This application provides a reference signal generation method, a reference signal detection method, and a communications apparatus, so that a terminal device or a network device can generate a reference signal by using a pseudo-random sequence initial factor c.sub.init provided in embodiments of this application. Compared with a solution in the current technology, the generation manner can support a relatively large quantity of reference signal sequences, to better meet requirements of a plurality of 5G scenarios. The method may include: obtaining a reference signal sequence based on a pseudo-random sequence initial factor c.sub.init; and mapping the sequence to one or more OFDM symbols, where the pseudo-random sequence initial factor c.sub.init is related to a parameter d, d=max(log.sub.2(n.sub.ID,max+1)−10,0) or d=max(log.sub.2(n.sub.ID,max+1)−12,0), max represents that a larger value is selected from two values, and n.sub.ID,max represents a maximum value of a reference signal sequence ID.

A transmitter in a wireless communication network encodes data bits of a first layer to produce a set of coded symbols; spreads the coded symbols using discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM); and modulates the spread symbols onto a set of OFDM subcarrier frequencies to produce a discrete-time OFDM signal. Spreading is configured to map the coded symbols to a first sparse DFT-s-OFDM code space in a DFT-s-OFDM symbol, wherein the first sparse DFT-s-OFDM code space is different from a second sparse DFT-s-OFDM code space in the DFT-s-OFDM symbol, the second sparse DFT-s-OFDM code space being employed by a second layer.

A MIMO communication method for performing MIMO communication between a base station including a plurality of antennas, and a plurality of terminals accommodated in the base station. The method includes, in the base station, dividing the plurality of terminals into a first and a second group, and assigning orthogonal codes with each other to the respective groups, spreading transmission data to the plurality of terminals with the assigned codes, multiplying data obtained by the spreading by a predetermined pre-coding matrix, obtaining a channel matrix representing channels between the plurality of antennas and the plurality of terminals, multiplying data obtained by the multiplying by the pre-coding matrix by a complex conjugate matrix of the channel matrix, and transmitting data obtained by the multiplying by the complex conjugate matrix from the plurality of antennas.

Embodiments of the present invention provide a direct current component subcarrier configuration method and apparatus. The base station includes: a processing module, configured to: determine a first DC subcarrier on a carrier, where the first DC subcarrier is located, in a frequency domain, at a non-center frequency location on the carrier, and a center frequency of the first DC subcarrier is an integer multiple of 100 KHz; and determine a second DC subcarrier on the carrier, where the second DC subcarrier is located, in the frequency domain, at a center frequency location at which the base station transmits the carrier, and the first DC subcarrier does not overlap the second DC subcarrier.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may apply one or more spreading sequences to a set of modulation symbols of a data set to generate spread modulation symbols; apply a scrambling sequence to the spread modulation symbols to generate a set of scrambled symbols; and transmit a waveform based at least in part on the set of scrambled symbols. Numerous other aspects are provided.

The present application provide a reference signal transmitting method, including: notifying a User Equipment (UE) of a grid index and a reference signal port index of the UE, wherein a coverage area of a base station is divided into grids, the grid index of the UE is an index of a based on the grid index; and transmitting the reference signal on corresponding time-frequency resources based on the grid index and the reference signal port index. The present application further provides a corresponding reference signal transapparatus, and a scheduling method and appartus. According to the technical solution provided by the present application, it is possible to increase the number of ports that the system can support at the same time with low reference resource overhead, and to ensure that the interface of the reference signal is controllable and eliminable, thereby ensuring transmission realiability.

In a method and apparatus for transmitting or receiving a signal in a wireless communication system according to an embodiment of the present invention, a WUS is received on the basis of an antenna port assumption structure corresponding to a subgroup to which the apparatus belongs.

[Object] Provided is a mechanism for enhancing resistance against an interference that possibly occur due to non-orthogonality of a resource in a communication system holding communication with a mixture of a plurality of communication parameter sets. [Solving Means] A transmitting apparatus holding communication using a plurality of communication parameter sets in a unit resource, and including a processing section that transmits a data signal and a reference signal generated using the parameter sets different between the data signal and the reference signal to a receiving apparatus.

Methods, systems, and devices for wireless communications are described. Pre-discrete Fourier transform (DFT) time-domain spreading codes may be applied for UE multiplexing for uplink control information (e.g., over shared resources of an uplink slot). For example, a moderate number of UEs may be multiplexed within the same slot by having each UE spread modulation symbols before DFT-spreading by different spreading code. For orthogonality across UEs, the pre-DFT spreading codes may be selected as orthogonal cover codes (OCCs). The spreading sequences can be generated from a set of any orthogonal sequences or generated from unitary matrices. In some cases, orthogonality in the time domain may be kept as well as a frequency division multiplexed (FDM) structure in the frequency domain. For such property, a Fourier basis OCC design may be used. In some other examples, a Hadamard matrix based OCC design may be used.

Embodiments of the present disclosure relate to methods, devices and computer readable media for Reference Signal (RS) transmission. A method for communication comprises determining one or more RS ports for RS transmission, the one or more RS ports being included in one or more RS groups. The method further comprises determining a plurality of parameters for generating a RS sequence specific to a RS group in the one or more RS groups, the RS group including at least one of the one or more RS ports. The method further comprises generating the RS sequence based on the plurality of parameters. In addition, the method further comprises transmitting the generated RS sequence over the at least one of the one or more RS ports. The embodiments of the present disclosure can solve the PAPR issue caused by mapping a same RS sequence to antenna ports across RS port groups.