Abstract: A signal sending method, a signal receiving method, and a device for signal transmission or receiving are provided. A part that is of a first signal and that is carried on a kth subcarrier in an ith subcarrier group in N subcarrier groups is xi,nid(k), and a sequence {si,nid(k)} related to xi,nid(k) is one of enumerated sequences. The enumerated sequences are sequences with relatively good cross-correlation. Therefore, for two subcarrier groups, provided that selected {si,nid(k)} is two of the enumerated sequences, cross-correlation between signals carried in the two subcarrier groups can be ensured to be relatively good, thereby reducing interference between the signals and improving channel estimation performance.

Abstract: Embodiments of the present disclosure provide, among other implementations, sequence determining methods. One example method provides a sequence group, and one sequence group number is corresponding to at least two sequences, where one sequence is used for mapping to consecutive subcarriers, and at least one other sequence is used for mapping to equally-spaced subcarriers. In some embodiments of the present disclosure, as high as possible cross-correlation between a sending signal obtained after equally-spaced mapping is performed on a sequence in a sequence group can be determined, and a sending signal obtained after continuous mapping is performed on another sequence in the group.

Abstract: The present disclosure relates to signal processing methods and apparatus. One example method includes determining a first sequence {x(n)} based on a preset condition, generating a reference signal of a first signal by using the first sequence, and sending the reference signal on a first frequency-domain resource. The preset condition is y n = A · e j × ? × s n 8 , x n = A · e j × ? × s n 8 , a length of the first sequence is K=6, n=0, 1, . . . , K?1, A is a non-zero complex number, and j=?{square root over (?1)}. The first signal is a signal modulated by using ?/2 binary phase shift keying (BPSK). The first frequency-domain resource comprises K subcarriers each having a subcarrier number of k, k=u+L*n+delta, L is an integer greater than or equal to 2, delta?{0, 1, . . . , L?1}, u is an integer, and subcarrier numbers of the K subcarriers are numbered in ascending or descending order of frequencies.

Abstract: Embodiments of the present disclosure provide, among other implementations, sequence determining methods. One example method provides a sequence group, and one sequence group number is corresponding to at least two sequences, where one sequence is used for mapping to consecutive subcarriers, and at least one other sequence is used for mapping to equally-spaced subcarriers. In some embodiments of the present disclosure, as high as possible cross-correlation between a sending signal obtained after equally-spaced mapping is performed on a sequence in a sequence group can be determined, and a sending signal obtained after continuous mapping is performed on another sequence in the group.

Abstract: A communication method and apparatus are provided. The method includes: A terminal device receives first information, and sends an SRS based on the first information. The first information indicates an SRS frequency domain resource. The SRS frequency domain resource includes a first frequency domain unit and a second frequency domain unit. The first frequency domain unit is different from the second frequency domain unit. The first frequency domain unit is a frequency domain resource occupied by the SRS on a first frequency hopping subband in a first frequency hopping period. The second frequency domain unit is a frequency domain resource occupied by the SRS on the first frequency hopping subband in a second frequency hopping period. The first frequency hopping subband is one of a plurality of frequency hopping subbands.

Abstract: This application discloses a sequence generating method and apparatus, and relates to the field of communications technologies, to resolve a problem that a PAPR of a DMRS symbol is higher than that of a data symbol. An initialization factor of a first sequence is obtained, where the initialization factor is associated with a first parameter; and the first sequence is generated based on the initialization factor. In addition, the first parameter is a port number, or the first parameter is a code division multiplexing CDM group identity.

Abstract: Embodiments of the present disclosure provide, among other implementations, sequence determining methods. One example method provides a sequence group, and one sequence group number is corresponding to at least two sequences, where one sequence is used for mapping to consecutive subcarriers, and at least one other sequence is used for mapping to equally-spaced subcarriers. In some embodiments of the present disclosure, as high as possible cross-correlation between a sending signal obtained after equally-spaced mapping is performed on a sequence in a sequence group can be determined, and a sending signal obtained after continuous mapping is performed on another sequence in the group.

Abstract: This application provides a sequence-based signal processing method and apparatus. A sequence used for sending a signal on a PUSCH is determined. The sequence is a sequence {xn} including N elements, xn is an element in the sequence {xn}, and the determined sequence {xn} is a sequence satisfying a preset condition. Then, a first signal is generated and sent. By using the determined sequence, when a signal is sent on the PUSCH, relatively good sequence frequency domain flatness can be maintained, and a relatively low PAPR value and a relatively low cross-correlation between sequences can be maintained, thereby satisfying a communications application environment in which a signal is sent on the PUSCH, especially an NR system scenario or an NR similar scenario.

Abstract: Embodiments of the present disclosure provide, among other implementations, sequence determining methods. One example method provides a sequence group, and one sequence group number is corresponding to at least two sequences, where one sequence is used for mapping to consecutive subcarriers, and at least one other sequence is used for mapping to equally-spaced subcarriers. In some embodiments of the present disclosure, as high as possible cross-correlation between a sending signal obtained after equally-spaced mapping is performed on a sequence in a sequence group can be determined, and a sending signal obtained after continuous mapping is performed on another sequence in the group.

Abstract: A signal sending method, a signal detection method, and an apparatus are disclosed. The method includes: generating a sequence of a reference signal, where a cyclic shift value of the sequence is determined based on a first parameter and a second parameter, the first parameter is a value from 0 to Q?1, the second parameter is a value from 0 to Z?1, Z and Q are positive integers, and Z is not equal to Q; and sending the reference signal based on the sequence. According to the method, a difference between cyclic shift values used by any two terminal devices to determine sequences of reference signals can be randomized. Further, interference between reference signals generated by using cyclic shift values obtained by terminal devices according to the method can be reduced, the interference can be randomized, and channel time-domain filtering performance can be improved.

Abstract: This disclosure provides example reference signal mapping methods, apparatuses, and media. One example method includes determining a time-frequency unit based on a size of a first frequency domain unit. A resource group in the time-frequency unit is determined based on a first port index, where the resource group corresponds to one port group, and the port group includes one or more ports. A reference signal corresponding to the first port index is mapped to a first resource group in the time-frequency unit in response to determining that a port corresponding to the first port index belongs to a first port group, or the reference signal corresponding to the first port index is mapped to a second resource group in the time-frequency unit in response to determining that a port corresponding to the first port index belongs to a second port group. The reference signal is sent.

Abstract: Embodiments of the present disclosure provide, among other implementations, sequence determining methods. One example method provides a sequence group, and one sequence group number is corresponding to at least two sequences, where one sequence is used for mapping to consecutive subcarriers, and at least one other sequence is used for mapping to equally-spaced subcarriers. In some embodiments of the present disclosure, as high as possible cross-correlation between a sending signal obtained after equally-spaced mapping is performed on a sequence in a sequence group can be determined, and a sending signal obtained after continuous mapping is performed on another sequence in the group.

Abstract: A communication method and a communications apparatus: A network device sends first signaling, where the first signaling is used to configure K1 channel state information-reference signal CSI-RS resources; a terminal device receives the first signaling, and reports channel state information CSI; and the network device receives the CSI, where the CSI includes a channel quality indicator CQI of a first codeword, a channel measurement part used to calculate the CQI of the first codeword is determined based on channel measurement results of K2 CSI-RS resources.

Abstract: This application provides a sequence-based signal processing method and apparatus. A sequence used for sending a signal on a PUSCH is determined. The sequence is a sequence {xn} including N elements, xn is an element in the sequence {xn}, and the determined sequence {xn} is a sequence satisfying a preset condition. Then, a first signal is generated and sent. By using the determined sequence, when a signal is sent on the PUSCH, relatively good sequence frequency domain flatness can be maintained, and a relatively low PAPR value and a relatively low cross-correlation between sequences can be maintained, thereby satisfying a communications application environment in which a signal is sent on the PUSCH, especially an NR system scenario or an NR similar scenario.

Abstract: This application provides a reference signal transmission method. The method includes: A transmit end determines a time-frequency resource occupied by a reference signal, where the time-frequency resource includes M symbols in time domain and N subcarriers corresponding to each of the M symbols in frequency domain, M is an integer greater than or equal to 2, and N is an integer greater than 1; the transmit end generates a reference signal sequence with a length of M×N, and maps the reference signal sequence to the time-frequency resource for sending; and accordingly, a receive end receives the reference signal on the time-frequency resource.

Abstract: A communication method and apparatus are provided. The method includes: A terminal device determines a first sequence whose length is ?i=0M?1 Ki, and sends the first sequence on M subcarrier groups, where an ith subcarrier group in the M subcarrier groups includes Ki subcarriers on a same symbol, i=0, 1, . . . , M?1, and frequency domain positions of subcarriers included in any two of the M subcarrier groups are different and belong to different symbols; and a sequence carried in each of the M subcarrier groups is a fragment of the first sequence, and fragments carried in any two subcarrier groups are different. According to the method, the terminal device sends the first sequence on the M subcarrier groups, so that interference between different terminal devices is small when channel estimation is performed by combining M symbols. This can effectively improve accuracy of channel estimation.

Abstract: This application relates to a sequence detection method and a device. In embodiments of this application, K candidate frequency domain root sequences may be first filtered based on a differentiation result of received first sequence and differentiation results of candidate frequency domain root sequences, and a candidate frequency domain root sequence to which the first sequence actually corresponds only needs to be determined based on the first sequence and the K candidate frequency domain root sequences. For example, there are U candidate frequency domain root sequences. In this case, a current calculation amount is calculation of U*Cs cross correlation values. In embodiments of this application, a calculation amount is calculation of only L*U+K*Cs, where Cs represents a quantity of sampled time domain cyclic shift values, and L represents a quantity of differentiation granularities.

Abstract: Embodiments of this application disclose example data processing methods and example apparatuses. One example method includes determining, by a first terminal device based on a parameter group, a first sequence including N elements, where the parameter group includes a first parameter, a second parameter, and a cyclic shift value, the first sequence is obtained by performing cyclic shift on a second sequence based on the cyclic shift value, and the second sequence is determined based on the first parameter and the second parameter. The first terminal device can then send a signal to a network device based on the first sequence.

Abstract: A method includes: determining a first sequence based on a first parameter, a second parameter, and a third parameter, where the first sequence is determined based on the third parameter and a second sequence, the second sequence is determined based on the first parameter and the second parameter, the first parameter and the second parameter are root indexes of the second sequence, and the third parameter is a time domain cyclic shift value; and sending a signal based on the first sequence.

Abstract: The present disclosure relates to signal processing methods and apparatus. One example method includes determining a first sequence {x(n)} based on a preset condition, generating a reference signal of a first signal by using the first sequence, and sending the reference signal on a first frequency-domain resource. The preset condition is y n = A · e j × ? × s n 8 , x n = A · e j × ? × s n 8 , a length of the first sequence is K=6, n=0, 1, . . . , K?1, A is a non-zero complex number, and j=?{square root over (?1)}. The first signal is a signal modulated by using ?/2 binary phase shift keying (BPSK). The first frequency-domain resource comprises K subcarriers each having a subcarrier number of k, k=u+L*n+delta, L is an integer greater than or equal to 2, delta?{0, 1, . . . , L?1}, u is an integer, and subcarrier numbers of the K subcarriers are numbered in ascending or descending order of frequencies.