A transmission method for transmitting a first modulated signal and a second modulated signal in the same frequency at the same time. Each signal has been modulated according to a different modulation sheme. The transmission method applies precoding on both signals using a fixed precoding matrix, applies different power change to each signal, and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device.

A transmission method includes mapping processing, phase change processing, and transmission processing. In the mapping processing, a plurality of first modulation signals and a plurality of second modulation signals are generated using a first mapping scheme, and a plurality of third modulation signals and a plurality of fourth modulation signals are generated using a second mapping scheme. In the phase change processing, a phase change is performed on the plurality of second modulation signals and the plurality of fourth modulation signals using all N kinds of phases. In the transmission processing, the first modulation signals and the second modulation signals are respectively transmitted at a same frequency and a same time from different antennas, and the third modulation signals and the fourth modulation signals are respectively transmitted at a same frequency and a same time from the different antennas.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, downlink control information (DCI) associated with transmission configuration information, where the transmission configuration information includes a plurality of indicators of respective reference signals. The UE may communicate, with the base station, based at least in part on the transmission configuration information. The DCI may include a field associated with a transmission configuration indicator (TCI) state that includes the plurality of indicators. As an alternative, the DCI may include at least a first field associated with a first TCI state that includes a first indicator of the plurality of indicators and a second field associated with a second TCI state that includes a second indicator of the plurality of indicators. Numerous other aspects are described.

A method and system analog beamforming for a single-connected antenna array is herein disclosed. A method includes estimating analog channels on a per-antenna basis, calculating explicitly an analog beamforming matrix based on the estimated analog channels, and performing analog beamforming based on the calculated analog beamforming matrix.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device may identify, based at least in part on a scaling factor, one or more phase weights associated with a transmit beam of the wireless communication device. The scaling factor is associated with a frequency in a frequency band associated with the wireless communication device. The wireless communication device may generate, based at least in part on the one or more phase weights, the transmit beam. The wireless communication device may transmit a wireless communication using the transmit beam. Numerous other aspects are described.

An analog beamformer used for array antenna and an operating method thereof are provided. The analog beamformer used for array antenna includes an intermediate-frequency amplifying circuit, multiple local oscillators, multiple mixers, multiple radio-frequency amplifying circuits, and a frequency locking circuit. The analog beamformer uses a master-oscillator and multiple slave-oscillators which embed a resonant network of frequency-and-phase-locking. The intermediate-frequency amplifying circuit receives a baseband signal to provide an intermediate-frequency signal. Power supplies or grounding ports of different local oscillators are connected together to provide multiple local-oscillating signals with consistent frequency but different phases. The mixers individually receive the intermediate-frequency signal and one of the local-oscillating signals to provide multiple mixed signals. The radio-frequency amplifying circuits receive the mixed signals to provide multiple radio-frequency signals with consistent frequency but different phases to each antenna. The frequency locking circuit only locks a frequency of one of the local-oscillating signals.

A configuration for beam management procedure using OAM beams. The apparatus transmits, to a receiver, a positive phase order OAM transmission on at least one beam. The apparatus transmits, to the receiver, a negative phase order OAM transmission on the at least one beam. The apparatus receives, from the receiver, a report indicating a relative phase difference between the positive phase order OAM transmission and the negative phase order OAM transmission.

A transmission method for transmitting a first modulated signal and a second modulated signal in the same frequency at the same time. Each signal has been modulated according to a different modulation scheme. The transmission method applies precoding on both signals using a fixed precoding matrix, applies different power change to each signal, and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device.

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.

A transmission device includes: a weighting synthesizer that generates a first precoded signal and a second precoded signal from a first baseband signal and a second baseband signal, respectively; a phase changer that applies a phase change of i×Δλ to the second precoded signal; an inserter that inserts a pilot signal into the second precoded signal applied with the phase change; and a phase changer that applies a phase change to the second precoded signal applied with the phase change and inserted with the pilot signal. The weighting synthesizer performs, in the precoding process, a calculation that uses $F=\left(\begin{array}{cc}{e}^{j{\theta }_{11}}& e^{j\left({\theta }_{11}+\frac{\pi }{4}\right)}\\ e^{j{\theta }_{21}}& e^{j\left({\theta }_{21}+\pi +\frac{\pi }{4}\right)}\end{array}\right)$
on the first baseband signal and the second baseband signal modulated via a modulation scheme of QPSK.