Abstract: A reference signal sending method and a transmitter are provided. The method includes: determining a time-frequency resource pattern of a target reference signal used for interference measurement, where the time-frequency resource pattern is used to indicate a time domain location and a frequency domain location of the target reference signal; and sending the target reference signal based on the time-frequency resource pattern.

Abstract: A DMRS port information indication method includes receiving, by a terminal, target indication information; where the target indication information is used to indicate a target value item of X value items in a target indication table, the target value item corresponds to information of a DMRS port used by the terminal, the DMRS port used by the terminal includes a first-type port and/or a second-type port, and X is a positive integer; and sending, by the terminal, data or receiving data according to the information of the DMRS port.

Abstract: A demodulation reference signal transmission method includes receiving, by a first communication device, a target demodulation reference signal from a second communication device; and performing, by the first communication device, channel estimation on the target demodulation reference signal, where the target demodulation reference signal is generated based on N frequency division cover code sequences, the N frequency division cover code sequences are generated based on a subsequence with a target length as a basic unit and according to a resource mapping rule corresponding to the subsequence with the target length, the frequency division cover code sequence is used for code division multiplexing of a port of the target demodulation reference signal, and N is a positive integer.

Abstract: A demodulation reference signal information determining method, and a terminal are provided. The demodulation reference signal information determining method includes: receiving first Demodulation Reference Signal (DMRS) indication information sent by a network side device. The method further includes determining DMRS information of a target DMRS based on the first DMRS indication information. Ports, belonging to a same Code Division Multiplexing (CDM) group, in the target DMRS are mapped based on a length-4 Frequency Division-Orthogonal Cover Code (FD-OCC) sequence. The DMRS information includes at least one of the following: the quantity of target CDM groups, port information of the target DMRS, or the quantity of front-load symbols. The target CDM group is a CDM group, not occupied by data, in a CDM group corresponding to the target DMRS.

Abstract: A port mapping method for sounding reference signals includes in a case that a number of ports for a first SRS is 6 or 8, determining, by a terminal, a CS corresponding to each port for the first SRS and/or a comb position mapped by the each port for the first SRS; where a comb structure size of the first SRS is N, and N is 2, 4, 6, or 8.

Abstract: ADMRS generation method includes mapping, by a communication device, an FD-OCC sequence with a length of L to L subcarriers. The L subcarriers are specific subcarriers corresponding to N DMRS ports, the FD-OCC sequence is used for CDM of the N DMRS ports, the N DMRS ports belong to one CDM group, L and N are positive integers, and L is greater than 2.

Abstract: This application discloses an SRS port mapping method and apparatus, and a terminal. The method includes: mapping, by a terminal, M port groups to N OFDM symbols, where M and N are both integers greater than or equal to 1, M is greater than or equal to N, ports of a target SRS include ports of one or more SRS resources, and the ports of the SRS resources are formed by the M port groups.

Abstract: A channel information reporting method, a terminal scheduling method, and a terminal are provided. The channel information reporting method includes: obtaining, by the terminal, to-be-reported target time domain information based on a first report configuration. The target time domain information is used to indicate channel change characteristics at a plurality of occasions. The channel information reporting method further includes reporting, by the terminal, a first report on a target resource. The first report includes the target time domain information, and the target resource is a reporting resource indicated by the first report configuration.

Abstract: A channel state information CSI measurement method, a terminal, and a network-side device. The CSI measurement method of embodiments of this application includes: sending, by the network-side device, CSI measurement configuration information to the terminal, where the CSI measurement configuration information is used for configuring a target CSI measurement resource associated with measurement of target CSI information; and receiving, by the network-side device, the target CSI information from the terminal. The target CSI information includes at least one of the following: Doppler shift, Doppler spread, Doppler spectrum, time domain channel correlation matrix, delay spread, average delay, delay spectrum, and frequency domain channel correlation matrix.

Abstract: A signal transmission method and apparatus, a device, and a system are provided. The signal transmission method includes: sending first signaling to a receive end device, where the first signaling is used to indicate configuration information of a first signal; and the configuration information includes at least one of the following: first information, a signal waveform, a target measurement quantity, or signal sequence information, where the first information is used to indicate a signal type of the first signal, or indicate whether the receive end device detects communication information of the first signal; and the target measurement quantity includes a measurement quantity to be measured or fed back by the receive end device.

Abstract: A scheduling method and apparatus, a device, and a readable storage medium are provided. The scheduling method in an embodiment of this application includes: receiving, by a terminal, first scheduling information and/or second scheduling information; where the first scheduling information is used to schedule a terminal in a case that the terminal reports transmission scheme switching capability information, the transmission scheme switching referring to switching between an SFN transmission scheme and other transmission schemes; and the second scheduling information is used to schedule the terminal in a case that the network-side device configures an SFN transmission scheme.

Abstract: This application provides a transmission mode determining method and apparatus, and a communications device, and pertains to the field of communications. The method includes: determining a single frequency network transmission mode in a target indication manner, where the target indication manner includes one of the following manners: indication by RRC signaling, indication by TCI state, a manner with a configured or indicated target parameter satisfying a predetermined parameter requirement, and indication of a PDCCH using the SFN transmission mode.

Abstract: A reference signal sending method and a transmitter are provided. The method includes: determining a time-frequency resource pattern of a target reference signal used for interference measurement, where the time-frequency resource pattern is used to indicate a time domain location and a frequency domain location of the target reference signal; and sending the target reference signal based on the time-frequency resource pattern.