In one embodiment, a method includes accessing a modulated symbol sequence comprising multiple symbols, generating interpolated symbols to be added between any two adjacent symbols based on an unequal phase change method, generating an interpolated symbol sequence based on adding the generated interpolated symbols for any two adjacent symbols into the two adjacent symbols, and transmitting a waveform to a wireless endpoint device, wherein the waveform is generated based on the interpolated symbol sequence.

The present disclosure relates to a 5G communication system or a 6G communication system for supporting higher data rates beyond a 4G communication system such as long term evolution (LTE). The disclosure relates to a method for transmitting channel state information reference signal (CSI-RS). The technical result includes increased performance and flexibility of CSI-RS generation and transmission framework, unified CSI-RS structure, and reduced transmission overhead. A method for transmitting channel state information reference signal is provided. The method includes setting, at a base station, CSI-RS transmission configuration information, including one or more code-division multiplexing (CDM) groups with uniform frequency distribution of resource elements (RE) in each CDM group, transmitting the CSI-RS transmission configuration information from the base station (BS) to user equipment (UE), generating, for each antenna port of the base station, a CSI-RS modulated by orthogonal cover code (OCC) in frequency domain (FD) across resource elements according to discrete Fourier transform (DFT) vector and in time domain (TD) across one or more Orthogonal Frequency-Division Multiplexing (OFDM) symbols according to Walsh-Hadamard (WH) code, and transmitting the CSI-RS from the BS to the UE according to the CSI-RS transmission configuration.

In one embodiment, a method includes accessing a modulated symbol sequence comprising multiple symbols, generating interpolated symbols to be added between any two adjacent symbols based on an unequal phase change method, generating an interpolated symbol sequence based on adding the generated interpolated symbols for any two adjacent symbols into the two adjacent symbols, and transmitting a waveform to a wireless endpoint device, wherein the waveform is generated based on the interpolated symbol sequence.

Embodiments of this application provide a channel information obtaining method and an apparatus. The method includes: obtaining a frequency division duplex FDD downlink channel and a time division duplex TDD channel; determining a first channel expression (I) based on the FDD downlink channel and the TDD channel; performing inverse discrete Fourier transform IDFT on the first channel expression (I) to obtain a second channel expression (II); and sending first information based on the second channel expression (II). According to the foregoing method, channel estimation quality can be improved.

In an operation in a license-exempt band (unlicensed band), the present invention contributes to the provision of a mobile station, a base station, a transmission method and a receiving method which suitably transmit and receive a signal. The mobile station 200 includes: a transmission unit 205 which transmits an uplink signal; and a control unit 201 which, when a first number indicating a first resource amount that can be used in the transmission of the uplink signal includes a third number, which is different from a specific second number, as a prime factor, controls the transmission of a signal of a fourth number that does not include the third number as the prime factor by using a second resource.

In an operation in a license-exempt band (unlicensed band), the present invention contributes to the provision of a mobile station, a base station, a transmission method and a receiving method which suitably transmit and receive a signal. The mobile station 200 includes: a transmission unit 205 which transmits an uplink signal; and a control unit 201 which, when a first number indicating a first resource amount that can be used in the transmission of the uplink signal includes a third number, which is different from a specific second number, as a prime factor, controls the transmission of a signal of a fourth number that does not include the third number as the prime factor by using a second resource.

A method and an apparatus for generating a low power signal, a terminal, and a network-side device, are disclosed in the field of communication technologies. The method for generating a low power signal includes: performing, by a communication device, a target operation on a first sequence to obtain a first signal; and performing, by the communication device, inverse fast Fourier transform IFFT processing on the first signal to obtain a low power signal, where the first sequence is determined based on to-be-transmitted information, and the target operation includes: performing a multiplication operation on the first sequence and a phase adjustment sequence to obtain a second signal, and then multiplying the second signal by a first preprocessing matrix.

Example embodiments relate to methods for disseminating scaling information and applications thereof in very large scale integration (VLSI) implementations of fixed-point fast Fourier transforms (FFTs). One embodiment includes a method for disseminating scaling information in a system. The system includes a linear decomposable transformation process and an inverse process of the linear decomposable transformation process. The inverse process of the linear decomposable transformation process is defined, in time or space, as an inverse linear decomposable transformation process. The linear decomposable transformation process is separated from the inverse linear decomposable transformation process. The linear decomposable transformation process or the inverse linear decomposable transformation process is able to be performed first and is defined as a linear decomposable transformation I. The other remaining process is performed subsequently and is defined as a linear decomposable transformation II. The method for disseminating scaling information is used for a bit width-optimized and energy-saving hardware implementation.

Disclosed is a method pilot-aided channel estimation in Orthogonal Frequency Division Multiplexing (OFDM) systems regardless of the frequency selectivity severity of the channel is proposed.

Disclosed is a multicarrier (MC) connection design via an intelligent exploitation of the multi-user diversity in delay-Doppler domain. Overall, the technology can play a key role as an enabler technology toward 5G and beyond communications systems with applications of NR-Lite, mMTC, eMBB, URLLC and SURLLC.