455 results about "Cyclic shift" patented technology

A wireless transmit receive unit (WTRU) may be configured to transmit uplink control information such as Hybrid Automatic Retransmission Request (HARQ) Acknowledgement or Negative Acknowledgement (ACK / NACK) using a sequence. The HARQ ACK / NACK may comprise one bit or two bits of information, and the WTRU may use a cyclic shift of the sequence to transmit the HARQ ACK / NACK. The WTRU may use different cyclic shifts of the sequence to transmit different HARQ ACK / NACK values and the cyclic shifts may be separated from each other in a manner to facilitate the transmissions. The WTRU may be further configured to receive, from a physical downlink control channel (PDCCH), an indication of a resource block for transmitting the HARQ ACK / NACK.

Systems, methods, and instrumentalities are disclosed for synchronization signal burst, signal design, and / or system frame acquisition. A synchronization signal (SS) block or burst can be received. The SS block or burst can include a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and / or a physical broadcast channel (PBCH). A first cell ID can be determined, and / or a plurality of SSS sequences can be generated. An m0 value (e.g., a first cyclic shift) can be determined from a set of m0 values, for example, based on the generated plurality of SSS sequences. An n1 value (e.g., a second cyclic shift) can be determined from a set of n1 values. A second cell ID can be determined based on, for example, the m0 value and the n1 value. A third cell ID can be determined based on, for example, the second cell ID and the first cell ID.

This disclosure provides a sounding reference signal (SRS) transmission method and apparatus. The method includes: A terminal device receives a cyclic shift offset value sent by a network device; determines a target SRS pattern from M SRS patterns based on the cyclic shift offset value, where the M SRS patterns correspond to N candidate cyclic shift offset values, each SRS pattern in the M SRS patterns includes a quantity of orthogonal frequency division multiplexing (OFDM) symbols and a quantity of SRS combs that are occupied by at least two SRS ports, the at least two SRS ports belong to a same SRS resource, N is greater than or equal to M, and M is an integer not less than 2; and sends an SRS based on the target SRS pattern.

Provided are a communication method and device, the communication method comprising: receiving a contention access resource configuration set, the contention access resource configuration set comprising Nu leading root sequence configuration sets, each leader root sequence configuration set comprises a root sequence value, a power threshold value and the number of leader sequences used for competitive access in leader sequences generated by the root sequence value; comparing the sending power with a power threshold value in each of the Nu leading root sequence configuration sets; for the leader root sequence configuration set with the included power threshold smaller than or equal to the sending power, a plurality of leader sequences with different cyclic shift versions are generated by using root sequence values in the leader root sequence configuration set, the first X leader sequences in the plurality of leader sequences are used for contention access, and the second X leader sequences are used for contention access. The rest of the leader sequences are used for non-competitive access. According to the communication method, the random access efficiency can be improved.

Methods, systems, and devices for wireless communication are described. A user equipment (UE) may periodically transmit one or more sidelink synchronization signals (SLSs), which may enable other UEs to synchronize communications with the UE. The UE may apply cyclic shifts to one or more symbols of the SLSSs in the time domain, which may distinguish between SLSSs transmitted by different UEs, and / or reduce destructive interference between SLSSs. In some examples, a receiving UE may apply one or more cyclic shift hypotheses to an incoming SLSS and perform one or more operations to evaluate the accuracy of each hypothesis. In some examples, a receiving UE may perform an autocorrelation operation to receive an SLSS (e.g., for detecting a cyclic shift), or otherwise evaluate the accuracy of various cyclic shift hypotheses. The UE may determine whether the SLSS is transmitted by a single UE or multiple UEs, which may improve communication reliability of the SLSS.

This disclosure provides methods, components, devices, and systems for ultra-high reliability (UHR) signaling design. Some aspects more specifically relate to an access point (AP) transmitting a frame including a user info field to a wireless station (STA), where the user info field supports UHR parameters. The user info field may include a subfield indicating a coding scheme for communications, where the subfield includes at least two bits to support at least three coding scheme options. Additionally, or alternatively, the AP may transmit a trigger frame indicating for one or more STAs to communicate via distributed resource units (RUs). The AP may arrange the user info fields in the trigger frame to implicitly indicate respective global cyclic shift delay (CSD) indexes to the STAs. A STA receiving the trigger frame may determine a global CSD index corresponding to the STA according to the order of the user info fields.

The invention discloses a human body behavior recognition method, system and device based on a space-time shift attention mechanism and a medium. The recognition method comprises the following steps: firstly, performing position coding on human skeleton data as input of the spatial feature extraction module; secondly, a spatial feature extraction module extracts spatial features through global cyclic shift operation, a physical topology matrix and a spatial self-attention mechanism; then, taking the output of the spatial feature extraction module as the input of a time feature extraction module, and extracting time features by the time feature extraction module through a multi-scale time convolution module and a time transformer module; then, the classification module performs classification according to the features extracted by the space and time module to obtain the output of the single-joint flow; similarly, obtaining the output of the single skeleton flow; and finally, carrying out weighted fusion on the single-joint flow output and the single-bone flow output to obtain final recognition precision. According to the method, richer local and global space-time feature information can be captured, the human skeleton topological relation is effectively supplemented, and the method has the advantage of effectively extracting the local and global space-time dependency relation between the nodes.

The invention discloses a diffusion-scrambling-diffusion image encryption method and system, and relates to the technical field of image encryption, and the method comprises the steps: inputting an original image into a hash function, constructing a hash vector, calculating an initial parameter of a chaotic system according to a key value, and generating a chaotic sequence; performing zero filling on the original image, dividing the original image into non-overlapping image blocks, and performing forward and reverse bidirectional cyclic shift operation to obtain a diffused first encrypted image; generating an initial position and a jump step length of a Josephus ring based on a chaos sequence, and dynamically rearranging the first encrypted image to obtain a second encrypted image; performing image block grouping on the second encrypted image, constructing a Latin square matrix by using a chaos sequence, and performing rearrangement to obtain a third encrypted image; and performing global exclusive-or diffusion, DNA coding, base exclusive-or operation and DNA decoding operation on the third encrypted image, and outputting a final encrypted image. The method has good reversibility and simplicity and convenience in implementation.

This disclosure provides methods, components, devices, and systems for ultra-high reliability (UHR) signaling design. Some aspects more specifically relate to an access point (AP) transmitting a frame including a user info field to a wireless station (STA), where the user info field supports UHR parameters. The user info field may include a subfield indicating a coding scheme for communications, where the subfield includes at least two bits to support at least three coding scheme options. Additionally, or alternatively, the AP may transmit a trigger frame indicating for one or more STAs to communicate via distributed resource units (RUs). The AP may arrange the user info fields in the trigger frame to implicitly indicate respective global cyclic shift delay (CSD) indexes to the STAs. A STA receiving the trigger frame may determine a global CSD index corresponding to the STA according to the order of the user info fields.

The invention provides a single-frame infrared small target detection method based on a variant convolutional neural network. The single-frame infrared small target detection method specifically comprises the steps that a picture input module carries out standardized preprocessing and primary feature extraction on an original image; the efficient channel attention module extracts channel descriptors through global pooling, efficiently calculates weights by using a lightweight network, and performs weighted adjustment on input channels; the FPN module realizes efficient fusion of cross-scale features through a space cyclic shift and channel grouping technology; the residual error convolution module adopts a structural design of combining a convolution path and jump connection, so that the problem of gradient disappearance in deep network training is effectively solved; the feed-forward module integrates an efficient channel attention mechanism, and enhances the response capability of a key feature channel through global information aggregation, channel weight generation and re-calibration operation; the model output module converts high-level features into high-precision mask images and calculates detection performance indexes in real time, all the modules work cooperatively to form a complete feature extraction-fusion-prediction processing chain, and the performance of the infrared small target detector is remarkably improved while the real-time reasoning efficiency is guaranteed.

Various embodiments of this disclosure relate to generation and reception of signals comprising cyclically shifted basis functions. A device may obtain a set of modulation symbols and modulate a plurality of basis functions based on the set of modulation symbols to generate a signal. The plurality of basis functions may comprise cyclically shifted versions of a basis function and a periodic autocorrelation function of the basis function may comprise an ideal (e.g., perfect) periodic autocorrelation function.

Methods, systems, and devices for wireless communications are described. In some examples, a UE may receive an indication of a set of sounding reference signal (SRS) parameters corresponding to a set of SRS resources for transmitting SRSs, where the set of SRS resources may refer to frequency, or time, or both. In some examples, the SRS parameters may include, among other examples, a frequency allocation, a frequency overlap parameter, a number of allocated symbols, a comb value, a cyclic shift, a comb offset, a frequency hopping parameter, a repetition parameter, a symbol grouping parameter, or any combination thereof. The UE may determine an SRS configuration for the one or more SRSs based on the set of SRS parameters and transmit the one or more SRSs based on the configuration. In some examples, the SRS configuration includes a configuration for SRS frequency hopping, or SRS repetition, or both.

The invention provides an interconnected chip-oriented time delay test method and system and a program product. The method comprises the following steps: acquiring a first test signal to obtain an original signal; collecting a second test signal passing through the tested chip to obtain a delay signal; the first test signal and the second test signal are associated periodic binary sequences; the period of the periodic binary sequence is greater than the time delay of the tested chip; intercepting a first intercepted signal in a preset time range from the original signal, and intercepting a second intercepted signal in the preset time range from the delay signal; the time length of the preset time range is not less than the period of the periodic binary sequence; circularly shifting the first intercepted signal or the second intercepted signal towards a set direction, and recording a corresponding target shift digit when the first intercepted signal and the second intercepted signal coincide; and determining the time delay of the tested chip according to the target shift digit. According to the invention, the accuracy of the chip time delay test can be improved.

A signal sending method and a communication apparatus are disclosed. The signal sending method includes: A first communication apparatus determines N sequence sending modes, and sends a first signal based on a first sequence sending mode. The N sequence sending modes include the first sequence sending mode. The sequence sending modes indicate sending orders of N sequences, the N sequences are sent by the first communication apparatus in N periods, and N is a positive integer greater than 1. A cyclic shift value between sending orders indicated by any two adjacent sequence sending modes is 1. The first sequence sending mode is determined based on K second sequence sending modes and the N sequence sending modes, the K second sequence sending modes correspond to a second communication apparatus, and K is a positive integer.

A random number generator comprises a ring generator and one or more inverter-based ring oscillators. The one or more inverter-based ring oscillators is configured to inject bits into the ring generator at a plurality of location. If there is more than one inverter-based ring oscillators, the inverter-based ring oscillators may have different numbers of inverting elements and may inject bits into the ring generator at different locations. At least one of the one or more inverterbased ring oscillators may be configured to inject bits into the ring generator at different locations from outputs of some or all its inverting elements. The random number generator may further comprise blocking circuitry configured to convert, based on a blocking signal, the ring generator into a circular shift register by blocking both the injection from the plurality of inverter-based ring oscillators and internal feedbacks in the ring generator.

An apparatus for a wireless communication system is provided. The apparatus is to transmit a reference signal on a common set of resource elements (REs), the common set of resource elements being used by one or more further apparatuses in the wireless communication system, so that the reference signal of the apparatus and one or more further reference signals of the one or more further apparatuses use the same resource elements. Moreover, the apparatus is to transmit the reference signal depending on a base sequence or a sequence derived from the base sequence and depending on a set of configuration parameters.

Aspects of the present disclosure allow a base station to simultaneously send SSBs to a UE and to associate different ROs or designated subsets of preambles with the simultaneously transmitted SSBs. The base station may configure a time or frequency offset for different ROs, or a number of preamble cyclic shifts associated with the SSBs. The base station then simultaneously sends a plurality of SSBs to the UE, where each of the SSBs is associated with a different beam, and where each of the SSBs is associated with a different RO or a designated subset of preambles. After the UE simultaneously obtains the SSBs from the base station, the UE may determine the offset for one of the different ROs, or the number of preamble cyclic shifts associated with one of the SSBs. The UE may then send a preamble to the base station in response to the determination.

Methods, systems, and devices for designing and configuring reference signals in wireless communication systems are disclosed. An example method for wireless communication includes transmitting, by a wireless device to a network node, a sounding reference signal (SRS), where the SRS is determined by a first parameter and a cyclic shift parameter, and a value of the first parameter hops at a level of a first type of time unit and a value of the cyclic shift parameter hops at a level of a second type of time unit. Another example method for wireless communication includes receiving, by a wireless device from a network node, a configuration for an SRS resource, and transmitting an SRS in the SRS resource, where the configuration includes information associated with one or more time-domain orthogonal cover codes (TD-OCC) or a multiplexing type for multiple SRS ports in the SRS resource.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may determine a cyclic shift configuration for one or more repetitions of a non-interleaved control resource set (CORESET), and monitor for one or more physical downlink control channel candidates in the one or more repetitions of the non-interleaved CORESET based at least in part on determining the cyclic shift configuration for the one or more repetitions. Numerous other aspects are provided.

Devices, systems, and methods for improving performance of a non-volatile memory are described. An example method includes generating, based on a number of program erase cycles of the non-volatile memory, an inversion seed for a page type of the non-volatile memory, and then generating a circular shift flip sequence based on the inversion seed and a flip sequence. The method further includes performing a bit-flipping operation on an input bit sequence based on the circular shift flip sequence to generate an intermediate bit sequence, processing the intermediate bit sequence to generate an output bit sequence, and finally, writing the output bit sequence to a page in the non-volatile memory. In this example, the page that the output bit sequence is written (or programmed) to is of the page type for which the inversion seed and circular shift flip sequence are generated.

The invention provides a quantum circuit system based on an AES cryptosystem and an encryption method. The quantum circuit system based on the AES cryptosystem comprises a byte replacement module which adopts a pre-optimized S-box query circuit to realize non-linear byte replacement; the row shift module completes in-row byte cyclic shift through quantum bit exchange operation; the column confusion module realizes a matrix multiplication circuit based on finite field operation, and a quantum circuit of the column confusion module is generated by a depth-first matrix decomposition algorithm; and the round key adding module realizes XOR operation of a round key and a state by using a CNOT gate array, and a key required by the round key adding module is dynamically generated through a key expansion circuit. And a compact Z-shaped architecture is adopted to optimize time sequence scheduling and resource allocation of each module. On the premise of keeping the quantum bit resource usage amount equivalent to that of an original Z-shaped architecture, the quantum circuit depth is remarkably reduced, and higher fidelity and shorter execution time can be realized on NISQ equipment.

This disclosure provides methods, components, devices, and systems for ultra-high reliability (UHR) signaling design. Some aspects more specifically relate to an access point (AP) transmitting a frame including a user info field to a wireless station (STA), where the user info field supports UHR parameters. The user info field may include a subfield indicating a coding scheme for communications, where the subfield includes at least two bits to support at least three coding scheme options. Additionally, or alternatively, the AP may transmit a trigger frame indicating for one or more STAs to communicate via distributed resource units (RUs). The AP may arrange the user info fields in the trigger frame to implicitly indicate respective global cyclic shift delay (CSD) indexes to the STAs. A STA receiving the trigger frame may determine a global CSD index corresponding to the STA according to the order of the user info fields.

The invention relates to the technical field of information security, in particular to a lightweight encryption and decryption method, which comprises the following steps: acquiring a continuous binary data stream of a sensor and segmenting the continuous binary data stream into fixed-length groups; calling a pre-generated round key sequence and a whitening key, wherein the round key sequence is generated through master key shift operation and round constant iteration; performing XOR operation on the grouped data and the whitening key to output initial confusion data; segmenting the initial confusion data into four equal-length sub-segments to execute multiple rounds of iterative processing, wherein each round comprises 16-bit modular addition operation and fixed-bit cyclic shift; xOR is carried out on the shifted data and a current round key, a sub-segment state is updated according to a preset branch processing rule, and linear transformation is carried out on the updated state by adopting a self-inverse matrix; the last-round output sub-segments are spliced into a ciphertext to be transmitted to an execution mechanism; during decryption, reversely calling the round key sequence, and multiplexing the self-inverse matrix to execute inverse transformation and reverse operation to recover original data. The problem of high encryption delay of industrial control equipment is solved.

A base station is configured to determine a sounding reference signal (SRS) configuration that has a plurality of cyclic shifts for a comb 8 SRS, a plurality of user equipment (UE) ports for transmitting the comb 8 SRS and a mapping of the plurality of cyclic shifts to the plurality of UE ports. The base station is further configured to transmit the SRS configuration to the UE.

The invention discloses a block self-focusing ISAR (inverse synthetic aperture radar) imaging method and system based on an FPGA (field programmable gate array), and the method comprises the steps: obtaining ISAR echo data, and sequentially carrying out the preprocessing and global self-focusing processing, thereby obtaining a global self-focusing correction matrix; dividing the global self-focusing correction matrix into a plurality of sub-matrix blocks in a sliding window partitioning manner; performing minimum entropy self-focusing processing on each sub-matrix block to generate an optimized sub-matrix block; performing fast Fourier transform on the optimized sub-matrix blocks in the azimuth direction to generate two-dimensional image data; determining an offset according to an overlapping region of the adjacent sub-matrix blocks, performing cyclic shift processing on the two-dimensional image data corresponding to the current optimized sub-matrix block in the azimuth direction based on the offset, and aligning the two-dimensional image data corresponding to the previous adjacent optimized sub-matrix block; and outputting the aligned corrected two-dimensional image data as an ISAR imaging result. According to the invention, the azimuth focusing performance is improved, and the overall imaging quality is obviously improved.

An apparatus for a wireless communication system is provided. The apparatus is to transmit a reference signal on a common set of resource elements (REs), the common set of resource elements being used by one or more further apparatuses in the wireless communication system, so that the reference signal of the apparatus and one or more further reference signals of the one or more further apparatuses use the same resource elements. Moreover, the apparatus is to transmit the reference signal depending on a base sequence or a sequence derived from the base sequence and depending on a set of configuration parameters.

The invention discloses a flash memory controller and a flash memory access method. The flash memory controller includes a decoder that performs a decoding operation based on received information obtained by the flash memory and a parity check matrix of a quasi-cyclic low-density parity check code. The decoder comprises a variable node module, a V2C shift module and a check node module which are coupled in series. The decoder further comprises a state data shifting module which is used for circularly shifting the state data of the check node module and then feeding back the state data to the check node module, and the state data shifting module is coupled with the check node module in parallel. The serial coupling only has three stages, so that the decoding iteration convergence speed is improved, and the flash memory access efficiency is further improved.

The present application relates to the technical field of frequency hopping, and provides a construction method, device, equipment, medium and product of a low-collision frequency hopping sequence, which comprises the following steps: determining frequency hopping network parameters, and performing subsequent operations based on the frequency hopping network parameters; constructing a non-repeating element matrix; generating a chaotic sequence from a nonlinear Bernoulli chaotic function, and mapping the chaotic sequence into a multi-element sequence; converting the multi-element sequence into multiple sequences; performing cyclic shift on the non-repeating element matrix based on the multiple sequences to obtain a low-collision frequency hopping sequence. The low-collision frequency hopping sequence constructed by the present application can be applied to multi-subnet asynchronous access, can effectively reduce mutual interference caused by frequency point collision, and has good randomness and can effectively resist external hostile interference, so that it has a wide range of application scenarios in asynchronous frequency hopping networks.

The invention discloses an LDPC (Low Density Parity Check) code check matrix construction method, which is used for processing a low earth orbit satellite ground foundation zone, and comprises the following steps of: A1, determining degree distribution of a basis matrix under a high code rate by adopting an extrinsic information transfer graph EXIT, and realizing construction of the basis matrix under the constraint of optimal degree distribution through extrinsic information transfer P-EXIT based on a basic model graph; a2, based on the code length and the code rate of FEC coding of the DVB-S2 protocol, determining the size and the expansion factor of a basis matrix corresponding to each code rate; a3, determining a finite field and a generator based on an expansion factor, and constructing a linearly independent shift value row vector and cycle coefficient table; a4, selecting row vectors from the cyclic coefficient table to construct a cyclic shift matrix, and performing short ring identification and elimination on the cyclic shift matrix; and A5, performing matrix hashing on the basis of the basis matrix and the cyclic shift matrix to obtain an LDPC check matrix.

The invention discloses a communication method and device. The UE sends a preamble signal, wherein the preamble signal is obtained based on the ZC sequence and the first sequence; wherein the first cyclic shift value of the first sequence is one of M1 cyclic shift values, and M1 is an integer greater than 1. In the embodiment of the invention, the preamble signal can be obtained based on the ZC sequence and the first sequence, the first sequence can be related to the cyclic shift value, for example, different cyclic shift values can correspond to different first sequences, and different first sequences can correspond to different preamble signals. According to the embodiment of the invention, parameters such as a cyclic shift value are added for the lead code signal, so that more lead code signals can be obtained through the change of the parameters, the number of the lead code signals is increased, and more UE can access the network.