38results about "Code shifting or hopping" patented technology

This application discloses a communication method and apparatus. The method includes: A terminal device receives indication information, where the indication information indicates M combinations, and each combination includes one CS value and one comb offset value; or each combination includes a hopping value of one CS value and a hopping value of one comb offset value, where M is a positive integer. Then, the terminal device determines, based on the indication information, a first pseudo-random sequence, and a first time unit, a target CS value and a target comb offset value that correspond to a reference signal in the first time unit. Then, the terminal device sends the reference signal in the first time unit based on the target CS value and the target comb offset value.

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.

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.

Certain aspects of the present disclosure provide techniques for demodulation reference signal (DMRS) sequence selection. One aspect provides a method for wireless communications by a first wireless node. The method generally includes selecting a type of DMRS sequence to use for communications with a second wireless node based on a signal quality associated with the communications, receiving a message having the type of DMRS sequence, and performing channel estimation based on the DMRS sequence using the message.

Various additional and alternative aspects are described herein. In some aspects, the present disclosure provides a method of communication by an apparatus. The method includes selecting one or more resources for transmitting data of a first data stream based on an acyclic graph. The selected resources conform to the acyclic graph comprising data streams at odd levels of the acyclic graph and resources at even levels of the acyclic graph. The acyclic graph includes edges between each level of the acyclic graph. The edges connect the resources allocated to each data stream. The method further includes transmitting the data of the first data stream on the selected one or more resources.

This application discloses a synchronization signal design scheme, processing device, and system, which can be applied to, for example, new wireless systems. A first cyclic shift and a second cyclic shift are determined at least based on a cell identifier, wherein at least one of the first cyclic shift and the second cyclic shift is associated with the primary synchronization signal sequence. A secondary synchronization signal sequence is generated based on a first binary sequence that has been cyclically shifted by the first cyclic shift and a second binary sequence that has been cyclically shifted by the second cyclic shift. The secondary synchronization signal sequence is used together with the primary synchronization signal sequence for synchronization.

A data transmission method and a communication apparatus are provided. The data transmission method includes: A terminal device and a network device each determine a first sequence number of the terminal device on a first time-frequency resource, and determine, from a signature sequence set, a first signature sequence corresponding to the first sequence number, where a difference between quantities of sequence numbers corresponding to any two signature sequences in the signature sequence set is less than or equal to a first value, and sequence numbers corresponding to any two signature sequences in the signature sequence set are different. The terminal device sends data on the first time-frequency resource by using the first signature sequence. Correspondingly, the network device receives the data on the first time-frequency resource. The network device decodes the data based on the first signature sequence. According to embodiments of this application, a centralized collision of signature sequences can be avoided, and a degree of distinguishing between terminal devices by using the signature sequences can be improved.

Devices, apparatus, and methods, including computer programs encoded on storage media, alter at least one of comb offset, cyclic shift and TD-OCC to randomize SRS interference at unintended receivers. A user equipment (UE, 102) receives (322), from a network entity, an SRS-randomization configuration specifying parameters and / or a hopping pattern enable applying at least one of: a comb offset hopping, a cyclic shift hopping, or a time-domain orthogonal cover code (TD-OCC) hopping. The UE generates (326) an SRS using one or more of the comb offset hopping, the cyclic shift hopping and the TD-OCC hopping based on the parameters and / or the hopping pattern. The UE transmits (328), to the network entity, the SRS.

A root sequence cyclic shift method and device, the method comprising: a communication device determines a cyclic shift of a root sequence, the cyclic shift of the root sequence being associated with a sequence length, a root sequence number, a maximum round-trip delay and a maximum Doppler frequency shift of the root sequence; and the communication device determines a cyclic shift sequence according to the cyclic shift of the root sequence, and the fuzzy function of the cyclic shift sequence is equal to zero in the maximum round-trip delay and the maximum Doppler frequency shift range. By adopting the method provided by the invention, the communication device can obtain the cyclic shift sequence with the fuzzy function equal to zero according to the root sequence.

In the multiple short sequence based SRS, multiple items of sequence data having a short sequence length corresponding to a partial band are used for transmitting SRS in discontinuous bands. In the multiple short sequence based SRS, a terminal specifies a frequency domain to be used for transmitting a reference signal using predetermined sequence data, applies a phase shift index associated with the specified frequency domain to the reference signal, and transmits the reference signal to which the phase shift index is applied by using the specified frequency domain.

The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The present disclosure provides an SRS hopping scheme in a wireless network in which comb structures and / or cyclic shift hopping may be used in intra-slot or inter-slot scenarios to reduce / randomize interference.

In the multiple short sequence based SRS, multiple items of sequence data having a short sequence length corresponding to a partial band are used for transmitting SRS in discontinuous bands. In the multiple short sequence based SRS, a terminal specifies a frequency domain to be used for transmitting a reference signal using predetermined sequence data, applies a phase shift index associated with the specified frequency domain to the reference signal, and transmits the reference signal to which the phase shift index is applied by using the specified frequency domain.

Example embodiments of the present disclosure are directed to methods, devices, apparatuses and computer readable storage medium for start stop bit compressed permutation matrix In the method, a first apparatus receives, from a second apparatus, a first permutation matrix associated with at least one start / stop bit for transmission of data sequences to the first apparatus. The first permutation matrix is obtained by compressing a second permutation matrix indicating an order of the data sequences with the at least one start / stop bit. Furthermore, the first apparatus reorders the data sequences based on the first permutation matrix. Thereby, the efficiency of permutation matrix compression can be improved.

A communication method may include a first apparatus that 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.

A user equipment, UE, comprising a transceiver, which, in operation, monitors a plurality of occasions for reception of a low-power signal indicating at least one sequence; and circuitry, which, in operation, determines a hopping interval for the at least one sequence of the low-power signal, wherein the at least one sequence changes according to a predetermined rule at the hopping interval, wherein the transceiver, in operation, receives, on one of the plurality of occasions, the low-power signal.

A method for a transmitter to transmit a signal to a receiver in a communication system. The method includes: generating at least one spread frame having N spread symbols, obtained by mapping N encoded symbols onto N cyclically shifted versions of a given base sequence, with N≥2; and generating at least one overmodulated frame by modulating the at least one spread frame comprising N spread symbols by an overmodulation sequence of size N.

A method includes receiving, at a user equipment device (UE) from a transmission and reception point (TRP), an uplink CSI measurement configuration including a sounding reference signal (SRS) resource configuration indicating one or more of SRS resource randomization configurations of a cyclic shift, a comb offset, and a time domain orthogonal cover code (TD-OCC); and transmitting SRSs in a sequence of symbols, according to the SRS resource configuration, wherein the SRSs are determined according to the one or more of SRS resource randomization configurations of the cyclic shift, the comb offset, and the TD-OCC, values of the one or more of SRS resource randomization configurations being randomized symbol-by-symbol according to at least one of a cell-specific identity (IDcell) and a UE-specific identity (IDue).

Methods, systems, and devices for mapping schemes for cyclic shift based uplink control transmissions in mobile communication technology are described. An exemplary method for wireless communication includes transmitting, by a wireless device over a control channel, an M-bit payload using N symbols, wherein M and N are positive integers, wherein each of the N symbols is represented using a base sequence (u(n, m)) and a cyclic shift (ncs(n, m)) of the base sequence, wherein n=0, 1, . . . (N−1) indexes a symbol in the N symbols, wherein m=0, 1, . . . (2M−1) indexes a combination set, wherein m and n are non-negative integers, wherein the cyclic shift for a j-th symbol is based on a cyclic shift for a (j−1)-th symbol, and wherein j=1, 2, . . . (N−1) is a positive integer.

An apparatus receives a first permutation matrix associated with at least one start / stop bit for transmission of data sequences to the first apparatus. The permutation matrix is obtained by compressi

This application discloses a communication method and apparatus. The method includes: A terminal device receives indication information, where the indication information indicates M combinations, and each combination includes one CS value and one comb offset value; or each combination includes a hopping value of one CS value and a hopping value of one comb offset value, where M is a positive integer. Then, the terminal device determines, based on the indication information, a first pseudo-random sequence, and a first time unit, a target CS value and a target comb offset value that correspond to a reference signal in the first time unit. Then, the terminal device sends the reference signal in the first time unit based on the target CS value and the target comb offset value. According to the method, the terminal device uses one combination of a comb offset value and a CS value in the M combinations, so that a conflict between CS values or comb offset values used by different terminal devices can be avoided, to maximize randomization of interference between reference signals of any two terminal devices in a cell.

This disclosure is directed to methods, systems, and devices related to wireless communication, and more specifically, to support high capability user equipment and to improve uplink A method of wireless communication, comprising receiving, by a wireless communication device, from a network device, a configuration of a sounding reference signal (SRS) resource with a plurality of ports or port groups; determining, by the wireless communication device, a parameter for an SRS port or an SRS port group of the SRS resource; and wherein the parameter comprises at least one of: one or more symbols, a comb offset, or a cyclic shift (CS) offset.

Methods, systems, and devices for wireless communication are described. In some systems, a user equipment (UE) or a base station or both can determine a configuration for partitioning a set of sequences into a plurality of sequence pools associated with a plurality of UEs. The UE or the base station or both can determine a sequence pool associated with the UE based on the configuration, which can include parameters or instructions for determining the sequence pool associated with the UE. The UE or the base station or both can determine a subset of sequences from the sequence pool associated with the UE and construct a codebook including the subset of sequences. The UE can select a sequence from the constructed codebook based on a number of bits of a payload and can transmit the payload to the base station using the selected sequence.

In the multiple short sequence based SRS, multiple items of sequence data having a short sequence length corresponding to a partial band are used for transmitting SRS in discontinuous bands. In the multiple short sequence based SRS, a terminal specifies a frequency domain to be used for transmitting a reference signal using predetermined sequence data, applies a phase shift index associated with the specified frequency domain to the reference signal, and transmits the reference signal to which the phase shift index is applied by using the specified frequency domain.

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 present invention is designed to improve the performance of uplink control channels that are code-multiplexed among a plurality of user terminals. A user terminal has a transmission section that transmits an uplink control channel, containing data, to which an orthogonal cover code is applied before discrete Fourier transform, and a demodulation reference signal, to which a cyclic shift is applied, and a control section that executes control so that the cyclic shift is determined based on an index of the orthogonal cover code, a time resource of the demodulation reference signal and a length of the orthogonal cover code or a maximum value of the length.

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 802.11be 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 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 effectively improves accuracy of a sensing result.

A cyclic shift method for a root sequence and an apparatus are provided. The method includes: A communication apparatus determines a cyclic shift of the root sequence, where the cyclic shift of the root sequence is associated with a sequence length of the root sequence, a root sequence number, a maximum round-trip time, and a maximum Doppler frequency shift; and the communication apparatus determines a cyclic shift sequence based on the cyclic shift of the root sequence, where an ambiguity function of the cyclic shift sequence is equal to zero within a range of the maximum round-trip time and the maximum Doppler frequency shift. According to the method in this application, the communication apparatus can obtain, based on the root sequence, the cyclic shift sequence whose ambiguity function is equal to zero.