Huawei Technologies Co., Limited

Mingxin Gong

Bingyu Qu

Kunpeng Liu

Hao Sun

Jianqin Liu

Xianda Liu

Yongxing Zhou

Di Zhang

Leiming Zhang

Xueru Li

Xiaoyan Bi

Yong Liang Liu

Lu Rong

Su Huang

Yi Wei

A signal sending method, a signal detection method, and an apparatus are disclosed. In the signal sending, a sequence of a reference signal is generated first, where the 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. The reference signal is then sent based on the sequence. According to the method, a difference between the cyclic shift values used by any two terminal devices to determine the sequences of reference signals can be randomized. Further, interference between reference signals generated by using the cyclic shift values obtained by terminal devices according to the method disclosed here can be reduced, the interference can be randomized, and the channel time-domain filtering performance can be improved.

Signal sending method, signal detection method, and apparatus

A communication method and apparatus are provided. The method includes: A terminal device determines a first sequence whose length is ΣK, and sends the first sequence on M subcarrier groups, where an isubcarrier group in the M subcarrier groups includes Ksubcarriers 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.

Communication method and apparatus

A communication method and a communications apparatus: A network device sends first signaling, where the first signaling is used to configure Kchannel 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 KCSI-RS resources.

Communication method and communications apparatus

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 {x} including N elements, xis an element in the sequence {x}, and the determined sequence {x} 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.

Sequence-based signal processing method and signal processing apparatus

This application provides example reference signal (RS) transmission methods and example communication apparatuses. One example reference signal transmission method includes receiving, by a terminal device, first information in a first time unit, where the first information triggers the terminal device to transmit a RS. The terminal device can then transmit the RS in a second time unit, where the second time unit is indicated by a time offset indicator n in valid uplink transmission time units starting from the first time unit.

Reference signal transmission method and communication apparatus

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.

Reference signal transmission method and apparatus

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.

Sequence generating and processing method and apparatus

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.

Sequence-based signal transmission method and communication apparatus

Embodiments of the present disclosure provide, among other implementations, sequence determining methods. One example method includes: determining an index v of a sequence group, where the sequence group comprises a sequence {x} and a sequence {y}; generating a second sequence based on the index v of the sequence group, where the second sequence is at least one of a second sequence {f} or a second sequence {g}; and transmitting uplink control information or a reference signal based on the second sequence.

Sequence determining method and apparatus

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.

Data processing method and apparatus

This application provides a sequence-based signal processing method and apparatus. An example signal processing method includes: determining a sequence {x} including N elements, where N is equal to 18 and the sequence {x} satisfies a preset condition; generating a first signal based on the sequence {x}; and sending the first signal.

Sequence-based signal processing method and apparatus

This application relates to a sequence detection method and a device. One example method includes receiving a first sequence carried on a plurality of subcarriers; differentiating the first sequence based on L granularities, to obtain a first differential sequence set comprising L sequences; determining K candidate frequency domain root sequences in the U candidate frequency domain root sequences based on differential sequence cross correlation value sets corresponding to the U candidate frequency domain root sequences; and determining a candidate frequency domain root sequence and a time domain cyclic shift value that correspond to the first sequence, based on the first sequence and the K candidate frequency domain root sequences.

Sequence detection method and device

This disclosure discloses signal configuration methods and apparatuses. In an implementation, a method comprises: generating at least two reference signals of a same type corresponding to at least two antenna ports indicated to a terminal device, wherein the at least two reference signals comprise a first reference signal and a second reference signal, wherein a first sequence of the first reference signal is obtained based on a first initialization factor determined based on an index of a first code division multiplexing (CDM) group, and wherein a second sequence of the second reference signal different from the first sequence is obtained based on a second initialization factor determined based on an index of a second CDM group; and transmitting the at least two reference signals.

Reference signal configuration method and apparatus, and sequence configuration method and apparatus

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 ksubcarrier in an isubcarrier group in N subcarrier groups is x(k), and a sequence {s(k)} related to x(k) is one of enumerated sequences. The enumerated sequences are sequences with relatively good cross-correlation. Therefore, for two subcarrier groups, provided that selected {s(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.

Signal sending method, signal receiving method, and device

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 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 π/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.

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Beijing, China

Mingxin Gong