30 results about "Frequency reuse" patented technology

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.

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 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.

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.

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.

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.

The invention discloses a frequency multiplexing spectrum analysis chip based on a modulator array. The frequency multiplexing spectrum analysis chip comprises an input end main waveguide, a filter array, an intensity modulator array, a total beam combiner and an optical detector. According to the scheme, a low-correlation transmission matrix is constructed through a filter array, transmission spectrums of all channels are different, and a broadband is covered. Periodic intensity modulation is applied to the light passing through the filter at different frequencies, and the modulated light intensity is combined. The intensity of each frequency channel can be obtained by carrying out demodulation processes such as Fourier transform on the collected time sequence optical signals, spectrum reconstruction is carried out by utilizing an intensity sequence and a corresponding measurement matrix, and spectrum information of an incident end can be restored.

Techniques are provided for training kernels for use in frequency-multiplexed readout of quantum bits. For example, a method comprises performing multiple iterations of a process which comprises setting states of a group of quantum bits using a random process, and performing a readout process to acquire a frequency-multiplexed readout signal which represents readout states of the group of quantum bits. The frequency-multiplexed readout signals that are acquired for at least a portion of the iterations are analyzed to build at least one kernel for each quantum bit of the group of quantum bits, wherein the at least one kernel for a given quantum bit is configured for use in discriminating a state of the given quantum bit in a frequency-multiplexed readout operation applied to the group of quantum bits.

Systems and methods for partial frequency time resource reuse coordination. One example method includes transmitting, via a transceiver, a first network message including a transmit power level for the wireless base station and an identifier for the wireless base station. The method includes receiving, via the transceiver, a second network message from an end node, the second network message including the identifier and a radiofrequency signal characteristic for the end node. The method includes selecting, with an electronic processor, an interference coordination zone for the end node based on the radiofrequency characteristic for the end node. The method includes selecting, with the electronic processor, a frequency time resource for the end node based on the interference coordination zone. The method includes transmitting, via the transceiver, a third network message to the end node, the third network message including the frequency time resource.

The invention provides a same-frequency interference suppression method of an irregular frequency multiplexing technology, which is applied to a multi-beam satellite communication system adopting a digital beam forming technology. A satellite firstly receives an access request containing a user position, and pre-allocates an initial frequency band according to the position; when the user number exceeds a threshold value, the grouping number is determined according to the available frequency resource block number, the user position and the grouping number are used as input, and a clustering algorithm is adopted to dynamically group by taking the position distance as similarity measurement; iteratively optimizing a group center and groups through a group center optimization algorithm, and calculating an inter-group balance coefficient; and if the coefficient reaches a preset threshold value, allocating different frequency resource blocks to each group, and if the coefficient does not reach the preset threshold value, continuing iterative optimization. Therefore, the resource utilization rate of the system is improved through user grouping and dynamic management of bandwidth resources of the system, the same-frequency interference of the system is effectively inhibited, and the maximum successful access quantity of the system is improved.

The invention discloses a reusable rocket LRU repair level dynamic decision-making method and system, and relates to the technical field of aerospace equipment maintenance management, and the method comprises the steps: collecting the full life cycle data of an LRU; a correlation library is constructed after preprocessing, and a loss mode, a maintenance candidate scheme and a key constraint threshold value are matched according to the accumulated emission times N; performing quantitative scoring on the maintenance candidate schemes based on a four-dimensional index system to obtain a four-dimensional quantitative score; and according to N dynamic allocation weights and in combination with forced constraint judgment, performing weighted calculation on four-dimensional quantitative score calculation, and selecting an optimal maintenance scheme. The prior art mainly depends on an LORA method of a traditional spacecraft and an aircraft maintenance level decision-making method. When the methods are applied to reusable rockets, due to the fact that models of the methods are lack of perception and response mechanisms for key state variables of'cumulative launching times', decision-making accuracy is insufficient, and maintenance scheme optimization requirements in a high-frequency multiplexing scene cannot be met.

The invention discloses a frequency multiplexing spectrum detection device and method, and belongs to the technical field of computational spectroscopy and micro optical sensing. The device comprises a frequency modulation module which is used for carrying out intensity modulation on incident light with a group of different modulation frequencies to generate a frequency-coded modulation light beam; the spectrum modulation module is composed of a plurality of filtering units with different band-pass characteristics and realizes selective response to different wavelength components; the detection module is used for receiving the modulated and filtered optical signal and converting the modulated and filtered optical signal into a time sequence electric signal; and the signal processing and resolving module is used for carrying out frequency domain analysis on the electric signal and solving an inverse problem in combination with a pre-calibrated system response matrix so as to reconstruct a complete spectrum of the to-be-measured light. Multispectral channel parallel detection is realized through a frequency multiplexing mechanism, the luminous flux and the signal-to-noise ratio of the system are remarkably improved, background noise and channel crosstalk are effectively suppressed, and the method can be widely applied to the fields of environment monitoring, portable analysis equipment and the like.

Local quantum communication networks for general-purpose quantum computing may use millions of physical qubits to encode thousands of logical qubits, presenting a substantial hardware architecture challenge. Our modular Quantum System-on-Chip (QSoC) architecture uses a quantum microchiplet (QMC) that features compact two-dimensional arrays of diamond color centers with a resonant dielectric antenna integrated on a foundry-processed chip. Our QSoC architecture enables full connectivity for quantum memory arrays in a set of different resonant frequencies and offers the possibility of further scaling the solid-state physical qubit number via larger and denser QMC arrays and optical frequency multiplexing networking. Our QSoC architecture can efficiently generate a large scale fully connected qubit state by tuning the emitters' emission frequency. Larger qubit resources can achieve a connected qubit cluster state with less tunabiliy. Our QSoC architecture can be readily extended to other solid-state quantum memory platforms.

A satellite relayed quantum communication system comprises a network of one or more chains of near-synchronously moving satellites, equipped with a telescope module that effectively creates a satellite lens. The lens, comprising multiple mirrors, focuses light to contain beam divergence and directs it to the next satellite or to a receiving station, transmitting quantum information across variable distances. A tracking module ensures accurate signal transmission although tracking needs would be minimal within a particular satellite chain due to near-synchronously moving satellites. The system optimizes the relationship between lens diameter, satellite separation, and wavelength of light to minimize diffraction loss. High reflectivity Bragg mirrors minimize reflection loss, and the lens can be constructed using various telescope configurations. Beacon lasers aid in tracking.The system can be adapted for deep space communication. Additional features include positioning quantum light sources and light collection units differently for different protocols for diverse protocols, quantum memories for enhanced efficiency and capabilities, and frequency multiplexing modules for increased quantum information transfer rates.