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Design of A Piecewise Polynomial Model Based Digital Predistortion for 60 GHz Power Amplifier
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 Title & Authors
Design of A Piecewise Polynomial Model Based Digital Predistortion for 60 GHz Power Amplifier
Kim, Minho; Lee, Jingu; Kim, Daehyun; Kim, Younglok;
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 Abstract
Recently, the study on 5G mobile communication systems using the millimeter-wave frequency band have been actively promoted and the importance of compensation of the nonlinearity of power amplifier caused by the characteristics of millimeter-wave frequency propagation attenuation is increasing. In the paper, we propose a piecewise polynomial model based on subdivision coefficient which are characteristics of power amplifier separated linear section and a non-linear section. In addition, the structure of digital predistortion based on the proposed model and direct learning method are proposed to implement a digital predistortion. To verify the proposed model, digital predistortion based on the proposed model and direct learning method for 60 GHz power amplifier using LTE signal implemented in the FPGA. And the hardware test bench measured performance and complexity. The proposed model achieves 3.3 dB gain over the single polynomial model in terms of the ACLR and reduces 7.5 percent in terms of the complexity.
 Keywords
Millimeter-Wave;Digital Predistortion;Power Amplifier;Piecewise Polynomial;Nonlinearity;
 Language
Korean
 Cited by
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