High frequency amplifier and method of compensating for distortion
AssigneeSamsung Electronics Co., Ltd.
InventorTakashi OKAZAKI
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Abstract
Disclosed is a high frequency amplifier which can properly compensate for distortion generated in a power amplifier even when an observation band of a feedback signal is made narrow. The high frequency amplifier includes a data correction unit that corrects transmission data through a digital pre-distortion method, and the data correction unit includes an orthogonalizer that orthogonalizes and outputs respective order components of a polynomial model for the digital pre-distortion method, and a compensator that compensates for a memory effect of the power amplifier for an output of the orthogonalizer.
Claims19
A high frequency amplifier comprising:
- a data correction unit configured to correct transmission data based on digital pre-distortion;
- a power amplifier configured to amplify output power of a transmission signal generated as a function of the corrected transmission data;
- a feedback signal output unit configured to output the amplified transmission signal;
- and
- an error detector configured to calculate a correction value to correct the transmission data based on a feedback signal output from the feedback signal output unit and a reference signal output from the data correction unit.
A method to compensate for distortion the method comprising:
- correcting transmission data based on digital pre-distortion;
- outputting the corrected transmission data as a reference signal;
- amplifying output power of a transmission signal generated from the corrected transmission data;
- outputting the amplified transmission signal as a feedback signal;
- and
- calculating and updating a correction value to correct the transmission data based on the feedback signal and the reference signal.
Dependencies are inferred from the claim text.