32 results about "Frequency Unit" patented technology

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.

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 invention relates to an FMCW-based level measuring device (1) that can operate in two clearly distinct frequency bands: For this purpose, the level measuring device (1) comprises two high-frequency units (11, 12) each with a frequency-controllable oscillator (111, 112) in order to transmit radar signals (S) in the frequency bands according to the FMCW principle. HF1,2 ) to generate or, after reflection from the surface of the contents, to receive. An antenna arrangement (13) serves to transmit and receive the radar signals (S HF1, 2) towards the filling material (L) and for reception after reflection at the filling material surface, wherein a control / evaluation unit (14) is used based on the received signal (R) HF1,2The level measuring device (1) can determine the fill level (L) using the first or second frequency band. According to the invention, the level measuring device (1) is characterized by a common clock unit (15). This unit serves to form a phase-locked loop with both the first oscillator (111) and the second oscillator (121) in order to generate the corresponding radar signals (S) according to the FMCW principle. HF1,2 , R HF1,2 ) of both frequency bands. This eliminates the need for a complete phase-locked loop for each frequency band. As a result, the number of required components is reduced.

This invention discloses a simulation method and system for the operation of a variable frequency drive unit in a refrigerated container. The method includes constructing a simplified simulation model and setting initial system parameters; periodically calculating the real-time values ​​of evaporation and condensation pressures based on refrigerant flow balance using the simplified simulation model; determining the target evaporation pressure based on the operating mode and the container temperature, and dynamically adjusting the opening value of the electronic expansion valve using a proportional-integral (PI) control algorithm based on the real-time evaporation pressure to bring the evaporation pressure close to the target evaporation pressure; calculating the periodic change in the container temperature based on the compressor speed, evaporator fan speed, and container temperature control deviation, and obtaining the return air temperature and supply air temperature based on the container temperature; and finally displaying the results through a human-machine interface. This invention effectively overcomes the problems of high maintenance and testing costs, unintuitive teaching simulations, lack of process control logic, and difficulties in simulating advanced functions in existing technologies.

The application discloses a satellite navigation signal time delay stability control method and system, and the system comprises a reference time-frequency unit, a navigation signal generation unit, a navigation signal broadcasting system, a load management unit, a switch matrix, a navigation signal receiving unit and a constant temperature control unit; by establishing high-stable-state navigation signal receiving capability in the satellite load, real-time measurement of the time delay of the navigation signal is realized, and closed-loop time delay adjustment is formed with the navigation signal generation, so that the control of the navigation signal time delay stability is achieved.

The application discloses a kind of microcavity optical frequency comb ultra-high repetition frequency precision measurement system and method, solve the existing microcavity optical frequency comb repetition frequency measurement system because of facing electronic device frequency bandwidth bottleneck lead to the problem that measurable range is seriously limited, including optical rough measurement unit, comb tooth processing unit, modulation frequency shift unit, reference equalization unit, beam combination beat frequency unit and microwave precision measurement unit;Optical rough measurement unit is used to measure the repetition frequency of the light beam to be measured, and is divided into measurement beam and reference beam;Comb tooth processing unit is used to filter out target comb from measurement beam;Modulation frequency shift unit is used for electro-optic modulation to target comb;Reference equalization unit is used to control the reference comb power of reference beam to obtain better beat frequency detection effect;Beam combination beat frequency unit is used for optical beam combination beat frequency between target comb and reference comb and is divided into two beams;Microwave precision measurement unit is used to detect the beat frequency signal between target comb and reference comb, to realize the precision measurement of repetition frequency.

This network node may comprise: a communication circuit; a memory for storing instructions; and at least one processor including processing circuitry. The instructions, when executed individually or collectively by the at least one processor, may cause the network node to: acquire information on channel quality for each frequency unit allocated to a target terminal; transmit, to network nodes, information indicating a low-quality frequency unit; receive, from the network nodes through the communication circuit, information on terminals using the low-quality frequency unit; identify an interfering terminal from among the terminals on the basis of the information on the terminals; and transmit, to another network node connected to the interfering terminal, a request message for reducing transmission power of the interfering terminal.

Disclosed are a method and device for wide bandwidth physical layer protocol data unit (PPDU) transmission or reception in a wireless LAN system. A method performed in a wireless LAN system by a first STA according to an embodiment disclosed herein may comprise the steps of: generating a first type or second type PPDU on the basis of a multi-access type in each of a first frequency unit and a second frequency unit; and transmitting the PPDU to one or more second STAs on a bandwidth including the first frequency unit and the second frequency unit.

Certain aspects of the present disclosure provide techniques related to cross link interference (CLI) resource capability. An example method, performed at a user equipment (UE), includes outputting, for transmission, signaling indicating a quantity of resources the UE is capable of supporting, per a time unit or per a frequency unit, for measurement of at least cross link interference (CLI), obtaining a configuration in accordance with the indicated quantity of resources, measuring the CLI in accordance with the configuration, and outputting, for transmission, a CLI report based on the measuring.

The embodiments of the present invention relate to the field of communications. Provided are a baseband chip, a transmitter, and a terminal device. The baseband chip comprises: a low-order filter, which is used for performing filtering processing on a target signal, so as to obtain a transmission signal, and sending the transmission signal to a radio-frequency unit, wherein the low-order filter is determined on the basis of suppression level requirements for out-of-band spurs of a target channel, and the target channel is a communication channel used for transmitting the transmission signal; and a pre-compensator, which is used for performing, on the basis of a pre-compensation parameter, pre-compensation processing on a baseband signal to obtain the target signal, so as to compensate for in-band distortion caused by the low-order filter performing filtering processing on the target signal, wherein the pre-compensation parameter is determined on the basis of parameters of the low-order filter.

This utility model discloses a D8LED picture frame active speaker system, including a D8-1 active speaker system, a D8-2 active subwoofer system, and an audio intelligent processor. The audio intelligent processor incorporates an optimized DSP audio processing circuit and microprocessor technology. The wooden cabinet of the D8-1 active speaker system has a clay-sculpted picture frame installed on its exterior. An illustration lightbox is installed on the left side of the interior of the clay-sculpted picture frame, and an LED lightbox module is installed on the illustration lightbox. The LED lightbox module uses LED strips and reflectors for uniform lighting. The D8-1 active speaker system is tilted and installed to the left of the D8-2 active subwoofer system. The D8-1 active speaker system has a full-range unit, a high-frequency unit, and an aluminum core diaphragm installed on its exterior. The D8-2 active subwoofer system has a mid-bass unit and an aluminum core diaphragm installed on its exterior. This is a comprehensive application platform for mobile background music and lightbox advertising processing. The product has built-in various common audio playback devices and audio line input / output ports, as well as a pull-out function for changing the content of the advertising images.

This application discloses a mode decision method, configuration method, apparatus, terminal, network-side device, readable storage medium, and computer program product, belonging to the field of communication technology. The mode decision method of this application includes: when the low-power receiving module and the main communication module of the terminal are operating in different frequency units, the terminal performs an entry or exit decision of a target mode based on compensation information between the first frequency unit and the second frequency unit; wherein, the target mode includes at least one of the following: LP-WUS monitoring, RRM measurement offloading, and RRM measurement relaxation; the first frequency unit is the frequency unit in which the low-power receiving module operates, the second frequency unit is the frequency unit in which the main communication module operates, and the frequency unit includes a frequency band or frequency point.

This invention relates to a high-temperature resistant radar-based fill level measurement device (1) with a transmitting / receiving component (11) for efficiently transmitting and receiving radar signals (S) in different frequency bands. HF1,2 R HF1,2 For this purpose, the transmitting / receiving component (11) is based on a waveguide (111), by means of which the temperature-sensitive high-frequency unit of the horizontal measuring device (1) is spaced apart from the potentially hot contents (2). Radar signal (S HF1,2 R HF1,2 The signal is transmitted and received via the end region of the waveguide (111). According to the invention, the waveguide (111) has an inner cross-section (D) through which only the lowest frequency radar or received signal (S) is transmitted. HF1 R HF1 ) is specifically propagated in the fundamental mode, while higher frequency band radar or received signals (S HF2 R HF2 The signal must propagate predominantly in a higher-order mode. To ensure that all frequency bands remain at a common phase center in the end region and are thus transmitted efficiently, according to the invention, an adjustment element (112) is arranged there, which directs the transmission of the radar signal (S) in the higher frequency band of the transmission direction. HF2 The mode is converted to a lower order mode. As a result of this design, the transmit / receive component (11) can be designed compactly and efficiently.

The utility model provides a kind of polarization adaptive channel receiving system miniaturization integrated device, belong to channel receiving device technical field, including multiple modules integrated in a cabinet, including phase shift synthesis network, multiple frequency converters, tracking receiver, local oscillator module, test upconverter and time-frequency unit;High-frequency line between modules uses shielded cable, and low-frequency line between modules uses twisted pair wire.The utility model has the advantages of improving system performance and reducing system volume and integrated cost.

The application discloses a container variable-frequency refrigeration unit with a high-efficiency regenerator, which comprises a variable-frequency refrigeration unit, a shell fixedly arranged above the variable-frequency refrigeration unit, a liquid pipe arranged in the shell, a gas pipe and a return pipe respectively and communicatively arranged on the two sides of the shell, and a part of the pipe section of the gas pipe extending into the inner cavity of the shell. A cavity self-adaptive adjusting assembly is arranged in the shell and is used for self-adaptively adjusting the heat exchange space in the shell according to the medium flow. Through the above components and the cavity self-adaptive adjusting assembly, the heat exchange space can be automatically adjusted according to the refrigerant flow, the variable-frequency unit variable-flow working condition is adapted, and the regenerator can always keep a high-efficiency heat exchange state.

The application discloses a transparent dual-frequency reflective array antenna and a phase compensation method thereof, and belongs to the technical field of wireless communication.The antenna comprises a transparent medium, dual-frequency reflective array antenna units arranged on the transparent medium in an array, and a floor made of a transparent metal wire screen resistance film and laid on the bottom surface of the transparent medium.The dual-frequency reflective array antenna units are arranged in an interlaced manner by low-frequency and high-frequency reflective array antenna units, the low-frequency units are located in the center, adopt a first cross-dipole structure formed by fine metal wires, and can be extended into a Jerusalem cross structure; the high-frequency units are distributed around the low-frequency units, are composed of an outer ring, an inner ring and a second cross-dipole, and the phase is adjusted by changing the size of the inner ring and the second cross-dipole; and low-frequency and high-frequency feed sources are arranged above the array surface.The application realizes the transparentization of the dual-frequency reflective array, widens the phase compensation range by using a two-degree-of-freedom design, has the communication performance, optical transparency and multi-frequency band compatibility, and meets the multi-frequency band and transparent communication requirements of a smart city.

The application provides a communication method, device and system. In the method, at least two transmission resources are determined, the at least two transmission resources include a first transmission resource and a second transmission resource, the first transmission resource includes M first time-frequency units, the second transmission resource includes N second time-frequency units, and the number of time-frequency resources carrying reference signals in the first time-frequency units is greater than the number of time-frequency resources carrying reference signals in the second time-frequency units; and based on the at least two transmission resources, reference signals are transmitted or received. In this way, not only the transmission cost can be reduced, but also the channel estimation accuracy is improved, and the system throughput is improved.

The application discloses an electromagnetic spectrum anomaly signal detection method and system, and relates to the technical field of electromagnetic spectrum detection. The method performs continuous spectrum scanning on a target frequency band and carries out time sequence alignment to construct a spectrum data set. A sliding window is set, and statistical analysis is performed on the spectrum data to establish a noise floor benchmark representing background noise level. The overall spectrum energy change in the window is combined to compensate for receiver gain drift, and a net spectrum representation relative to the noise floor is formed. On this basis, the time-frequency units continuously enhanced in the spectrum are connected and aggregated to generate candidate events. Multidimensional features are extracted from the event level, the decision threshold is adaptively adjusted according to the spectrum occupation state, and the candidate events are comprehensively judged, so that stable detection and reliable identification of abnormal signals in a complex electromagnetic environment are realized.

The present application relates to the technical field of recording noise reduction, and particularly relates to a recording noise reduction method and system based on artificial intelligence, which comprises: performing short-time Fourier transform on a to-be-processed recording signal to obtain observation time-frequency coefficients arranged according to frequency units and time units, and constructing a current input time-frequency window and a noise suppression sample vector; inputting the current input time-frequency window into an encoding network to extract a first time-frequency context embedding representation, outputting noise suppression filtering parameters through a noise suppression decoding network, and linearly filtering the noise suppression sample vector to obtain a noise suppression result; then constructing a decoding input time-frequency window and a reverberation suppression sample vector with a preset delay based on a time-frequency signal used for reverberation suppression calculation, outputting reverberation suppression filtering parameters through a reverberation suppression decoding network, linearly predicting the reverberation suppression sample vector to obtain a late reflection estimate, and deducting the late reflection estimate from the noise suppression result to obtain enhanced time-frequency coefficients; and performing inverse short-time Fourier transform on the enhanced time-frequency coefficients to obtain a noise-reduced recording signal. The present application can improve the intelligibility, intelligibility and perceptual quality of the recording signal.

The invention relates to a radar-based level measuring device for determining the level (L) of a fill material (2) in a container (3), which is easy to manufacture and comprises the following components: - An antenna arrangement (11) via which a radar signal (S) is transmitted in a defined frequency band HF ) can emit a signal to the contents (1) and, after its reflection at the surface of the contents, a corresponding receiving signal (R) can be generated. HF ) is receivable, - A high-frequency unit (12) designed to transmit the radar signal (S HF ) to generate and based on the received signal (R HF ) to determine the fill level (L), and - A waveguide arrangement (13) designed for the frequency band, which is arranged between the high-frequency unit (12) and the antenna unit (11) to transmit the radar and receive signals (S HF , R HF ) to transfer in between. According to the invention, the level measuring device (1) is characterized in that the waveguide assembly (13) is manufactured by means of metal powder injection molding. This ensures high dimensional accuracy even with geometrically delicate designs, without requiring any post-processing of the waveguide assembly (13).

A communication method and apparatus are disclosed, relating to the field of communication technology. In this method, a first communication device acquires a first precoding matrix, wherein the first precoding matrix includes a first sub-matrix corresponding to a first spatial stream and a second sub-matrix corresponding to a second spatial stream, wherein the vector corresponding to the first time-frequency unit in the first sub-matrix is ​​a first vector, and the vector corresponding to the first time-frequency unit in the second sub-matrix is ​​a second vector; the first communication device calibrates the first precoding matrix to obtain a second precoding matrix, wherein the second precoding matrix includes a third sub-matrix corresponding to the first spatial stream, wherein the vector corresponding to the first time-frequency unit in the third sub-matrix is ​​a second vector; the first communication device transmits first information, wherein the first information is obtained by compression based on the second precoding matrix. This method can improve the compression efficiency of channel information (such as the precoding matrix) and improve the feedback performance of channel information.

This invention provides an antenna device comprising a resonant shell, a substrate, a high-frequency unit, and a low-frequency unit. The substrate is disposed on the resonant shell. The high-frequency unit is disposed on the substrate and has a high-frequency excitation slot and a high-frequency matching slot. The low-frequency unit includes a first low-frequency body, a second low-frequency body, and a third low-frequency body. The first, second, and third low-frequency bodies are located on one side of the high-frequency unit. The second low-frequency body is connected to the high-frequency unit and adjacent to the high-frequency matching slot. The high-frequency unit, the first low-frequency body, and the second low-frequency body together surround the third low-frequency body. A low-frequency matching slot is located on the side of the second low-frequency body away from the third low-frequency body. The solution provided by this invention can improve the communication stability of the antenna device, thereby improving the communication quality of the antenna device.

A device may receive, from a base station, a channel state information (CSI) reference signal on at least one of a first set of frequency units or a first set of antenna ports. The first set of frequency units or the first set of antenna ports may include less than all available frequency units or less than all available antenna ports. The device may generate a CSI based on the CSI reference signal and transmit information associated with the CSI on a second set of frequency units or a second set of antenna ports for use in reconstructing the CSI on a third set of frequency units or a third set of antenna ports. The second set of frequency units or the second set of antenna ports may include less than all available frequency units or less than all available antenna ports.

This application provides a channel information feedback method, a channel information reception method, and related apparatus. The method includes: a terminal device measuring a first reference signal to obtain channel information for N space-frequency units, where the first reference signal carries the N space-frequency units, and N is an integer greater than or equal to 1. Then, the terminal device sends first indication information and channel information for M space-frequency units. The first indication information indicates the M space-frequency units, where the M space-frequency units are some or all of the N space-frequency units, and M is an integer greater than or equal to 1. A network device infers the channel information for the N space-frequency units based on the channel information of these partial space-frequency units. The terminal device does not need to perform eigenvalue decomposition and DFT calculation on the precoding matrix; instead, it directly feeds back the channel information of a partial space-frequency unit, thereby reducing terminal complexity.

The present application provides a kind of communication method, device, equipment and storage medium.The method comprises: first device determines first frequency unit, and first device carries out communication with second device on the first frequency unit.Wherein, the granularity of the first channel grid corresponding to the first frequency unit is less than or equal to the granularity of the second channel grid corresponding to the second frequency unit, the second frequency unit is used for the communication of first device and third device, and the first frequency unit and the second frequency unit are located in the same operating band.In one aspect, the present application provides a solution for the determination of frequency unit, so that the first device and the second device can realize communication through the first frequency unit;On the other hand, when determining the frequency unit, the granularity of the channel grid is considered, and the granularity of the first channel grid corresponding to the first frequency unit is set smaller, so as to improve the flexibility of the deployment of the first frequency unit.

This application provides a channel information feedback method, a channel information receiving method, and related apparatus. The method includes: a terminal device receiving first indication information, which instructs the terminal device to feed back M space-frequency units (SQUs) of channel information, where M is an integer greater than or equal to 1; then, the terminal device transmits the channel information of the M SQUs according to the first indication information. The channel information of the M SQUs is obtained by measuring a first reference signal, which is carried by N SQUs. The M SQUs are some or all of the N SQUs, where N is an integer greater than or equal to 1. This facilitates network devices inferring the channel information of the N SQUs based on the channel information of the M SQUs. The terminal device does not need to perform eigenvalue decomposition and DFT calculation on the downlink measurement channel to obtain a precoding matrix, but directly feeds back the channel information of a portion of the SQUs, thereby reducing terminal complexity.

This invention discloses a method and system for detecting abnormal signals in the electromagnetic spectrum, relating to the field of electromagnetic spectrum detection technology. The method constructs a spectrum dataset by performing continuous spectrum scanning and timing alignment on the target frequency band; it sets a sliding window and performs statistical analysis on the spectrum data to establish a noise floor benchmark characterizing the background noise level, and compensates for receiver gain drift by incorporating overall spectral energy changes within the window, forming a net boost spectrum representation relative to the noise floor; based on this, it connects and aggregates continuously enhancing time-frequency units in the spectrum to generate candidate events, extracts multi-dimensional features from the event level, and adaptively adjusts the decision threshold based on the spectrum occupancy status to comprehensively judge the candidate events, thereby achieving stable detection and reliable identification of abnormal signals in complex electromagnetic environments.

A dual-mode drive-free USB RFID card dispenser solves the problem that the existing RFID card dispenser does not have the function of simultaneously reading and writing high-frequency cards and ultra-high-frequency tags, comprising a power supply unit, a main control unit, an ultra-high-frequency unit, a high-frequency unit and an antenna unit; the power supply unit uses a USB power supply as the power input; the main control unit provides a USB interface for realizing USB drive-free communication and USB keyboard function; the ultra-high-frequency unit and the high-frequency unit are connected and controlled internally; the antenna unit comprises a separate high-frequency unit antenna and an ultra-high-frequency unit antenna; the ultra-high-frequency unit antenna is arranged in the inner circle of the high-frequency unit antenna. The USB can be powered, the product power consumption is reduced, the USB drive-free problem is solved, the USB communication and keyboard input switching problem is solved; the ultra-high-frequency unit antenna is arranged in the inner circle of the high-frequency unit antenna, forming a high-frequency and ultra-high-frequency integrated antenna, improving the ultra-high-frequency performance, enabling the ability to read and write special tags and small tags; and simultaneously having the functions of high-frequency and ultra-high-frequency.