7 results about "Amplifier distortion" patented technology

A method for reducing receive band leakage may include: sensing, at a full duplexer, passive intermodulation distortion and power amplifier distortion; generating, at a processing device, a passive intermodulation distortion and power amplifier distortion cancellation signal; and cancelling, on a receive path, the passive intermodulation distortion and power amplifier distortion using the passive intermodulation distortion and power amplifier distortion cancellation signal.

The invention provides a frequency hopping predistortion method and system based on model prediction, relates to the technical field of frequency hopping communication, and aims to reduce the time for waiting for preceding stage convergence by correcting modulator distortion and amplifier distortion at the same time. By constructing a digital pre-distortion coefficient prediction model, a preset coefficient of a next-hop frequency hopping signal can be accurately solved; before each hop of frequency hopping input signal is input into the frequency hopping equipment, correction is carried out by using the preset coefficient to obtain the digital pre-distortion signal, so that the problem of low overall performance caused by poor early-stage performance of the signal is avoided. According to the invention, the performance of the digital pre-distortion technology in the frequency hopping equipment can be improved, the transmission performance of the frequency hopping signal is improved, and the light weight of the frequency hopping equipment is facilitated.

This invention discloses a precoding method for power amplifier distortion-resistant multi-antenna systems, belonging to the field of wireless communication and radar sensing fusion technology. This invention is mainly applied to integrated sensing systems. Compared with traditional integrated sensing systems that do not consider power amplifier nonlinearity, this invention incorporates the power amplifier nonlinearity into the system performance, providing a received signal model and sensing and rate indices under power amplifier distortion conditions. Compared with classical precoding algorithms, this invention considers the impact of power amplifier distortion, resulting in superior performance in practical systems. Furthermore, this invention uses alternating optimization and manifold optimization to solve the non-convex problem of rate maximization, and employs a two-stage solution, enabling its application to hybrid beamforming arrays and making it suitable for real-time applications.

The application discloses a digital pre-distortion method, which is applied to an electronic device. The electronic device is configured with a digital pre-distortion module for performing overall pre-distortion processing on signals before signal amplification of multiple transmission channels of the electronic device. The digital pre-distortion module comprises a first pre-distortion unit, a second pre-distortion unit and a third pre-distortion unit. The first pre-distortion unit and the second pre-distortion unit are arranged on a first platform of the electronic device. The third pre-distortion unit is arranged on each transmitter connected with an output of the first platform. The digital pre-distortion method comprises the following steps: calling the first pre-distortion unit to eliminate linear crosstalk among the multiple transmission channels; calling the second pre-distortion unit to eliminate nonlinear crosstalk among the multiple transmission channels; and calling the third pre-distortion unit to eliminate power amplifier distortion of each transmission channel. The application further discloses an electronic device, a computer readable storage medium and a computer program product.

A compensator compensates for distortion of a power amplifier circuit. A power amplifier neural network (PAN) is trained to model the power amplifier circuit using a predetermined input and output signal pair characterizing the power amplifier circuit. The compensator is then trained to pre-distort a signal received by the PAN. The compensator uses the trained neural network to optimize a loss between an input to the compensator and an output of the PAN, and the loss is computed according to a multi-objective loss function including one or more time-domain loss functions and one or more frequency-domain loss functions. The trained compensator performs signal compensation, outputting a pre-distorted signal to the power amplifier circuit.

Embodiments include methods for a transmitter configured to generate transmissions to a receiver. Such methods include determining a backoff from a maximum allowed output power for a first transmission, which is to be amplified by a power amplifier (PA). The determined backoff is inversely related to an amount of distortion in the first transmission due to non-linearity of the PA. Such methods include selectively reducing the determined backoff by a first amount, based on whether compensation for the distortion is available at the receiver and / or at the transmitter. Such methods include sending one or more of the following information to the receiver: the determined backoff, an indication of whether the determined backoff was reduced, and the first amount by which the determined backoff was reduced. Other embodiments include complementary methods for a receiver, as well as transmitters and receivers configured to perform such methods.

A method for reducing receive band leakage may include: sensing, at a full duplexer, passive intermodulation distortion and power amplifier distortion; generating, at a processing device, a passive intermodulation distortion and power amplifier distortion cancellation signal; and cancelling, on a receive path, the passive intermodulation distortion and power amplifier distortion using the passive intermodulation distortion and power amplifier distortion cancellation signal.