A transmission apparatus includes M signal processors that respectively generate modulated signals directed to M reception apparatuses, M being an integer equal to or greater than 2, and an antenna section. Each signal processor modulates a first bit sequence made up of two bits to generate a first modulated signal and a second modulated signal, and modulates a second bit sequence made up of other two bits to generate a third modulated signal and a fourth modulated signal, in a case of transmitting multiple streams to a corresponding one of the M reception apparatuses. The antenna section includes a first antenna that transmits the first modulated signal and the third modulated signal and a second antenna that transmits the second modulated signal and the fourth modulated signal. At least either the signals transmitted from the first antenna or the signals transmitted from the second antenna are phase-changed signals.

An information transmission method, a communications device, and a network device are provided. The information transmission method includes: receiving first downlink control information, wherein the first downlink control information comprises scheduling information used to transmit first data, and the format of the first downlink control information is DCI format 6-0B, the first downlink control information comprises indication information, and the indication information is used to indicate that the first data transmitted by the communications device is a first message 3 or a second message 3; and transmitting the first data based on the scheduling information and the indication information. The method and apparatus may be applied to a communications system such as a V2X communications system, an LTE-V communications system, a V2V communications system, an internet of vehicles communications system, an MTC communications system, an IoT communications system, an LTE-M communications system, or an M2M communications system.

Transmission quality is improved in an environment in which direct waves dominate in a transmission method for transmitting a plurality of modulated signals from a plurality of antennas at the same time. All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ. A modulated signal with such data symbols arranged therein is transmitted.

Techniques for operating a wireless network in a plurality of radio operating environments are disclosed. In some embodiments, an apparatus receives a first parameter value set that is selected from a group of multiple parameter value sets, wherein the first parameter value set is appropriate for a first target radio operating environment that corresponds to one or more of: a first level of mobility of user devices or a first range of wireless transmission. In some embodiments, the apparatus is reconfigured to receive wireless broadcast transmissions from a second broadcast transmitter using a second parameter value set that is appropriate for a second target radio operating environment. The first and second broadcast transmitters may be the same or different. The parameter value sets may include a first parameter based upon which the apparatus is configured to determine subcarrier spacing and a second parameter that indicates a cyclic prefix size.

Demodulation of 5G and 6G messages involves complex demodulation reference signals that occupy valuable resource grid area. Disclosed are numerous configurations of short-form demodulation reference types that provide sufficient modulation information to enable a receiver to determine all of the predetermined modulation levels of the modulation scheme, while consuming minimal resources. Selection of the appropriate modulation scheme and demodulation reference type generally depends on many competing factors. Therefore, an AI model may be required. The AI model may be trained on network data to recommend when a different modulation scheme would be beneficial, as the network default or to serve a particular user device. The AI model may be configured to select between the disclosed short-form demodulation references and prior-art demodulation reference signals, thereby optimizing the subsequent network performance as well as individual user satisfaction, while minimizing costs, bandwidth, power, and especially avoiding interference with neighboring cells.

A modulation scheme conversion device includes: a backscattering tag to which a tag signal is provided; and a tag signal forming unit for forming a tag signal. The modulation scheme conversion device multiplies a radio signal, which has been modulated in a first modulation scheme, and a tag signal, and reconfigures the multiplied signal by using a second modulation scheme, so as to backscatter the reconfigured signal, wherein the reconfiguration is performed in a physical (PHY) layer.

Infrastructure equipment forming part of a wireless communications network configured to receive data from a communications device via a communications channel between the infrastructure equipment and the communications device. The infrastructure equipment comprises circuitry configured to receive, from the communications device, a request for a resource allocation, to receive one or more reference symbols from the communications device, to estimate based on the received reference symbols, for each of a plurality of resource units, RUs, of the communications channel, a signal to interference and noise ratio, SINR, sequence of the communications channel, and to perform a first transform followed by a second transform on the SINR sequence to produce a cepstrum of the SINR sequence, the second transform being an inverse of the first transform, and to encode and to transmit the cepstrum to the communications device.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a control message from a base station indicating a configuration of an uplink waveform for full-duplex communications at the UE. The UE may receive an additional control message scheduling a set of uplink resources and a set of downlink resources for the full-duplex communications. The set of uplink resources and the set of downlink resources may at least partially overlap in a time-domain. A frequency-domain gap between the set of uplink resources and the set of downlink resources may be based on the first uplink waveform and a first downlink waveform used by the base station. The UE may communicate with the base station on the set of uplink resources and the set of downlink resources in accordance with the frequency-domain gap.

A modulation module includes a first modulation circuit that, upon receiving input of first setting information including first information designating a modulation mode, outputs a prescribed auxiliary signal as a first output signal, but upon receiving input of second setting information including second information designating a different modulation mode from the first information, outputs a first modulation signal generated by subjecting an input signal to modulation processing based on the second setting information as the first output signal. The modulation module further includes a second modulation circuit that is configured to output, as a second output signal, a signal generated by combining a second modulation signal generated by modulation processing and the first output signal.

Provided are a data transmission method and a network device, the method including: configuring a multiple access mode of uplink transmission for a terminal device; sending the multiple access mode of uplink transmission to the terminal device. The multiple access mode of uplink transmission is used for the terminal device to determine a multiplexing mode of a first uplink signal and a second uplink signal on a target time domain resource, wherein the first uplink signal and the second uplink signal are signals which the terminal device is scheduled to transmit on the target time domain resource simultaneously.