Methods, systems, and devices for wireless communications are described. The methods include a base station mapping transmitter antennas to one of a set of multiple antenna groups based on a power amplifier response of one or more transmitter antennas, determining a power amplifier model for one or more antenna groups based on the power amplifier response of the one or more transmitter antennas, and transmitting an indication of the power amplifier model for one or more antenna groups to a UE. The methods include the UE determining a power amplifier model for a transmitter antenna of the set of transmitter antennas based on the indication of the power amplifier model and communicating with the base station based on the power amplifier model for the transmitter antenna.

An electronic device configured to apply, to a first power amplifier (PA) input, one or more updated memory digital pre-distorter (mDPD) coefficient values is provided. The electronic device includes a processor; and a memory including a non-transitory computer readable storage medium storing instructions that, when executed, cause the processor to preload, from values stored in the memory of the electronic device, one or more mDPD coefficient values; transmit a training signal sequence while using the preloaded one or more mDPD coefficient values; receive the training signal sequence; update the one or more mDPD coefficient values based on the transmitted training signal sequence, the received training signal sequence, and the preloaded one or more mDPD coefficient values; and apply the updated one or more mDPD coefficient values to distort the first PA input.

The present power amplifier linearizing module linearizes operation of a power amplifier and operates in parametrizing mode and operation mode. A processing module executes a feed-forward transfer functions set, which includes at least: a transfer function P and a summing function. The transfer function P derives a change signal ΔV.sub.a relative to the control signal component received and the summing function summing the incremental change signal ΔV.sub.a to an input signal to generate an adjusted input signal. A transfer function G uses the adjusted input signal to generate an RF signal representative of the amplifying of the adjusted input signal based on the control signal component. The processing module determines a linearizing control signal component based on the generated RF signal representative.

An integrated circuit operable to measure an impedance presented to a transmitter path of the integrated circuit and a method thereof are provided. The integrated circuit includes a directional coupler that has an input port, a through port, a coupled port, and an isolation port. The integrated circuit also includes a power amplifier coupled to the input port of the directional coupler, a power detector configured to measure output levels from the coupled port and the isolation port of the directional coupler, a reference signal generator coupled to the isolation port of the directional coupler, and a vector modulator configured to adjust a phase of a signal generated from the power amplifier.

The present disclosure provides an amplitude offset calibration method. The method includes: obtaining at least two test feedback signals, where the test feedback signals are analog signals obtained by a transmitter in a test mode according to a test signal, at least two test signals in one-to-one correspondence to the at least two test feedback signals are digital signals pre-generated by the transmitter, and amplitudes of the at least two test signals are different; obtaining at least two corresponding baseband signals according to the at least two test feedback signals, where the baseband signals are a digital signal, and the baseband signals are in one-to-one correspondence to the test feedback signals; and determining an amplitude offset value according to the at least two test signals and the at least two baseband signals.

Methods, systems, and devices for wireless communications are described. For example, a transmitting wireless device, such as a user equipment or a base station, may apply a first set of digital pre-distortion (DPD) coefficients to a plurality of antenna elements to form a first transmit beam. The wireless device may determine to switch from using the first transmit beam to using a second transmit beam that is different from the first transmit beam and may apply a second set of DPD coefficients to the plurality of antenna elements to form the second transmit beam, where the second set of DPD coefficients is different from the first set of DPD coefficients. The wireless device may transmit signaling using the second transmit beam based at least in part on applying the second set of DPD coefficients.

An analog pre-distortion processing circuit and a signal processing device, the analog pre-distortion processing circuit comprises a narrowband spread spectrum module, an analog pre-distortion module and a filtering module. The narrowband spread spectrum module is used for spreading an input narrowband radio frequency signal into a broadband radio frequency signal. The bandwidth of the broadband radio frequency signal is a preset bandwidth. The analog pre-distortion module is used for carrying out analog pre-distortion linearization processing on the broadband radio frequency signal to obtain a linearized broadband radio frequency signal; the preset bandwidth is located in the optimal cancellation bandwidth of the analog pre-distortion module. The filtering module is used for carrying out signal filtering on the linearized broadband radio frequency signal to obtain a linearized narrowband radio frequency signal.

Provided is a distortion compensation device performing distortion compensation on a signal to be amplified by an amplifier, of which an internal state affecting a distortion characteristic varies, using a distortion compensation model, wherein the distortion compensation model includes a plurality of calculation models having respective distortion compensation characteristic for the amplifier in different internal states, and a combiner combining the plurality of calculation models at a combination ratio corresponding to the internal state that varies.

Disclosed is a system for monitoring the peak power of a telecommunication signal to be transmitted for RF power amplification of the telecommunication signal to be transmitted, including a digital processing device, a digital to RF converter and a dc-dc converter, wherein the output of the dc-dc converter can take a discrete voltage value from N discrete voltage values, N being an integer equal to or greater than 2, the digital processing device including a processing path including an envelope tracking control logic adapted to create a continuous envelope tracking control signal. The processing path further includes logic for driving the dc-dc converter including a peak value calculating device and a power supply voltage selecting device.

Examples described herein include methods, devices, and systems which may compensate input data for nonlinear power amplifier noise to generate compensated input data. In compensating the noise, during an uplink transmission time interval (TTI), a switch path is activated to provide amplified input data to a receiver stage including a recurrent neural network (RNN). The RNN may calculate an error representative of the noise based partly on the input signal to be transmitted and a feedback signal to generate filter coefficient data associated with the power amplifier noise. The feedback signal is provided, after processing through the receiver, to the RNN. During an uplink TTI, the amplified input data may also be transmitted as the RF wireless transmission via an RF antenna. During a downlink TTI, the switch path may be deactivated and the receiver stage may receive an additional RF wireless transmission to be processed in the receiver stage.