220 results about "Frequency Unit" patented technology

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 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 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.

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.

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 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 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 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 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.

Techniques are described for configuration and / or transmission of reference signals. An example wireless communication method includes transmitting, by a first network device, a first reference signal to a second network device, where the first reference signal is transmitted on N occasions, where each of the N occasions is based on a first set of time domain resources and a first set of frequency domain resources of the first reference signal, where each of the N occasions includes X time units in time domain and Y frequency units in frequency domain, and where N, X, and Y are integers greater than or equal to 1; and receiving, by the first network device from the second network device, a measurement report in response to the transmitting the first reference signal.

A communication method and apparatus, which relate to the technical field of communications. In the method, a first communication apparatus can acquire a first precoding matrix, wherein the first precoding matrix comprises a first sub-matrix corresponding to a first spatial stream and a second sub-matrix corresponding to a second spatial stream, the vector, which corresponds to a first time-frequency unit in the first sub-matrix, being a first vector, and the vector, which corresponds to a first time-frequency unit in the second sub-matrix, being a second vector; the first communication apparatus calibrates the first precoding matrix to obtain a second precoding matrix, wherein the second precoding matrix comprises a third sub-matrix corresponding to the first spatial stream, the vector, which corresponds to a first time-frequency unit in the third sub-matrix, being a second vector; and the first communication apparatus sends first information, wherein the first information is obtained by means of compressing the second precoding matrix. The method can improve the compression efficiency of channel information (such as a precoding matrix) and improve the feedback performance of the channel information.

The present application provides a communication method and a related apparatus. The method comprises: a terminal device finds, from first configuration information, a sampling sequence and a comb offset corresponding to a first antenna port. Then, on the basis of the sampling sequence corresponding to the first antenna port and the comb offset corresponding to the first antenna port, the terminal device determines frequency domain positions of N frequency units corresponding to the first antenna port, and sends a first reference signal sequence by means of the frequency domain positions of the N frequency units corresponding to the first antenna port, N being an integer greater than or equal to 2. The N frequency units corresponding to the first antenna port are arranged at non-uniform intervals, which helps reduce interference and improve channel estimation performance. For example, when a communication system needs to support a large number of antenna ports and / or channel delay is large, if the N frequency units corresponding to the first antenna port are arranged at non-uniform intervals, interference can be eliminated by means of methods such as filtering, thereby improving channel estimation performance.

This invention discloses a hospital mobile internet message push system based on a WeChat service account, relating to the field of mobile internet technology. A data entry and collection module is responsible for entering the current patient's medical records and obtaining the patient's past medical records. An evaluation message push update frequency unit calculates and outputs the current update frequency GP. A message push priority measurement unit calculates and outputs the push priority YJ. An update frequency push adjustment unit receives the update frequency GP and push priority YJ as inputs and calculates and outputs an adjustment coefficient GT. An execution push adjustment module adjusts the message push according to the adjustment coefficient GT. A blockchain node module runs, stores, and verifies the data entered, calculated, pushed, and updated on each node of the blockchain. This invention, by combining blockchain technology, realizes real-time updates of patient health data, priority calculation of message pushes, and dynamic adjustment of blockchain message verification and update frequency.

The embodiment of the invention provides a communication method and an application device, which can be applied to the field of satellite communication, such as NTN. The method comprises: a terminal device determining a first interleaving mode of a plurality of time-frequency units, the plurality of time-frequency units corresponding to a first OCC sequence, the plurality of time-frequency units being used for bearing first data expanded by the first OCC sequence; and the terminal device sends second data on the plurality of time frequency units, wherein the second data is data interleaved by the first data in the first interleaving mode. By adopting the embodiment of the invention, the anti-interference performance of the terminal device for sending the information can be improved, the interference of other terminal information on the network side is reduced, and the system performance and the system capacity can be improved.

A terminal includes a communication unit configured to transmit and receive a multi-carrier signal in a frequency band equal to or higher than a predetermined frequency, and a control unit configured to determine a first frame structure of the multi-carrier signal, wherein in the first frame structure, at least one of a subcarrier spacing and a number of resource blocks in a maximum channel bandwidth, a CP (cyclic prefix) ratio, and a time unit or a frequency unit of scheduling is different from a second frame structure of the multi-carrier signal in a frequency band equal to or lower than the predetermined frequency.

The application discloses a variable frequency air source heat pump frost control operation method based on a frost control performance graph, and belongs to the technical field of frost control. First, a variable frequency unit frost control performance graph under a current working condition is drawn. Second, according to a heating capacity range and a frost control potential reflected by the frost control performance graph, a heating target and a frost control operation target are determined according to a building load demand at the moment. Third, a compressor frequency and an outdoor fan frequency of the variable frequency air source heat pump are determined according to the above demand and target. Finally, the compressor and the fan frequency output are controlled by a unit frost control operation controller, so that the heating and the frost control demand are realized. On the basis of meeting the heating capacity, effective frost control operation of the unit is realized.

Provided in the present application are a channel information feedback method, a channel information receiving method, and related apparatuses. The channel information feedback method provided in the present application comprises: a terminal device receiving first indication information, wherein the first indication information is used for indicating M space-frequency units for which the terminal device feeds back channel information, M being an integer greater than or equal to 1; and then, on the basis of the first indication information, the terminal device sending the channel information of the M space-frequency units, wherein the channel information of the M space-frequency units is obtained by means of measuring a first reference signal, the first reference signal is carried on N space-frequency units, and the M space-frequency units are some or all of the N space-frequency units, with N being an integer greater than or equal to 1. Therefore, a network device can conveniently perform inference on the basis of the channel information of the M space-frequency units, so as to obtain channel information of the N space-frequency units. A terminal device directly feeds back channel information of some space-frequency units, without the need to perform eigenvalue decomposition and DFT calculation on a downlink measurement channel so as to obtain a precoding matrix. Therefore, the terminal complexity is reduced.

The application discloses a protection and distortion control method and system during sound operation, and relates to the technical field of audio processing. An audio signal and a reference signal are acquired; the reference signal is preprocessed to obtain a trigger signal of a level effective value; a trigger threshold is acquired according to the trigger signal of the level effective value; the trigger threshold is adjusted to obtain a preset trigger threshold; the preset trigger threshold is dynamically adjusted according to a voltage value corresponding to a frequency of the audio signal to obtain a voltage value corresponding to the preset trigger threshold; and the audio frequency corresponding to the voltage value corresponding to the preset trigger threshold is a protected and distortion-controlled audio signal. The application realizes dynamic change of a high-frequency cutoff frequency of an audio high-frequency unit while maintaining the loudness of a sound field restoration of a sound system, and improves the protection and distortion control accuracy of the sound in a limit operation state of high power and long time.

The invention discloses an S-band radio frequency transceiving component, which comprises a receiving and transmitting frequency unit, a digital processing chip unit and a power supply module, and is characterized in that the receiving and transmitting frequency unit is connected with an external antenna array plane unit, and multiplexing and separation of radio frequency transceiving signals are realized at a front intermediate frequency mode end through a duplexer channel; the digital processing chip unit is used for realizing analysis of an instruction sent by an external upper computer to the component, transmitting the instruction to a controlled device to complete control, receiving intermediate frequency signals output by the output ends of the receiving and transmitting frequency units, and transmitting related detection information back to the upper computer; and the power supply module is used for supplying energy to the unit components. Compared with a low-frequency band, the module can provide a higher data transmission rate, and has the advantages of high circuit integration degree, small size, compact structure, high reliability and the like.

The invention provides a portable sound box with a bass multiplier device, which aims to realize bass enhancement of a small-size sound box, and designs the same-direction layout of pronunciation of a high-pitch unit and the bass multiplier device so as to meet the requirements that the sound quality of the portable sound box is more unified and powerful, and the portable sound box is more concise and attractive in appearance and more convenient to use. The portable sound box also has the waterproof function and the sound box body damping function to meet different use scenes, and the sound box hanging rope is provided with the quick connecting buckle so that the sound box can be conveniently hung on different supporting bodies to be used.

The invention discloses a hybrid echo cancellation method and system based on depth filtering and frequency band weighted loss, and the method comprises the steps: carrying out the preprocessing of a microphone signal and a reference signal through a low-complexity linear echo cancellation preprocessing module, and outputting an error signal; the three paths of input are sent to a hybrid conditional filter network (HHF-Net); complex domain time-frequency features are extracted through an encoder, and a complex time-frequency spectrum is recovered through a decoder after bottleneck layer modeling; a depth filtering module learns a complex filter coefficient for each time frequency unit, and suppresses echo through causal two-dimensional convolution; a mixed loss function training model of frequency band weighted amplitude loss and scale invariant signal-to-noise ratio (SI-SNR) loss is adopted. The problems of target voice information loss, poor output voice listening feeling and overlarge model parameter quantity in a double-talk scene are solved, an average opinion score (MOS) index is remarkably improved, and echo components are effectively inhibited while voice distortion is reduced.