An apparatus: obtains K downlink channel weight matrices based on K pieces of downlink channel information sent by K UEs, where the downlink channel information is fed back by the UE in response to a preset reference signal sent by the base station, the downlink channel weight matrix is an N.sub.T×rank-dimensional matrix, and rank is a quantity of signal streams received by the UE; obtains K×rank first initial phase difference matrices and K×rank second initial phase difference matrices based on the K downlink channel weight matrices and a first polarization direction and a second polarization direction of transmit channels of the base station; obtains a cell initial phase difference matrix based on the K×rank first initial phase difference matrices and the K×rank second initial phase difference matrices; and implements initial phase correction of the transmit channels based on the cell initial phase difference matrix.

A network device is provided that uses power measurements to measure a relative phase between a received signal from a reference antenna in a plurality of antennas and a received signal from each antenna in the plurality of antennas except the reference antenna. The network device may use a direct phase measurement to measure the phase of other received signals from additional antennas.

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

[00001]$F=\left(\begin{array}{cc}{e}^{j{\theta }_{11}}& e^j\left({\theta }_{11}+\frac{\pi }{4}\right)\\ e^{j{\theta }_{21}}& e^j\left({\theta }_{21}+\pi +\frac{\pi }{4}\right)\end{array}\right)$

on the first baseband signal and the second baseband signal modulated via a modulation scheme of QPSK.

Disclosed is a method for analog beamforming performed by a transmitter (110) of a wireless communication network (100). The transmitter (110) comprises a plurality of antenna branches (114, 115, 116), each antenna branch comprising an antenna element (111, 112, 113). The method comprises, for each antenna branch (114, 115, 116), obtaining a first and a second signal of an analog radio signal, the first and the second signal being split from the analog radio signal and the analog radio signal being the same at each of the antenna branches, and obtaining information indicating a branch-specific phase-shift angle and a branch-specific amplitude determined from information identifying a radiation pattern comprising at least two directions for wireless transmission to at least one receiver (120). The method further comprises phase-shifting the first signal according to a first phase-shift angle and the second signal according to a second phase-shift angle, the first and the second phase-shift angle being selected so that when the first and the second signals are combined, the combined signal has the branch-specific phase-shift angle and the branch-specific amplitude indicated by the obtained information, combining the phase-shifted first and second signals into a combined signal; and transmitting, wirelessly, the combined signal through the antenna element (111, 112, 113).

The disclosed wireless transmitter estimates a client location in space and transmits power in the form of electromagnetic (EM) waves to that location. In response to receiving the power, a client sends a power request signal. In some implementations, the power request signal includes a request that the wireless transmitter transmit more power to the client. In response to the power request signal, the wireless transmitter can modify the power transmitted to the client to increase/decrease the amount of power the client is receiving. For example, the wireless transmitter can modify the emitted EM waves to increase coherent addition or decrease coherent addition at the location of the client to increase the amount of power the client receives. In some implementations, the wireless transmitter modifies the phase distribution of EM waves to increase the amount of power a client receives.

An antenna device includes: antennas; magnetic oscillation element units converting electrical energy to high-frequency power, and a modulator outputting electrical energy input from outside to at least two magnetic oscillation element units, with a time difference to differentiate phases of high-frequency power converted from electrical energy by at least two magnetic oscillation element units. The magnetic oscillation element units respectively include a pair of electrodes, and further include, between the pair of electrodes, a PIN layer, a free layer, and an intermediate layer. A resistance value of an element configured by the PIN, free and intermediate layers changes according to the angle between the magnetization direction of the PIN layer and the magnetization direction of the free layer. The antennas transmit electromagnetic waves to open space outside the magnetic oscillation element units with the supply of high-frequency power.

Base station antennas include an array of radiating elements that includes multiple columns of radiating elements, with each column including multiple radiating elements, a first phase shifter configured to change a phase of a radio frequency (RF) signal of a first frequency band for transmission in a beam forming mode, a second phase shifter configured to change a phase of an RF signal of a second frequency band for transmission in a multi-beam mode, where the RF signal of the second frequency band includes first and second beam signals, a multi-beam device configured to generate an output signal according to the phase shifted first beam signal and the phase shifted second beam signal, and a diplexer configured to receive the phase shifted RF signal of the first frequency band and the output signal of the multi-beam device, and transmit an output signal to the corresponding radiating elements.

A transmission method simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device.

This application discloses a beam training method and apparatus, a terminal device, and a network device. The beam training method in this application includes: measuring at least two reference signals used for beam training and forwarded by an auxiliary device in at least two forwarding modes to obtain measurement information, where the measurement information is used for indicating an optimal forwarding mode of the auxiliary device, and a forwarding mode of the auxiliary device is determined by using a beam direction of a forwarded signal of the auxiliary device and a beam phase of the forwarded signal of the auxiliary device; and reporting the measurement information to a network device.

The present technology relates to a signal processing device, a signal processing method, and a program capable of reducing influence of crosstalk. Provided are: a plurality of comparators; a delay unit adapted to delay output of each of the plurality of comparators; and a subtractor adapted to subtract, from a supplied signal, a signal from the delay unit. The signal processing device processes signals transmitted in N phases and includes (N−1) or more comparators. Each of the plurality of comparators has a different threshold value set and compares a received signal with the threshold value, and in a case where the signal transitions between a plurality of voltage levels, the threshold value is set to a value within adjacent voltage levels. The present technology can be applied to a reception device that receives a signal transmitted in multiple phases and via multiple lines.