620 results about "Cyclic shift" patented technology

According to embodiments, a UE receives, from a network device, a configuration of a sounding reference signals (SRS) resource with 8 antenna ports, a transmission comb configuration for the SRS resource, and a cyclic shift (CS) configuration for the SRS resource. The transmission comb configuration indicates a comb value K. K is one of 2, 4, or 8. The transmission comb configuration further indicates a configured comb offset (k). k is an integer between 0 and K−1. The CS configuration indicates CS positions. The UE maps each port of the 8 antenna ports to corresponding resource elements (REs) in the frequency domain and a corresponding CS. The corresponding REs are a subset of a plurality of REs and on every K-th RE with an offset based on the configured comb offset (k) within an SRS transmission bandwidth. The UE transmits SRSs using the 8 antenna ports based on the mapping.

Techniques for bus sharing are disclosed. A plurality of bus requesters is coupled to a common bus. Access requests are stored in a request vector. A relative request vector (RRV) is generated by circular shifting by a rotate value to the right. The RRV is examined for the first asserted bit beginning at a first bit position proceeding in a first direction. A one-hot encoded relative grant vector is generated based on the first asserted bit. A grant vector (GV) is produced by circular shifting by a rotate value to the left. Access is granted. The rotate value is updated, affecting the priority of next grant. The GV is compared to a grant history vector (GHV). A count grant is adjusted. The count grant indicates a number of times that the bus requester indicated by the GHV was granted successive accesses to the common bus.

The present application relates to devices and components including apparatus, systems, and methods to perform a codebook-based SRS transmission. In an example, eight or more antenna ports are used for the codebook-based SRS transmission. In this example, a UE can be configured by a base station for the codebook-based SRS transmission, whereby the configuration indicates a particular comb configuration, symbol index configuration, and / or cyclic shift configuration to allow the use of the eight or more antenna ports.

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.

A sensing-based communication method and an apparatus are provided, which are applied to a UWB-based WPAN system, for example, the 802.15.4a protocol, the 802.15.4z protocol, the 802.15.4ab protocol, or the like in 802.15 series protocols; and may be further applied to a WLAN system, a sensing system, and the like in 802.11 series protocols including a next-generation Wi-Fi protocol of 802.11ax like 802.11be, Wi-Fi 7, or EHT, and a next generation of 802.11 be like Wi-Fi 8, or UHR. A transmit end obtains control information, and sends a sensing signal based on the control information. Correspondingly, a receive end obtains the control information, and performs processing based on the control information. The control information indicates M cyclic 10 shift bit quantities corresponding to M sequences, and at least two relative cyclic shift bit quantities in relative cyclic shift bit quantities between adjacent sequences in the M sequences are different.

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.

systems and methods include a transmitter with a control unit that is configured to generate a code, including data identifying a plurality of regions and a transmitter-specific cyclic shift scheme. The cyclic shift scheme results in a re-arrangement of the regions (using a change of time offset) that is different (transmitter-specific) for each of the transmitters. The transmitter generates a signal based on the code and transmits the signal via an antenna. The radar system includes a receiver configured to receive an echo of the signal via a second antenna that is reflected from a target and identifies the transmitter from the echo based on the transmitter-specific cyclic shift scheme.

In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The method is a method for wireless communication of a wireless device. The wireless device generates a time-domain cyclic shift code set for a transmit antenna set. Each time-domain cyclic shift code in the set corresponds to one shift in a Doppler frequency domain. The wireless device applies the time-domain cyclic shift code set to transmit signals from the transmit antenna set to simultaneously: perform Doppler division multiplexing for transmit antenna port diversity and execute beam sweeping for beam management. The wireless device transmits the signals using the transmit antenna set.

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.

Some examples of the techniques described herein may facilitate transmissions using three antenna ports. For instance, some of the approaches described herein may enable uplink sounding (e.g., sounding reference signal (SRS)) transmission using three transmit antenna ports. In some examples, a four-port SRS resource may be reused for three-port SRS transmission. In some examples, a two-port SRS resource and a one-port SRS resource may be utilized for a three-port SRS transmission. Several aspects of SRS improvements may be provided to support uplink transmissions with three antenna ports. For instance, a coherent or non-coherent uplink codebook may be specified to facilitate three-antenna-port codebook-based transmissions. Some of the approaches may manage uplink transmission power or SRS resource signaling. For example, some of the techniques may provide SRS port to cyclic shift mapping or SRS power control.

The invention discloses an incoherent index modulation method and system based on a fluid antenna, and belongs to the field of wireless communication. A plurality of fluid antenna transmitting modes are preset for a fluid antenna wireless communication system, and a beam forming vector corresponding to each transmitting mode is optimized by using a closed expression of a fluid antenna space coding gain, so that a transmitter can transmit a phase shift keying modulation symbol while transmitting the phase shift keying modulation symbol; spatial bit information can be implicitly transmitted through a cyclic shift value of a fluid antenna emission mode index value, and the whole communication process does not need to depend on channel state information, so that the multiple-input-multiple-output communication method for fluid antenna energization without channel estimation is realized.

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.

User equipment, especially transmitter user equipment, configured to transmit a data packet using a data signal, e.g., PSCCH and PSSCH, using one or more certain subchannels or resource blocks in one or more certain slots using sidelink communication and expecting a feedback message in a feedback signal, e.g., in a PSFCH, from a receiver user equipment of the data packet, wherein the feedback signal is receivable within PSFCH candidates, at more than one time and / or frequency and / or cyclic shift locations. User equipment, especially receiver user equipment, configured to receive a data packet using a data signal using one or more certain subchannels or resource blocks in one or more certain slots using sidelink communication and to transmit a feedback message in a feedback signal to a transmitter user equipment, wherein the feedback signal is transmittable within PSFCH candidates at more than one time and / or frequency and / or cyclic shift locations.

Provided is a multi-access method (500, 600) and a communication apparatus (102) for uplink transmission of different waveforms. The method (500) comprises receiving (502) an allocation of one or more indices for a respective users for uplink transmission of modulated symbols. The method further comprising transforming (504) the modulated symbols using a first matrix (P) for each index among the one or more indices. Furthermore, the method comprises generating (506) discrete-time signals by upsampling by a factor of plurality of indices by stuffing one or more zeroes, and circularly shifting the upsampled symbols. The method further comprises transmitting (508) uplink signals by combining the generated discrete-time signals of each user for the allocated one or more indices.

A transmitter in a wireless communication network includes a bits-to-symbol mapper that produces a plurality of data symbols; and a waveform modulator that receives a first discrete-time waveform and at least a second discrete-time waveform that comprises a cyclic shift of the first discrete-time waveform; modulates a first one of the plurality of data symbols onto the first discrete-time waveform and modulates a second one of the plurality of second data symbol onto the second discrete-time waveform, to produce a plurality of modulated discrete-time waveforms; and sums the plurality of modulated discrete-time waveforms to produce a modulated discrete-time signal to be transmitted in the network. The first discrete-time waveform and at least the second discrete-time waveform are multicarrier signals.

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 relates to the technical field of passwords, in particular to an Ascon algorithm optimization implementation method based on an RISC-V processor, and the method comprises the steps: reconstructing S-box substitution logic through RISC-V assembly; 64-bit cyclic shift is optimized through a bit interleaving technology; fully expanding assembly codes to eliminate cycle overhead; the intermediate state and the key are stored in a register. According to the method, the execution efficiency and performance of the Ascon algorithm on an RISC-V platform are remarkably improved through multiple technical means, redundant bit operation is effectively reduced through reconstruction of S-box substitution logic, calculation delay is reduced through optimization of bit operation sequences and multiplexing of temporary variables, 64-bit cyclic shift operation is decomposed through the bit interleaving technology, and the calculation efficiency of the algorithm is improved. The operation is more efficient, the overhead of loop control is eliminated through an assembly-level full-expansion technology, unnecessary jump instructions are avoided, the execution speed is further improved, and the problems of insufficient Ascon algorithm performance and resource waste caused by low utilization rate of the RISC-V architecture are effectively solved.

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.

A method for selecting a cyclic shift diversity sequence, and a related apparatus are disclosed. The method includes: sending a frame by using a cyclic shift diversity (CSD) sequence, comprising: generating a frame, wherein the frame comprises a first data subframe conforming to a first communication mechanism and a third data subframe conforming to the first communication mechanism; sending the frame, wherein the first data subframe and the third data subframe are sent by using a cyclic shift diversity sequence. Under an EHT standard, a preferred cyclic shift diversity sequence can be obtained through selection from massive combinations of CSD values. Work efficiency is improved, and an operation burden is reduced.

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.

The invention discloses an LDPC encoder based on a DVB-S2 protocol, a transmitting terminal and a test platform, and the LDPC encoder comprises an information bit matrix multi-port input RAM which is used for storing input information bits; the check matrix multi-port ROM is used for storing a check matrix; the accumulative sum matrix RAM is used for storing the accumulative sum matrix generated by the accumulative sum matrix calculation module; the check bit matrix RAM is used for storing a check bit matrix; the check matrix calculation module reads a check matrix from the check matrix multi-port ROM, and the check matrix is converted into a cyclic shift matrix through preprocessing; the accumulative sum matrix calculation module is used for reading information bits from the information bit matrix multi-port input RAM, executing loop right shift and accumulative operation, and calculating to obtain an accumulative sum matrix; and the check bit matrix initialization module is used for calculating a check bit matrix initialization vector according to a calculation result of the accumulation and matrix calculation module.

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.