Digital pre-distortion for frequency range 2 systems
AssigneeSamsung Electronics Co., Ltd.
InventorsYanru Tang, Hou-Shin Chen, Sahana Sadagopan, Bhupinder Sachdev, Pranav Dayal
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Abstract
Methods and devices are provided in which a processor of a user equipment (UE) combines loop-back signals from a plurality of antenna paths of the UE to generate a combined signal. The loop-back signals are based on a signal transmitted over the antenna paths. The processor determines power amplifier (PA) polynomials based on a comparison of the combined signal to the signal transmitted over the antenna paths. The processor generates a single look-up table (LUT) for the PA polynomials. The processor applies the single LUT to a transmitted signal of the UE to compensate for PA non-linearity.
Claims20
A method comprising:
- combining, by a processor of a user equipment (UE), loop-back signals from a plurality of antenna paths of the UE to generate a combined signal, wherein the loop-back signals are based on a signal transmitted over the antenna paths;
- determining, by the processor, power amplifier (PA) polynomials based on a comparison of the combined signal to the signal transmitted over the antenna paths;
- generating, by the processor, a single look-up table (LUT) for the PA polynomials;
- and
- applying, by the processor, the single LUT to a transmitted signal of the UE to compensate for PA non-linearity.
A user equipment (UE) comprising:
- a processor;
- and
- a non-transitory computer readable storage medium storing instructions that, when executed, cause the processor to:
- combine loop-back signals from a plurality of antenna paths of the UE to generate a combined signal, wherein the loop-back signals are based on a signal transmitted over the antenna paths;
- determining power amplifier (PA) polynomials based on a comparison of the combined signal to the signal transmitted over the antenna paths;
- generate a single look-up table (LUT) for the PA polynomials;
- and
- apply the single LUT to a transmitted signal of the UE to compensate for PA non-linearity.
A user equipment (UE) comprising:
- a plurality of antennas, each having a respective antenna path for transmission of a signal and reception of a respective loop-back signal;
- at least one power amplifier (PA);
- and
- a processor configured to:
- combine the loop-back signals from the antenna paths to generate a combined signal;
- determine PA polynomials based on a comparison of the combined signal to the signal transmitted over the antenna paths;
- generate a single look-up table (LUT) for the PA polynomials;
- and
- apply the single LUT to a transmitted signal to compensate for non-linearity of the at least one PA.
Dependencies are inferred from the claim text.