed for the efficient transmission and reception of radar signals (S HF1,2 , R HF1,2 ) in different frequency bands. For this purpose, the transmitting / receiving arrangement (11) is based on a waveguide (111), by means of which the temperature-sensitive high-frequency units of the level measuring device (1) are spaced from the possibly hot filling material (2). In this case, the radar signals (S HF1,2 , R HF1,2 ) are transmitted or received via the end region of the waveguide (111). According to the invention, the waveguide (111) has an internal cross-section (D) through which only the radar or reception signals (S HF1 , R HF1 ) of the lowest frequency band propagate exclusively in the fundamental mode, while the radar or reception signals (S HF2 , R HF2) of the higher frequency band must propagate predominantly in a higher-order mode. In order to ensure that all frequency bands are nevertheless transmitted at the end region with a common phase center and thus efficiently, a matching element (112) is arranged there according to the invention, which matches the radar signals (S HF2 ) of the high frequency band into lower modes in the direction of radiation. This design allows the transmit / receive arrangement (11) to be compact and efficient at the same time.

The present invention provides a dual-broadband co-aperture phased array antenna, which belongs to the field of array antenna technology. The antenna array is composed of a×b low-frequency antenna units and (2a×2b)n high-frequency antenna units. By reusing the high-frequency antenna structure as a low-frequency radiation structure, a compact layout is achieved. The high-frequency antenna unit adopts a broadband antenna such as a waveguide, horn or Vivaldi composed of a metal structure to achieve broadband radiation in the high-frequency band; the low-frequency antenna unit forms a broadband magnetoelectric dipole antenna radiation structure by reusing the metal structure of the high-frequency unit. The present invention improves space utilization efficiency and achieves dual-broadband characteristics through structural reuse. At the same time, by adjusting the high-frequency antenna unit structure and the low-frequency feeding method, multiple polarization forms can be achieved, thereby enhancing the adaptability of the antenna. In addition, the compact arrangement of the radiating units reduces the unit spacing and significantly improves the wide-angle scanning performance of the array.

The invention discloses a PID parameter setting method for suppressing conflict between primary frequency modulation and secondary frequency modulation of a hydroelectric generating set, and belongs to the technical field of hydroelectric generating set adjustment. Comprising the following steps: S1, calculating an initial value of a PID (Proportion Integration Differentiation) parameter according to a water diversion system water flow inertia time constant and a hydroelectric generating set mechanical inertia time constant; s2, taking the PID parameter initial value of the speed regulator as a PID parameter value, solving the root of the characteristic equation in the S1, and calculating a unit power dynamic analytical expression during frequency unit step disturbance according to a Fisher method of a quartic equation; s3, calculating an analytic expression of the hydroelectric generating set power square error integral quantity based on the unit power dynamic analytic expression; and S4, calculating a speed regulator PID parameter formula for suppressing the conflict between the primary frequency modulation and the secondary frequency modulation of the hydroelectric generating set according to the analytic expression of the unit power square error integral quantity and the initial value of the speed regulator PID parameter. The problem that the dynamic process of primary frequency modulation and the dynamic process of secondary frequency modulation conflict is solved, and the adjusting capacity of the hydroelectric generating set can be brought into full play.

The invention provides an intelligent voice control system and a voice enhancement method in a reverberation environment. The method comprises the following steps: acquiring an initial voice signal in the reverberation environment; determining reverberation energy distribution in each frequency band according to the time-frequency spectrogram of the initial voice signal and the frequency response attenuation curve in each frequency band, and determining reverberation suppression gain of the initial voice signal in a time-frequency domain through all reverberation energy distribution; performing reverberation suppression on the initial voice signal according to the reverberation suppression gain to obtain a voice signal after reverberation suppression; performing time-frequency mask estimation on the initial voice signal to obtain a time-frequency mask of the initial voice signal, and determining residual interference energy of each time-frequency unit of the initial voice signal in a time-frequency domain according to the time-frequency mask and an interference covariance matrix of the target sound source; and performing harmonic enhancement on the voice signal after reverberation suppression through all residual interference energy to obtain a voice enhanced signal. By adopting the scheme of the invention, the acoustic crosstalk caused by reverberation can be suppressed.

The invention relates to a communication method, device and system. A terminal device sends a first message to a first network device, the first message comprising first capability information, the first capability information being used for indicating whether the terminal device supports receiving a first signal at at least one frequency unit, the terminal device comprising a low power consumption module, and the low power consumption module being used for receiving a second signal at least one frequency unit. The low power consumption module is used for receiving the first signal. In the embodiment of the invention, the terminal equipment can inform the access network equipment of the capability of the terminal equipment related to the low-power-consumption module, so that the access network equipment can send signals such as LP-WUS to the terminal equipment according to the capability, and the terminal equipment can work through the low-power-consumption module to reduce the power consumption of the terminal equipment.

The embodiment of the invention relates to the technical field of mobile communication, and discloses a mutual coupling suppression dual-frequency dual-polarized antenna, which comprises a reflecting plate, and a low-frequency unit, a high-frequency unit and a separator which are arranged on the reflecting plate, the low-frequency unit and the high-frequency unit are separated by the separator; the low-frequency unit comprises four dipoles, each dipole comprises two oscillator arms which are mutually coupled, and the width of each oscillator arm is gradually increased from the feed end to the tail end to form a polygonal structure; the oscillator arms of the four dipoles are arranged in a surrounding manner to form a rhombus; the high-frequency unit comprises multiple layers of dielectric substrates, a feed network and an antenna patch, the feed network and the antenna patch are respectively arranged on different dielectric substrates, and symmetrical slots are formed in a radiating surface of the antenna patch. In this way, the wave beams of the high-frequency unit and the low-frequency unit are reduced, and high-frequency and low-frequency mutual coupling is restrained.

The proposed solution relates to a drive system for an electric bicycle (1), comprising a bottom bracket shaft (T) for applying a rider torque at a rider cadence for generating pedaling power for muscle-powered propulsion of the electric bicycle (1), at least one drive motor (A) for providing externally powered drive power in addition to the pedaling power, a torque unit (2) for determining the rider torque, and a frequency unit (3) for determining the rider cadence. An electronic control unit (100) is configured and provided to determine the pedaling power from the rider cadence and the rider torque.

The invention relates to the technical field of wireless carrier communication, in particular to a cluster unmanned aerial vehicle mixed signal separation and identification method, which comprises the following steps of: extracting a receiving strength time sequence from a received cluster unmanned aerial vehicle mixed wireless carrier communication signal, and calculating the sum of absolute values of difference values between continuous points of the sequence under a plurality of time scales, and linear fitting is carried out to establish a mixed channel fractal dimension. According to the method, difference absolute value accumulation and calculation under a plurality of time scales are carried out on a mixed wireless carrier communication signal receiving strength sequence, a mixed channel fractal dimension is established, and the fractal dimension is utilized to realize adaptive setting of an analysis window length and a stepping amount, so that the time-frequency resolution capability of subsequent segmented Fourier transform is improved; after a mixed signal time-frequency spectrogram is generated, a complete discrete time-frequency trajectory set is constructed through multi-frequency unit peak energy detection and association along a time axis, and unmanned aerial vehicle signals with closely overlapped frequencies can be distinguished.

The invention discloses a control method for performing primary frequency modulation in a power dead zone range of a hydroelectric generating set, and belongs to the technical field of hydroelectric generating set adjustment. Comprising the following steps: S1, calculating H1 and H2 of a water diversion system according to a water flow inertia time constant and a unit mechanical inertia time constant of the water diversion system; s2, calculating a unit power dynamic analytical expression during frequency unit step disturbance; s3, calculating a first-order differential link coefficient decomposed by a second-order correction link based on the unit power dynamic analytical expression; and S4, calculating the output quantity of the PID speed regulator in the current sampling period. According to the scheme, the oscillation link transfer function parameters in the dynamic process are calculated, the second-order system correction transfer function with the given frequency value is designed on the basis, it is guaranteed that the unit power does not oscillate when the unit frequency is given to change, the problem that the power exceeds a power dead zone in the dynamic process is prevented, and the power efficiency is improved. And meanwhile, an amplitude limiting link is arranged at the frequency deviation value so as to ensure that the power steady-state value exceeds the power dead zone range.