Amplifier correction and beamforming arrangement
AssigneeArgo Semiconductors SA
InventorsGeorgios VOLANIS, Konstantinos VRYSAS, Georgios SFIKAS, Emmanouil FRANTZESKAKIS
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Abstract
Apparatus for causing a power amplifier (PA) to act as an idealized power amplifier (iPA). The apparatus comprises: a fixed digital predistortion (DPD) circuit; a PA coupled to the DPD circuit, the PA receiving as an input a version of a signal supplied as an output by the DPD and the PA supplying as an output an amplified version of the PA input; and a neural network adapted to control a level of amplification provided by the PA; wherein the neural network receives an indication of the input to the PA and an indication of output of the PA and controls the level of amplification provided by the PA based on the received indications.
Claims28
Apparatus for causing a power amplifier (PA) to act as an idealized power amplifier (iPA), comprising:
- a fixed digital predistortion (DPD) circuit;
- a PA coupled to the DPD circuit, the PA receiving as an input a version of a signal supplied as an output by the DPD and the PA supplying as an output an amplified version of the PA input;
- and
- a neural network adapted to control a level of amplification provided by the PA;
- wherein the neural network receives an indication of the input to the PA and an indication of output of the PA and controls the level of amplification provided by the PA based on the received indications.
A beamforming transmitter for use in wireless communication, comprising
- a plurality of fixed digital predistortion (DPD) circuits each receiving a respective input for transmission and supplying as an output an adjusted version of its received input;
- a plurality of filtering and gain chains, each of the plurality of filtering and gain chains receiving as input a respective one of the adjusted versions of the inputs;
- and
- a plurality of idealized beamformers (iBFs), each iBF of the plurality being coupled to receive as input an output supplied from one of the filtering and chain gains and supplying as output an amplified version of its respective received input for transmission by at least one antenna, wherein each of the filtering and gain chains supplies its output to a plurality of the iBFs, wherein each iBF comprises:
- a power amplifier (PA);
- a neural network adapted to control a level of amplification provided by the PA based an indication of the input to the PA and an indication of output of the PA which are supplied to the neural network;
- and
- an analog beamformer interposed between input to the iBF and the PA of the iBF, the analog beamformer controlling at least one of phase and amplitude of an output signal based on the input to the iBF.
Dependencies are inferred from the claim text.