A signal transmission method and apparatus are provided, to resolve a problem that because a PAPR of a signal is comparatively high, a waveform distortion of the signal is comparatively serious after power amplification is performed on the signal by using a PA. The method includes: separately performing phase rotation on M pieces of modulated data to obtain M pieces of phase-rotated data, where a phase factor for performing phase rotation on the M pieces of modulated data is determined based on M. The method further includes: determining time domain data based on the M pieces of phase-rotated data, and sending the time domain data to a receive end.

This disclosure relates to methods and devices for receiving data and controlling the receiving of the data. An exemplary method may be performed by a user equipment and comprise: receiving Downlink Control Information (DCI), the DCI comprising a bandwidth update indicator field and a transmission bandwidth indicator field, the transmission bandwidth indicator field comprising transmission bandwidth information indicative of a frequency domain location; determining that the bandwidth update indicator field includes an instruction for updating a transmission bandwidth; in response to the determining that the bandwidth update indicator field includes the instruction for updating the transmission bandwidth, updating the transmission bandwidth based on the transmission bandwidth information; and receiving data using the updated transmission bandwidth.

The present invention relates to the technical field of communications, and specifically relates to an uplink transmission method, terminal, and base station, used for providing a pilot frequency transmission solution for a terminal supporting an CP-OFDM waveform, and comprising: a terminal determines a frequency domain starting position of a pilot frequency, the terminal being a terminal using CP-OFDM to perform uplink transmission; on the basis of a comb-type interval and the determined frequency domain starting position, mapping the pilot frequency onto a transmission pilot frequency symbol; and sending the pilot frequency mapped onto the symbol to a base station.

The present disclosure provides a terminal and a transmission method, the terminal including: a processing unit configured to perform Orthogonal Frequency Division Multiplexing (OFDM) processing on a first symbol sequence to obtain a second symbol sequence, and perform Faster than Nyquist (FTN) modulation on the second symbol sequence in time domain to obtain a third symbol sequence; and a transmitting unit configured to transmit the FTN-modulated third symbol sequence.

Methods and apparatuses for providing control signals for a transmission from a transmitting device to a receiving device using a mobile communication connection that comprises a voice channel are described. The control signals are used for controlling the operation of the receiving device.

Provided are a data sending method and apparatus, a data receiving method and apparatus, a data transmission system, and a storage medium. The data sending method includes: a first data stream is acquired, where the first data stream includes multiple coded data symbols; an N-dimensional orthogonal transformation is performed on the first data stream to obtain an orthogonally transformed first data stream, where N≥2; a modulation processing is performed on the orthogonally transformed first data stream to obtain a first radio frequency signal; and the first radio frequency signal is sent.

System and methods for shaped single carrier orthogonal frequency division multiplexing with low peak to average power ratio are provided. The system receives an input signal and modulates the input signal to form Dirichlet kernels in a time domain to generate an offset Dirichlet kernel output time array where each Dirichlet kernel has a main lobe and a plurality of side lobes. Modulating the input signal suppresses a peak to average power ratio of the offset Dirichlet kernel output time array by reducing the plurality of side lobes of each Dirichlet kernel and respective amplitudes of the side lobes.

In one embodiment, a method includes sending SRS received from a plurality of UEs associated with the base station to a DU associated with the base station, receiving information regarding a subset of the plurality of UEs selected for downlink data transmissions for an RBG, multi-user data to be transmitted to UEs in the subset, and identities of selected beams among a plurality of pre-determined beams to be associated with the UEs in the subset from the DU, where each of the plurality of pre-determined beams corresponds to a DFT vector, computing a precoding matrix for the RBG based on IDFT vectors corresponding to the selected beams, preparing pre-coded multi-user data by applying the precoding matrix to the multi-user data, and transmitting the pre-coded multi-user data to the UEs in the subset for the RBG using MIMO technologies.

A receiver, e.g. an IoT device, receives and processes a radio signal. The radio signal has at least a first frequency band and a second frequency band. The first frequency band includes a first signal, the second frequency band includes a second signal, and each of the first signal and the second signal includes a plurality of frames, each frame having a plurality of subframes (M-subframe). One or more of the subframes of the first signal include connecting information allowing a receiver to establish a connection with a wireless communication system. All of the subframes of the second signal are free of any connecting information. The receiver establishes the connection with the wireless communication system using the connecting information, and, after having established the connection with the wireless communication system and responsive to band information indicating the second frequency band, operate in the second frequency band.

Provided is a positioning reference signal transmission method performed by a transmitter, the method including acquiring a first time domain sample data in which a cyclic prefix (CP) insertion is completed based on a zero input; acquiring a second time domain sample data corresponding to a waveform of a signal that continues during a plurality of symbols; synthesizing the first time domain sample data and the second time domain sample data; and transmitting a positioning reference signal based on a result of synthesizing the first time domain sample data and the second time domain sample data.