272 results about "Cyclic shift" patented technology

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.

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.

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.

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.

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.

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.

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.

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 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.

Techniques pertaining to global cyclic shift delay (CSD) index assignment for 60MHz distributed-tone resource unit (DRU) short training field (STF) transmission in wireless communications are described. An apparatus (e.g., a station (STA) ) performs a wireless communication by: (a) generating and transmitting a DRU of a physical-layer protocol data unit (PPDU) with tones of the DRU distributed on a 60MHz distribution bandwidth of an 80MHz frequency subblock of two or more frequency subblocks of a wider bandwidth; or (b) receiving and processing the DRU. In performing the wireless communication, the apparatus applies a global CSD on transmission of a STF for the DRU in the distribution bandwidth of 60MHz.

A system can utilize a first common physical uplink control channel (PUCCH) format 1 communication format for broadband cellular communications with user equipment via a channel. The system can estimate a first channel characteristic based on performing channel estimation on the channel over uplink signals, which comprises a Doppler spread. The system can estimate a second channel characteristic based on the performing of the channel estimation over uplink signals, which comprises a delay spread. The system can determine a number of symbols for a second common PUCCH format 1 communication format with the user equipment based on the first channel characteristic. The system can determine a group of initial cyclic shift indices for the second common PUCCH format 1 communication format with the user equipment based on the second channel characteristic. The system can communicate with the user equipment according to the second common PUCCH format 1 communication format.

The technology disclosed herein relates to configuration of sounding reference signals (SRS) for supporting three-port uplink transmissions. An example wireless communication method includes receiving, at a user equipment (UE) from a base station (BS), a sounding reference signal (SRS) configuration, the SRS configuration indicating an SRS resource with three ports; determining, by the UE, respective cyclic shifts (CSs) for the three ports of the SRS resource; and transmitting, by the UE to the BS, an SRS transmission in accordance with the respective CSs for the three ports of the SRS resource.

The invention discloses a communication method and device, relates to the technical field of communication, and can reduce the probability of AL ambiguity so as to improve the reliability of communication. The method comprises the following steps that: network equipment determines an output sequence length E after rate matching according to a target aggregation level, and determines a polarization coding length N according to the E; performing polarization coding on the first sequence to obtain a second sequence with the length of N; performing cyclic shift on the second sequence to obtain a third sequence; and outputting the third sequence. Wherein N is integer power of 2; the first sequence comprises information bits and cyclic redundancy check bits; the initial bit of the third sequence is the Yth bit in the second sequence, and Y is determined according to the target aggregation level.

A communication method and a communication apparatus in which a device may perform encoding or decoding based on an LDPC matrix, the LDPC matrix being determined based on an LDPC basis matrix, Zc, a, and b, a first region of the basis matrix including L types of elements, 2 < = L < = 2a * b, a and b not being 1 at the same time, Zc, a, and b being used to lift the elements in the first region to a (a * Zc) * (b * Zc) matrix, the matrix including (a * b) (Zc * Zc) matrices, each Zc * Zc matrix is an all-zero matrix or a cyclic shift matrix, the first sub-matrixes of the L elements are different, and the first sub-matrixes are matrixes formed by replacing the cyclic shift matrixes in (a * b) (Zc * Zc) matrixes of the matrix with the lifted corresponding elements with Zc * Zc unit matrixes. According to the method, the decoding performance of the LDPC code can be improved.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) can map hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback including first HARQ-ACK bits associated with a high priority and second HARQ-ACK bits associated with a low priority to a sequence cyclic shift value that provides unequal reliability between the first HARQ-ACK bits and the second HARQ-ACK bits. The UE can transmit the HARQ-ACK feedback to a base station via a physical uplink control channel (PUCCH) format 0. Numerous other aspects are provided.

A wireless terminal device 110, e. g. a UE 110, is disclosed for communication with a wireless network device 120, e. g. a base station 120. The wireless terminal device 110 is configured to obtain a plurality of generalized Zadoff-Chu, ZC, sequences, wherein each of the plurality of generalized ZC sequences is based on a cyclic shift of an original ZC sequence of length vZC and root value v multiplied with a respective frequency shifting sequence of length vZC. Moreover, the wireless terminal device 110 is configured to generate a preamble based on one or more of the plurality of generalized ZC sequences and to transmit the preamble.

The invention relates to a spread spectrum receiver and a test method. A method of characterizing a LoRa modulated signal or any such signal having multiple chirps as symbols. It foresees: sampling and storing the signal, determining the phase of at least one chirp in the signal, and determining a timing error and / or a frequency error based on the phase, the timing error being extracted by the height of the discontinuity jump in the phase at the cyclic shift position, and the frequency error being obtained by the slope of the phase. The method can be applied to a dedicated receiver for characterizing a LoRa transmitter.

The invention discloses an aircraft shape high-precision aerodynamic design method and device based on a quantum discrete adiabatic algorithm, and relates to the technical field of quantum computing. The method comprises the following steps: constructing a linear system model according to target aerodynamic data based on a computational fluid mechanics method; based on the cyclic shift basis matrix, according to the sparse coefficient matrix and the source item vector, performing block coding by using a linear combination unitary operator technology to obtain a block coding unitary operator; based on a preset iteration operator, constructing a walking operator according to the block coding unitary operator; according to the walking operator, line preparation is carried out through a cyclic calling method, and a quantum solving line is obtained; executing a quantum solving line, and measuring flow field quantum state information; and based on the target aerodynamic data, according to the flow field quantum state information, carrying out high-precision aerodynamic optimization design on the shape of the aircraft by utilizing an aerodynamic integration method. The high-precision aerodynamic design method for the aircraft profile is efficient and accurate based on the quantum discrete adiabatic algorithm.

The application belongs to the technical field of radar signal processing, and particularly relates to a multi-target DDMA demodulation method based on sub-band unit accumulation. Firstly, initial parameters of a radar system are initialized, then a DDMA-MIMO signal model is constructed according to the system parameters, and then 2D FFT processing of distance dimension and Doppler dimension is performed on the received signals. Then, the multi-target DDMA demodulation method based on sub-band unit accumulation is used for demodulation, and the characteristics are that under each angle domain, the whole RV-MAP is copied, the energy of each unit cell of all sub-bands is recorded, and energy accumulation of cyclic shift with a length of the number of transmitting antennas is performed to obtain the sub-band group energy of each unit. Then, the maximum accumulated energy of each unit sub-band group is found, threshold judgment is performed according to the energy to obtain the correct sub-band where the target is located. Finally, the real distance and speed of the target are calculated according to the distance formula and the speed formula. The method provided by the application can well process the case that the traditional method cannot be applied to the multi-target scene.

Embodiments of this application provide a communication method, a communication apparatus, and a communication system. The method may include: A first apparatus obtains a cyclic shift sequence, where the cyclic shift sequence includes a delay domain cyclic shift and a Doppler cyclic shift; and outputs the cyclic shift sequence, where the cyclic shift sequence is used to generate a random access signal or a sensing signal. According to embodiments of this application, a capacity of available sequences can be increased by performing cyclic shifts in delay domain and Doppler domain.

The invention relates to a communication traffic prediction method based on cyclic shift, and the method comprises the steps: S1, dividing a traffic sequence into unequal-length fragments according to different time periods, carrying out the standardization through downsampling, inputting the standardized fragments into a numerical mapping and position embedding module, and obtaining a representation matrix; s2, performing cyclic shift operation on the divided adjacent flow sequences by adopting a shift mode, establishing sparse space-time correlation, and performing primary self-attention calculation on the shifted flow sequences along the time dimension to obtain a space-time representation matrix; and S3, after reverse cyclic shift is performed on the space-time representation matrix obtained in the step S2, a fragment is restored to an initial position, and a final prediction result is output after the fragment passes through a flattening layer and a linear layer. Compared with the prior art, the method has the advantages that the prediction efficiency is effectively improved while the prediction accuracy is ensured, and the like.

The invention discloses a detection method and system for a long-distance scene PRACH signal and a medium, and relates to the technical field of 5G mobile communication. The method comprises the following steps of: carrying out time delay detection (rough detection) on repetitive sequences by utilizing the correlation of ZC sequences to judge which repetitive sequence the main peak is located in, and judging which window the main peak appears in, then carrying out five-window merging processing (fine detection) on the repetitive sequences after being repeatedly merged, and judging which window the main peak appears in. Estimating accurate time offset and frequency offset by using the minimum path between the main peak and the window cyclic shift value; according to the scheme, the PRACH signal detection algorithm is optimized, and the remote detection of the PRACH signal in a large frequency offset scene is realized based on the modes of coarse detection, fine detection and five-window combination judgment.

According to an embodiment of the present invention, proposed is an apparatus for receiving a control channel in sidelink communication, wherein the control channel is transmitted in pair with a data channel in one subframe and has a fixed size in the frequency domain, and the apparatus may comprise: a memory configured to store code for receiving the control channel; and a processor configured to execute the code to carry out operations for receiving the control channel. The operations may include: generating a reference signal for the control channel by using a first cyclic shift (CS) among a plurality of cyclic shifts (CSs); carrying out a differential correlation operation on a correlation between a reference signal for a received candidate control channel and the generated reference signal; applying phase rotation or phase correction to a result of the differential correlation operation to detect a minimum phase value and a CS corresponding to the minimum phase value; and by using the minimum phase value and a normalized power value obtained on the basis of the differential correlation operation, determining whether detection of the presence of the control channel is successful or determining a CS used for the control channel.

The embodiment of the invention provides a communication method and device, and relates to the technical field of communication, and the method comprises the steps: receiving first configuration information which is used for configuring a first root sequence; and transmitting a first reference signal, wherein the first reference signal is determined based on the first root sequence and a first cyclic shift value. The communication method and device provided by the embodiment of the invention are used for enabling the network equipment to correctly identify the first reference signal of the first terminal, and performing accurate channel estimation on the first reference signal of the first terminal, so as to correctly demodulate the data of the first terminal.

A communication method and apparatus, relating to the technical field of communications, and capable of reducing the probability of AL ambiguity, so as to improve the communication reliability. The method comprises: a network device determining, on the basis of a target aggregation level, a length E of an output sequence having undergone rate matching, and determining a polar encoding length N on the basis of E; performing polar encoding on a first sequence to obtain a second sequence having a length of N; performing cyclic shift on the second sequence to obtain a third sequence; and outputting the third sequence. N is an integer power of 2; the first sequence comprises information bits and cyclic redundancy check bits; and a start bit of the third sequence is the Y-th bit in the second sequence, and Y is determined on the basis of the target aggregation level.

A reference signal transmission method, and an apparatus. The method comprises: determining cyclic shifts respectively corresponding to N antenna ports, wherein N=16; on the basis of the cyclic shifts respectively corresponding to the N antenna ports, determining reference signal sequences respectively corresponding to the N antenna ports; and, sending corresponding reference signals on time-frequency resources respectively corresponding to the N antenna ports, the reference signal sequence corresponding to the i-th antenna port among the N antenna ports being mapped to the i-th frequency domain resource, the i-th frequency domain resource being determined on the basis of a frequency domain comb corresponding to the i-th antenna port, the N antenna ports corresponding to the same time domain resource, and the total number of antenna ports corresponding to each time domain resource being N. By means of using the method, terminals can send reference signals by means of 16 antenna ports, and can send, on each time domain resource, reference signals respectively corresponding to all of the 16 antenna ports, such that access network devices can quickly acquire the reference signals of all of the 16 antenna ports.