53results 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.

A non-coherent communication system in which a transmitting device does not transmit a pilot / DMRS, such that the receiving device may be configured to determine or decode the information received from the transmitting device without performing any channel estimation. An apparatus for wireless communication at a receiving device receives, from a transmitting device, a non-coherent signal having data. The apparatus may determine data from the received signal without performing a channel estimation. In another aspect, an apparatus at a transmitting device divides an information payload including a set of bits into multiple subsets of bits, maps each of the multiple subsets of bits into a respective sequence of complex symbols, generates a non-coherent transmission signal based on the respective sequences, and transmits the non-coherent transmission signal to a receiving device.

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.

A transmitter according to one aspect of the present invention generates a pulse code train by encoding transmission information according to assignment of each of one or more pulse code trains to a respective codeword, and transmits the generated pulse code train. Each of the one or more pulse code trains includes four or more pulses. Each of the one or more pulse code trains is designed so that any pair of the one or more pulse code trains has a maximum of two common pulses under all possible shifts of a discrete number of time slots. This makes it possible to provide a communication technique that can be expected to improve the data rate in data communication by a large number of devices.

This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for wireless range extension for communication in a wireless local area network (WLAN). In some aspects, a first WLAN device and a second WLAN device may exchange one or more management frames advertising support for a non-orthogonal frequency-division multiplexing (non-OFDM) data rate for communications via one or more non-2.4GHz bands. In some aspects, the non-OFDM data rate may be a data rate of a plurality of data rates associated with an IEEE 802.11b standard, and the one or more non-2.4GHz bands may include one or more of a 3.5GHz band, a 5GHz band, a 6GHz band, a 45GHz band, and a 60GHz band. The first and second WLAN devices may select the non-OFDM data rate and at least one of the non-2.4GHz bands for exchange data communications.

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.

A terminal device obtains coding information that includes a first information bit and a second information bit. The terminal device selects, based on the first information bit, K groups from a codebook having L groups as activation groups, where both L and K are positive integers, and K is less than L. The terminal device then selects, based on the second information bit, a sequence from each of the activation groups as an activation sequence, and obtains a first sequence by superimposing the K activation sequences.

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.

A communication apparatus includes: storing means for storing information indicating a first base set including a first base sequence to an N-th base sequence; shifting means for generating a first shift sequence to an N-th shift sequence by determining a shift amount based on transmission data, and cyclic shifting an n-th base sequence (n being an integer from 1 to N) by the shift amount; holding means for holding timing information indicating transmission timings of sequences; and transmitting means for transmitting each shift sequence according to the timing information, wherein the first base sequence to the N-th base sequence satisfy a first condition of: a total across the first base sequence to the N-th base sequence of correlation values of autocorrelation is not 0 when a shift amount is 0, and a total across the first base sequence to the N-th base sequence of correlation values of autocorrelation is 0 when a shift amount is different from 0 used in data transmission.

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.

Embodiments of this application are applied to a wireless local area network system that supports 802.11 series protocols, for example, a next-generation Wi-Fi protocol of IEEE 802.11ax, such as 802.11be, Wi-Fi 7, or EHT, or a next-generation protocol of 802.11be like Wi-Fi 8; and may be further applied to a UWB-based wireless personal area network system and a sensing system. Embodiments of this application provide a signal processing method and an apparatus. The method includes: receiving a first signal that is obtained based on a spread spectrum sequence set and N data symbols, where the spread spectrum sequence set includes M spread spectrum sequences whose lengths are L, the M spread spectrum sequences one-to-one correspond to M data symbols with different values, and values of lth chips in any two of the M spread spectrum sequences are the same; and performing frequency offset estimation based on the first signal. According to this application, the first signal includes a fixed signal segment, so that a receive end device can perform frequency offset estimation based on the first signal.

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.

This application provides a communication method and a related apparatus, to mitigate interference between codewords of different lengths and reduce complexity of a receiver. The method includes: A terminal device spreads to-be-transmitted data based on a target codeword to obtain spread data, where the target codeword is determined from K codebooks, each of the K codebooks includes at least one codeword, a codeword length is the same within each codebook, codeword lengths of any two of the K codebooks are different, a codeword length of any one of remaining (K-1) codebooks other than a first codebook among the K codebooks is a positive integer multiple of a codeword length of the first codebook, the first codebook is a codebook whose codeword length is the shortest among the K codebooks, and K is an integer greater than 1; and the terminal device sends the spread data to a network device, and the network device despreads the spread data based on the target codeword.

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).

The embodiment of the invention provides a communication method, a communication device and a communication system, and the method can comprise the steps that a first device obtains a cyclic shift sequence, and the cyclic shift sequence comprises time delay domain cyclic shift and Doppler cyclic shift; and outputting a cyclic shift sequence, wherein the cyclic shift sequence is used for generating a random access signal or a sensing signal. According to the embodiment of the invention, the capacity of the available sequence can be increased by performing cyclic shift on the time delay domain and the Doppler domain.

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

A sensing-based communication method and apparatus are provided that are applicable to UWB-based WPAN systems, such as 802.15.4a, 802.15.4z, and 802.15.4ab protocols in the 802.15 series of protocols, and further applicable to WLAN systems and sensing systems in the 802.11 series of protocols, including next-generation Wi-Fi protocols such as 802.11ax (e.g., 802.11be, Wi-Fi 7, or EHT) and next-generation 802.11be protocols such as Wi-Fi 8 and UHR. A transmitting end obtains control information and sends a sensing signal based on the control information. Correspondingly, a receiving end obtains the control information and performs processing based on the control information. The control information indicates M cyclic shift bit numbers corresponding to M sequences, and at least two relative cyclic shift bit numbers among the relative cyclic shift bit numbers of adjacent sequences in the M sequences are different. This effectively improves the accuracy of the sensing result.