55 results about "Frequency reuse" patented technology

Certain aspects of the present disclosure provide techniques for generating and processing a frequency multiplexed continuous wave (FMCW) based synchronization signal (SS). According to certain aspects, a method for wireless communication at a wireless node, comprising obtaining a synchronization signal comprising a first frequency modulated continuous waveform signal associated with a frequency that increases in time for a duration according to a first slope and a second FMCW signal that overlaps with the first FMCW signal, wherein the second FMCW signal is associated with a frequency that decreases in time for the duration according to a second slope that corresponds to a negative of the first slope; and performing frequency offset estimation based on the first and second FMCW signals.

The invention discloses a rapid three-dimensional shape measurement method for multi-scale frequency shift fringe projection. According to the method, on the basis of the method described in the basic patent CN118936361B, a frequency reuse stripe pattern is constructed through multi-scale region division, and images under different frequencies are obtained by adopting a three-step phase shift strategy. And constructing a complex signal for each sub-block image, performing frequency domain transformation, fusing main frequency amplitude images in two directions, extracting a frequency domain main peak index and an amplitude based on a position invariant theorem, realizing spatial positioning of a direct illumination main component, and further completing homonymy point matching and three-dimensional reconstruction between pixels of a camera and a projector. According to the method, only 15 patterns are needed in each direction, compared with 484 patterns in each direction in a basic scheme, the pattern compression rate reaches 96.9%, and the method is suitable for high-speed three-dimensional reconstruction tasks under complex illumination and dynamic scenes and has the advantages of being small in pattern number, high in response speed and high in positioning robustness.

The invention relates to a fringe projection high-reflection surface phase unwrapping method based on frequency reuse. The fringe projection high-reflection surface phase unwrapping method comprises the steps of collecting a multi-frequency fringe image and dividing the multi-frequency fringe image into an overexposure area and a non-overexposure area, solving a wrapped phase in the non-overexposure area by adopting a generalized phase shift method, obtaining an initial unwrapping phase based on a multi-frequency heterodyne algorithm, and performing block filtering and interpolation processing to obtain a fringe projection high-reflection surface phase unwrapping phase. A continuous unwrapped phase containing a high-reflection area is obtained, a complementary Gray code consistent with a wrapped phase period is constructed in combination with a multi-threshold constraint and is used for correcting the stripe level of an overexposure area, brightness attenuation design is further carried out on low and medium frequency stripes, frequency reuse is achieved, and the high-reflection area is obtained. Obtaining an unwrapped phase of an overexposure point in a non-high-frequency stripe and mapping the unwrapped phase to a high frequency; the method comprises the following steps of: extracting and fusing a wrapped phase by adopting one-dimensional Fourier and Hilbert transform for areas with overexposure of each frequency, and selecting and inhibiting spectrum leakage through a complete period, so that effective correction of the wrapped phase and stripe level of an overexposure point is realized, and a reliable unwrapped phase is obtained.

A system and method are disclosed for a superconducting traveling-wave parametric amplifier (TWPA) with improved control and performance. In a preferred embodiment, the amplifier comprises an integrated array of symmetric rf-SQUIDs in a transmission line structure. A device was fabricated using niobium superconducting integrated circuits, and confirmed predicted performance, with a maximum gain up to 17 dB and a bandwidth of 4 GHz. A similar device can be applied as a low-noise, low-dissipation microwave amplifier for output from a superconducting quantum computer, or as a preamplifier, switch, or frequency converter for a sensitive microwave receiver, or as an output amplifier for a frequency-multiplexed superconducting detector array.

Example embodiments of the present disclosure relate to a solution for determining a set of physical random access channel (PRACH) occasions. In the solution, a first apparatus receives, from a second apparatus, configuration information indicating a plurality of PRACH occasions comprising PRACH occasions in uplink resource and PRACH occasions in sub-band non-overlapping full-duplex (SBFD) resource; determines, based on the configuration information, and for each frequency resource index for frequency multiplexed PRACH occasions, a starting PRACH occasion of a set of PRACH occasions for a PRACH transmission with preamble repetitions from the PRACH occasions in uplink resource and the PRACH occasions in SBFD resource, and performs, to the second apparatus, the PRACH transmission based at least in part on the starting PRACH occasion of the set.

The invention discloses a wave beam scheduling method and device based on interference avoidance, equipment and a storage medium, and relates to the technical field of satellite communication, and the method comprises the steps: equally dividing a field angle of a target satellite into a plurality of angle intervals, and calculating an interference avoidance distance corresponding to each angle interval, the angle interval is symmetrically distributed based on a connecting line of the target satellite and the sub-satellite point; based on the included angle between the to-be-scheduled terminal and the connection line, determining a matching interval of the to-be-scheduled terminal in the angle interval, taking the interference avoidance distance of the matching interval as the interference avoidance distance of the corresponding to-be-scheduled terminal, and generating a beam scheduling result of each scheduling time slot; and setting starting positions of different frequency band resource blocks for different beams. Through the above mode, interference avoidance is carried out from two aspects of spatial isolation and frequency reuse, a better interference avoidance effect can be realized, common channel interference existing when a plurality of beams are scheduled in the same time slot is reduced, and the spectrum utilization rate is improved.

A terminal includes: a reception unit configured to receive a block including a synchronization signal and a broadcast channel, a control channel carrying control information, and a shared channel carrying system information by applying single beamforming; and a control unit configured to perform an initial access, based on the system information. The block and one or both of the control channel and the shared channel are frequency-multiplexed, and the control channel and the shared channel are time-multiplexed.

According to one embodiment, a wireless communication device includes a receiver, a controller and a transmitter. The receiver receives a terminal identifier of a first terminal being a target for downlink frequency multiplexing transmission from another wireless communication device, and receives information identifying, of a plurality of frequency components, a first frequency component allocated to the first terminal. The controller selects, of a plurality second terminals belonging to the wireless communication device, a second terminal having a terminal identifier same as that of the first terminal and allocates the first frequency component to the selected second terminal. The transmitter transmits a header at a band including the plurality of frequency components, the header including the terminal identifier of the selected second terminal in a first field corresponding to the first frequency component, and transmits a first frame addressed to the selected second terminal via the first frequency component.

The application discloses a beam scheduling method and device based on interference avoidance, equipment and storage medium, relates to the technical field of satellite communication, and the method comprises the following steps: equally dividing the field of view angle of a target satellite into a plurality of angle intervals, and calculating the interference avoidance distance corresponding to each angle interval; the angle intervals are symmetrically distributed based on the connecting line of the target satellite and the subsatellite point; based on the included angle between the terminal to be scheduled and the connecting line, the matching interval of the terminal to be scheduled is determined in the angle interval, and the interference avoidance distance of the matching interval is taken as the interference avoidance distance corresponding to the terminal to be scheduled, so as to generate the beam scheduling result of each scheduling time slot; and the starting positions of different frequency band resource blocks are set for different beams. Through the above mode, interference avoidance is realized from the aspects of spatial isolation and frequency multiplexing, better interference avoidance effect can be realized, the co-channel interference existing when multiple beams are scheduled in the same time slot is reduced, and the spectrum utilization is improved.

The invention belongs to the technical field of communication, and discloses a user pairing method of a communication perception calculation deep fusion NOMA technology, which comprises the following steps of: configuring a parameter N and a signal-to-interference ratio threshold difference between NOMA pairing users in a parameter configuration mode in a base station; dividing the cell into a central area and an edge area based on fractional frequency multiplexing; based on soft frequency reuse, dividing a central region where the user meeting the NOMA pairing condition is located into an inner central region and an outer central region which are equal in area from inside to outside, and respectively dividing the inner central region and the outer central region into 2N NOMA pairing regions with equal central angles; positioning a current service user by adopting a user position sensing technology; and pairing the users meeting the NOMA pairing condition in the users in the inner central area and the outer central area. According to the method, NOMA pairing in a new-generation mobile communication system is simplified by utilizing a sensing and communication fusion technology, the system performance is improved, the actual scene of network deployment is considered, and the NOMA technology is not adopted for edge users with poor channel conditions.

Example embodiments of the present disclosure relate to a solution for determining a set of physical random access channel (PRACH) occasions. In the solution, a first apparatus receives, from a second apparatus, configuration information indicating a plurality of PRACH occasions comprising PRACH occasions in uplink resource and PRACH occasions in sub-band non-overlapping full-duplex (SBFD) resource; determines, based on the configuration information, and for each frequency resource index for frequency multiplexed PRACH occasions, a starting PRACH occasion of a set of PRACH occasions for a PRACH transmission with preamble repetitions from the PRACH occasions in uplink resource and the PRACH occasions in SBFD resource, and performs, to the second apparatus, the PRACH transmission based at least in part on the starting PRACH occasion of the set.

Example embodiments of the present disclosure relate to a solution for determining a set of physical random access channel (PRACH) occasions. In the solution, a first apparatus receives, from a second apparatus, configuration information indicating a first plurality of physical random access channel (PRACH) occasions and a second plurality of PRACH occasions, determines, based on the configuration information, and for each frequency resource index for frequency multiplexed PRACH occasions, a starting PRACH occasion of a set of PRACH occasions for a PRACH transmission with preamble repetitions from the PRACH occasions in uplink resource and the PRACH occasions in SBFD resource, and performs, to the second apparatus, the PRACH transmission based at least in part on the starting PRACH occasion of the set

The present disclosure provides a signal transmission method, a network node, a communication system and a storage medium, wherein the method applied to the network node comprises: determining a forwarding beam pattern used in a duration of a PRACH transmission occasion associated with an SS / PBCH block according to an association relationship between the SS / PBCH block and the PRACH transmission occasion, and frequency multiplexing information of the PRACH transmission occasion; and performing signal forwarding processing based on the forwarding beam pattern in the duration of the PRACH transmission occasion associated with the SS / PBCH block. The present disclosure can implicitly indicate the forwarding beam pattern used by the network node in the related process of random access without the need for the network side to issue additional control information, can save control signaling, improve the utilization of network resources and spectral efficiency, and improve the reliability of the network node for signal forwarding.

The invention discloses a satellite network data transmission method and system based on beam hopping and frequency multiplexing, and relates to the technical field of satellite network high-concurrency data transmission, the method comprises the following steps: constructing a user terminal access avoidance mechanism and an asynchronous processing mechanism according to a corresponding relation between a low-orbit satellite and a user terminal; determining a user terminal accessed by the low-orbit satellite; the method comprises the following steps: grouping user terminals accessed by a low earth orbit satellite through a K-means algorithm to obtain a user group; and dividing a communication frequency band of the low-orbit satellite into a plurality of communication sub-frequency bands, and issuing data resources to the user group by the sub-frequency bands through a beam hopping method. The access efficiency is effectively improved by constructing an avoidance mechanism and an asynchronous processing mechanism, the resource allocation of the low-orbit satellite can be effectively optimized through dynamic grouping, the spectrum resource utilization rate of the low-orbit satellite is effectively improved by multiplexing a plurality of communication sub-bands, and concurrent access of multiple user terminals is supported.

This invention discloses a frequency planning method for wireless communication networks based on a genetic algorithm, relating to the field of frequency planning technology for wireless communication networks. The method includes: collecting network traffic, user distribution, base station location, antenna orientation, and historical interference data; preprocessing the collected data; integrating the preprocessed data and calculating interference values ​​to identify cell pairs with interference relationships; assessing the current network interference situation to obtain interference assessment results; using the interference assessment results as the basis for formulating a dynamic frequency reuse strategy, and adjusting the frequency reuse mode; constructing an interference prediction model using a random forest algorithm, outputting the predicted cell pairs and interference levels; adjusting frequency allocation based on the predicted cell pairs and interference levels; using the frequency allocation adjustment results as the initial population for genetic algorithm optimization, evaluating the fitness of each individual, and iteratively updating based on the fitness evaluation results.

The present application relates to a network frequency reuse method and apparatus, a computer device, a readable storage medium, and a program product. The method comprises: determining a target scenario on the basis of signal strength data of a first network and signal strength data of a second network; on the basis of a preset correspondence between scenarios and resource scheduling strategies, determining a target resource scheduling strategy corresponding to the target scenario; and on the basis of the target resource scheduling strategy, allocating resource blocks of a shared network frequency, to determine a first resource block corresponding to the first network and a second resource block corresponding to the second network.

To address the limitation of existing methods in achieving transparency within the visible spectrum, this invention provides a metasurface unit for full-space millimeter-wave frequency multiplexing holography based on a complex amplitude metasurface. This unit comprises three metal layers and two transparent substrates, arranged from top to bottom as a first metal layer, a first transparent substrate, a second metal layer, a second transparent substrate, and a third metal layer. A full-space millimeter-wave frequency multiplexing holographic device based on a complex amplitude metasurface is also provided. Furthermore, a method for full-space millimeter-wave frequency multiplexing holography based on a complex amplitude metasurface is provided. This invention's method enables efficient and reliable design of frequency multiplexing metasurface holograms.

The application discloses a spectrum sharing method, device, equipment and computer readable storage medium. The spectrum sharing method comprises the following steps: if a to-be-tested cell is a high-interference area, frequency multiplexing is performed according to a first frequency multiplexing coefficient; and if the to-be-tested cell is a low-interference area, frequency multiplexing is performed according to a second frequency multiplexing coefficient, wherein the first frequency multiplexing coefficient is greater than the second frequency multiplexing coefficient. The application avoids the occurrence of the phenomenon of co-frequency interference between cells.

The invention discloses a wireless broadband ad hoc network and a signal transmission method, and belongs to the technical field of wireless communication. A wireless broadband ad hoc network comprises a physical layer processing module, an intelligent antenna module, a network layer control module and a security encryption module. And the physical layer processing module adopts a coding orthogonal frequency division multiplexing technology and is combined with adaptive modulation and coding to suppress multipath interference. The intelligent antenna module realizes beam forming and spatial multiplexing based on multiple input multiple output. And the network layer control module realizes self-organizing multi-hop and dynamic topology reconstruction by optimizing a routing algorithm, and inhibits bandwidth attenuation in combination with a frequency reuse-space time division multiplexing technology. The security encryption module provides information source and channel dual encryption. All the modules are deeply coordinated, an integrated system with space-frequency coordination, multi-hop stable transmission and anti-interference is constructed, the transmission distance, networking flexibility and anti-interference capability are effectively improved, and the requirements of emergency communication, unmanned systems and other scenes for high bandwidth, low time delay and reliable and safe communication are met.

To provide a quantum bit control device capable of satisfactorily generating an analog signal from a frequency-multiplexed pulse signal.SOLUTION: The quantum bit control device 16 includes a generation circuit group 21 including a plurality of waveform generation circuits 14a, 14b, and 14c that generate pulse signals at frequencies assigned to the respective quantum bits 24a, 24b, and 24c, a multiplexing circuit 22 that is commonly connected to the waveform generation circuits 24a, 24b, and 24c and frequency-multiplexes the pulse signals while adjusting the phases of the pulse signals on the basis of an algorithm for reducing the crest factor, and a digital-to-analog converter 23 that generates analog signals from the frequency-multiplexed pulse signals.SELECTED DRAWING: Figure 1

The invention discloses a frequency-angular momentum multiplexing acoustical holography method based on an acoustic metasurface, and the method comprises the steps: determining the transmission amplitude phase distribution of the acoustic metasurface at each working frequency according to the frequency and orbital angular momentum order of each vortex acoustic beam and the projection position corresponding to each acoustic beam at a receiving end, and carrying out the spatial discretization and numerical discretization, according to the method, parameters of each metamaterial unit of the acoustic metasurface are determined, the acoustic metasurface with frequency selectivity and angular momentum selectivity is obtained, the acoustic metasurface achieves accurate decoupling regulation and control on amplitudes and phases of sound fields with different frequencies, and acoustic holographic projection with the frequency selectivity and the angular momentum selectivity at the same time is achieved. According to the method, the frequency multiplexing technology and the angular momentum multiplexing technology are combined, the information containing capacity of the acoustic holographic technology is greatly expanded, the flexibility of the acoustic holographic technology is enhanced, and the blank of related fields is filled.

The application discloses a method for realizing crosstalk of a space division multiplexing device based on light intensity image processing. After two-dimensional light intensity data is imported and light spots are searched and recognized, the relative positions of cores on a light beam analyzer are determined, the light spot intensity of target cores and non-target cores is calculated, and finally, the background noise and the device crosstalk are obtained. The application can quickly and accurately calculate the device crosstalk, so that the device function can be verified as soon as possible, and is suitable for basically all space division devices supporting frequency multiplexing and mode multiplexing.

An inductor structure includes a first quadrupole inductor and a second quadrupole inductor, wherein the second quadrupole inductor overlaps the first quadrupole inductor. In certain aspects, the inductor structure may be included in a filter, which may also include one or more capacitors coupled to the inductor structure.

Wireless communication methods, systems, and apparatus for reducing interference caused by power leakage are described. A first user equipment (UE) or base station may select communication resources for sidelink communication based on the distance between UEs that have reserved frequency resources in the same time window. The first UE or base station may determine a distance parameter between the first UE and one or more other UEs (e.g., including a second UE) that have reserved frequency resources in the time window. The distance parameter may represent the physical distance between the first UE and the second UE or, for example, the power received by a reference signal of the second UE as received by the first UE. The first UE or base station may select communication resources based on whether the distance parameter is below a threshold, and the first UE may use the selected resources to transmit sidelink communication.

At a user equipment: obtaining, from a network access node, a low power synchronisation signal corresponding to a first beam and one or more beam tracking signals corresponding to one or more other beams, wherein the low power synchronisation signal is frequency multiplexed within the one or more beam tracking signa ls; estimating, based on the obtained low power synchronisation signal and the one or more beam tracking signal, respective receive powers and / or receive qualities associated with the first beam and the one or more other beams; and selecting a beam from the first beam and the one or more other beams based on the estimated respective receive powers and / or receive qualities. At a network access node: providing, to a user equipment, a low power synchronisation signal corresponding to a first beam and one or more beam tracking signals corresponding to one or more other beams, wherein the low power synchronization signal is frequency multiplexed with the one or more beam tracking signals.

One aspect of the present invention is a signal detection device including a mode demultiplexer configured to convert N (N is a natural number) spatial mode signals including a plurality of higher modes excited in a transmission path fiber into N base modes and output the N basis modes, a frequency conversion unit configured to convert N optical signals into frequencies different from each other, a multiplexing unit configured to multiplex the N optical signals having frequencies that have been converted, and a reception unit configured to photoelectrically convert a multiplexed optical signal while maintaining modulation information for a phase and polarization, perform digital signal conversion and signal processing, and demodulate an original information sequence.

The application discloses a reusable rocket LRU repair level dynamic decision method and system, relates to the technical field of spaceflight equipment maintenance management, and comprises the following steps: collecting full life cycle data of the LRU; constructing an association library after preprocessing, matching a loss mode, a maintenance candidate scheme and a key constraint threshold according to the cumulative launch number N; quantitatively scoring the maintenance candidate scheme based on a four-dimensional index system to obtain a four-dimensional quantitative score; dynamically allocating a weight according to N and combining a forced constraint judgment to perform weighted calculation on the four-dimensional quantitative score calculation and select an optimal maintenance scheme. The prior art mainly depends on the LORA method of a traditional spacecraft and an aircraft maintenance level decision method. When these methods are applied to the reusable rocket, due to the fact that the model itself lacks a sensing and response mechanism for the key state variable "cumulative launch number", the decision accuracy is insufficient, and the maintenance scheme optimization demand in a high-frequency reuse scene cannot be met.

A satellite configured to operate radiofrequency communications from one or more antenna systems. The satellite further comprises a device dedicated to locating RF equipments comprising: a reception antenna comprising a plurality N of radiating elements configured to receive an RF signal, analogue means for frequency multiplexing the signals received on the N radiating elements, means for transmitting the multiplexed signals to a satellite station on the ground. A complete satellite system further comprising a satellite station and computation means configured to receive the multiplexed signals, demultiplex them and implement goniometry processing operations to determine the position of the RF equipment to be located, and to the associated locating method.