85 results about "Frequency reuse" patented technology

The invention provides a low-orbit satellite resource allocation method and device based on beam and frequency domain collaborative optimization, and the method comprises the steps: dividing the overall bandwidth of a user region into a central sub-band and an edge sub-band through employing a dynamic soft frequency reuse scheme; all ground users are subjected to spatial clustering according to geographic positions and traffic demands, coverage cells are dynamically divided according to clustering results, and balanced service is achieved; on the basis of dynamic cell division, user clusters with high service volume are selected according to priorities, a beam activation set is generated, and a hopping beam matrix is updated; establishing a channel model between a user and a beam and a switching matrix between satellites; constructing a system utility target, and constructing a multi-target optimization problem model by taking the system utility target as a main part and integrating interference, switching overhead and delay penalty; and the multi-dimensional resource collaborative optimization framework based on deep reinforcement learning reconstructs a multi-objective optimization problem model, and outputs a solution of the multi-objective optimization problem model, including an optimal bandwidth and a power allocation result. According to the invention, resource allocation can be carried out on low-orbit satellites.

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.

According to an example aspect of the present invention, there is provided an apparatus configured to process, while in idle mode, information received from a network, the information indicating which slots from a sequence of subband non-overlapping full duplex, SBFD, slots contain at least one random access channel, RACH, occasion, a frequency start value of the at least one RACH occasion and an extent of frequency multiplexing of the at least one RACH occasion, determine, based at least in part on the information received from the network, a set of RACH occasions for initiating a random access procedure, wherein the set of RACH occasions are in SBFD uplink subband, and initiate the random access procedure using at least one RACH occasion from among the set of RACH occasions.

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.

The invention discloses a wireless communication network frequency planning method based on a genetic algorithm, and relates to the technical field of wireless communication network frequency planning, and the method comprises the steps: collecting network flow, user distribution, base station position, antenna direction and historical interference data, and carrying out the preprocessing of the collected data; integrating the preprocessed data, calculating an interference value, identifying a cell pair with an interference relationship, and evaluating the interference condition in the current network to obtain an interference evaluation result; formulating a dynamic frequency reuse strategy and adjusting a frequency reuse mode based on the interference assessment result as a basis for formulating the dynamic frequency reuse strategy; constructing an interference prediction model by adopting a random forest algorithm, and outputting predicted interference cell pairs and interference degrees; adjusting frequency allocation according to the predicted interfering cell pair and the interference degree; and taking a frequency allocation adjustment result as an initial population optimized by the genetic algorithm, performing fitness evaluation on each individual, and performing iterative updating according to a fitness evaluation result.

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 spatio-temporal frequency multiplexing (STFM) scheme for radio frequency (RF) scanning is disclosed, in which complementary sequence pairs (or "Golay pairs") are transmitted at different times using multiple frequencies. Transmission and reception of the sequences can occur on multiple transmit (Tx) and / or receive (Rx) radio sectors to scan the distance, azimuth, elevation, and (optionally) velocity of an object in an entire area.

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.

According to an example aspect of the present invention, there is provided an apparatus configured to process, in idle mode, information received from a network indicating which slots from a sequence of SBFD slots contain at least one RACH occasion, RO, a frequency start value of the at least one RACH occasion and an extent of frequency multiplexing of the at least one RO by one of: 1) indicating a number of multiplexed ROs in SBFD slots, or 2) a bitmap indicating which ROs of an uplink slot are also valid in SBDF slots, and determine, based at least in part on the information received from the network, a set of ROs for initiating a random access procedure, wherein the set of ROs are in SBFD uplink subband, and initiate the random access procedure using at least one valid RO from among the set of RO.

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.

In some embodiments, an all-optical Coherent Ising Machine (CIM) may be provided. The all optical CIM may include a fiber optics component configured to enable a frequency domain multiplexing by providing a transmission medium for a plurality of comb lines of a frequency comb mapped into a spin vector; a free space optics component configured to enable a spatial domain multiplexing by spatially separating the plurality of comb lines of the frequency comb; and a spatial light modulator configured to encode a spin-spin interaction matrix and allowing for a vector matrix multiplication, in an optical domain, of the spatially separated plurality of comb lines mapped to the spin vector and the spin-spin interaction matrix, wherein the result of the vector matrix multiplication provides a linear feedback to solve an Ising problem.

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.

The invention relates to a frequency resource multiplexing allocation method and device, equipment and a medium. The method comprises the following steps: acquiring network structure data of wireless communication in a target area; determining a frequency reuse mode of the target area based on the network structure data; acquiring allocable wireless communication frequency resources of the target area and an allocation target for allocating the allocable wireless communication frequency resources; determining an initial allocation scheme for performing frequency multiplexing allocation on each communication device in the target area according to the frequency multiplexing mode, the allocable wireless communication frequency resources and the allocation target; generating a corresponding co-frequency interference suppression scheme based on the initial allocation scheme; and performing frequency resource multiplexing allocation on each communication device in the target area according to the initial allocation scheme and the same frequency interference suppression scheme. By adopting the method, the accuracy of frequency resource multiplexing distribution can be improved.

Spectrum management for coexistence of heterogeneous wireless technologies can be provided. A first radio frequency (RF) event metric can be received from a first service endpoint. The first RF event metric can include a time when the first event occurred. A second RF event metric can be received from a second service endpoint. The second RF event metric can include a time when the second event occurred. It can then be determined that the time when the first event occurred and the time when the second event occurred are substantially consistent. Next, in response to determining that the time when the first event occurred is substantially consistent with the time when the second event occurred, the first service endpoint and the second service endpoint can be grouped in a first RF group, thereby allowing frequency reuse across similar RF groups. Different channels can then be assigned to the first service endpoint and the second service endpoint.

A method for differentiating multiple Physical Downlink Shared Channel (PDSCH) transmission schemes for transmission of data for an over-the-top (OTT) service. In a non-limiting example, the PDSCH transmission schemes include a spatial multiplexing transmission scheme, a frequency multiplexing transmission scheme, a slot-based time multiplexing transmission scheme, and a mini-slot-based time multiplexing transmission scheme. In examples discussed herein, a User Equipment (UE) can be configured to differentiate the PDSCH transmission schemes based on information indicated in Downlink Control Information (DCI) for scheduling a PDSCH transmission, information signaled to the UE via a higher layer configuration, and / or capability signaling indicated from the UE to a network. By differentiating the PDSCH transmission schemes, the UE can efficiently receive a data transmission(s) from multiple Transmission / Reception Points (TRPs) to obtain user data from the OTT service.

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.

Disclosed are techniques for wireless communication. In an aspect, a user equipment (UE) receives, from a serving cell operating on a first frequency, an inter-frequency communication gap configuration specifying at least one period of time during which the UE is permitted to tune from the first frequency to a second frequency to perform a positioning operation, wherein one or more neighboring cells of the serving cell are operating on the second frequency, tunes from the first frequency to the second frequency at a start of the at least one period of time, and performs, during the at least one period of time, the positioning operation on the second frequency.

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.

Various aspects of the present disclosure relate to a random access procedure. In an aspect, a first device receives multiple transmissions from multiple second devices in a random access procedure, and the multiple transmissions from multiple second devices are frequency multiplexed. The first device then transmits a result of the random access procedure to at least one second device.

One embodiment is directed to a system to provide wireless service comprising a base band unit and a plurality of antennas communicatively coupled to the base band unit. The system is configured for frequency reuse implemented via the plurality of antennas in order to transmit to subsets of the UEs. The UEs included in each subset are transmitted respectively different data using the same resource elements. The system is configured to collect base station data including Channel Quality Information (CQI) data, Sounding Reference Signal (SRS) data, and hybrid automatic repeat request (HARQ) acknowledgement / negative acknowledgement (ACK / NACK) data for the plurality of UEs. The system is configured to use the base station data to determine candidate UEs for transmission to using frequency reuse and to determine modulation and coding schemes (MCSs) for the UEs transmitted to using frequency reuse.

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.