10results about "One amplifier with multiple channels" patented technology

Method and device(s) for supporting performance of machine learning based CFR and DPD on multiple digital input signals relating to different frequency bands, respectively, in order to signal condition said signals before power amplification and subsequent transmission in said frequency bands by a wireless communication network. The device(s) obtain said multiple digital input signals as complex valued signals. The device(s) perform feature construction that takes said multiple digital input signals as input and provides constructed feature signals according to predefined constructed feature types as output. Said predefined constructed feature types relate to at least the following per complex valued sample of the obtained complex valued multiple digital input signals the real part of the sample, the imaginary part of the sample and at least one of the absolute value of the sample and the phase of the sample.

This application relates to a predistortion circuit for a wireless transmitter and a method for generating a predistorted baseband signal. Specifically, the invention discloses a predistortion circuit for a wireless transmitter, comprising a signal input configured to receive a baseband signal. Furthermore, the predistortion circuit includes a predistorter configured to generate a predistorted baseband signal using the baseband signal and a selection of a first predistorter configuration and a second predistorter configuration.

Provided a similar combination and cancellation power amplifier circuit including a combiner main circuit implemented by connecting an output of a main signal and branch similar input combination and cancellation parallel circuit or main signal and branch similar input combination and cancellation series circuit to a main power amplifier circuit. An output of a main signal and branch similar input combination combiner circuit in the main signal and branch similar input combination and cancellation parallel circuit or main signal and branch similar input combination and cancellation series circuit is connected to an input of the main power amplifier circuit, to implement a branch similar input combination and main signal combiner main circuit. In the present disclosure, a linear ACPR value of a Class C-like main power signal with extended linear gain of a main power signal of the branch similar input combination and main signal combiner main circuit is increased to above 30-35 dBc, and at the same time, a linear ACPR value of a Class C-like main power signal with extended linear gain of a main power signal of a branch similar input combination and input cancellation combiner main circuit is also increased to above 40-45 dBC.

A predistortion circuit for a wireless transmitter includes a signal input configured to receive a baseband signal. Further, the predistortion circuit includes a predistorter configured to generate a predistorted baseband signal using the baseband signal and a select of one of a first predistorter configuration and a second predistorter configuration.

A transmitter having a transmitter signal processor (TSP) is provided for processing a plurality of signals for transmission to produce an output signal of constant envelope. The TSP has a sum input c

A transmitter signal processor (TSP) for use where multiple independent signals are to be combined, amplified and transmitted whilst maintaining a substantially constant envelope, the processor comprising a feedback network, whereby an error signal between a sum of the signals and an output of a constant envelope process within the TSP is computed, and, for each input signal this error signal correlated with the input signal to model the effect of the error in a receiver, and to produce a feedback signal by multiplying each error signal by its corresponding input signal, and summing the result for each such input signal, and then subtracting the feedback signal from the sum input. The constant envelope process may be all-digital, such as a normalisation process, and / or may comprise a part of the analogue transmit chain, such as amplifiers, frequency convertors or filters.

Provided a similar combination and cancellation power amplifier circuit including a combiner main circuit implemented by connecting an output of a main signal and branch similar input combination and cancellation parallel circuit or main signal and branch similar input combination and cancellation series circuit to a main power amplifier circuit. An output of a main signal and branch similar input combination combiner circuit in the main signal and branch similar input combination and cancellation parallel circuit or main signal and branch similar input combination and cancellation series circuit is connected to an input of the main power amplifier circuit, to implement a branch similar input combination and main signal combiner main circuit.

A transmitter signal processor (TSP) for use in combining, amplified, and transmitting multiple independent signals while maintaining an approximately constant envelope, the processor comprising a feedback network whereby an error signal between the sum of the signals and the output of a constant envelope process in the TSP is calculated, and for each input signal, this error signal is correlated with the input signal to model the effect of errors in the receiver, and a feedback signal is generated by multiplying each error signal by its corresponding input signal, summing the result for each such input signal, and then subtracting the feedback signal from the sum input. The constant envelope process may be all digital, such as a normalization process, and / or may comprise part of an analog transmit chain, such as an amplifier, frequency converter, or filter.

Provided a similar combination and cancellation power amplifier circuit including a combiner main circuit implemented by connecting an output of a main signal and branch similar input combination and cancellation parallel circuit or main signal and branch similar input combination and cancellation series circuit to a main power amplifier circuit. An output of a main signal and branch similar input combination combiner circuit in the main signal and branch similar input combination and cancellation parallel circuit or main signal and branch similar input combination and cancellation series circuit is connected to an input of the main power amplifier circuit, to implement a branch similar input combination and main signal combiner main circuit. In the present disclosure, a linear ACPR value of a Class C-like main power signal with extended linear gain of a main power signal of the branch similar input combination and main signal combiner main circuit is increased to above 30-35 dBc, and at the same time, a linear ACPR value of a Class C-like main power signal with extended linear gain of a main power signal of a branch similar input combination and input cancellation combiner main circuit is also increased to above 40-45 dBC.

Provided in the present disclosure is a power amplification circuit with similar combining and cancellation. An output end of a parallel or series circuit for main-signal-branch similar input combining and input cancellation is connected to a main power amplification circuit, so as to form a power amplification circuit with similar combining and cancellation that has the function of a combined main circuit with branch similar input combining and input cancellation; and an output end of a combined-connection circuit for main-signal and branch similar input combining in the parallel or series circuit for main-signal-branch similar input combining and input cancellation is connected to an input end of the main power amplification circuit, so as to form a combined main circuit for branch similar input combining and a main signal. The present disclosure improves the linear ACPR value of a Class-C-like main power signal to 30-35 dBc or more after gain linear extension of a main power signal of a combined circuit for branch similar input combining and a main signal, and also improves the linear ACPR value of a Class-C-like main power signal to 40-45 dBc or more after gain linear extension of a main power signal of a combined main circuit with branch similar input combining and cancellation.