Undersampling Digital Predistortion Compensation Technology Based on Broadband Signals

Rui Zhang; Zhi Bin Zeng

doi:10.4028/www.scientific.net/AMM.543-547.2381

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 543-547Undersampling Digital Predistortion Compensation...

Undersampling Digital Predistortion Compensation Technology Based on Broadband Signals

Abstract:

Nonlinearity of power amplifier always results in spectrum spreading on input signal. When using digital predistortion technology to compensate power amplifier's nonlinearity, the required sampling frenquence for the output signal of amplifier is times of the original signal. The undersampling predistortion method can reduce the sampling frequency requirements. However, for the broadband signal, due to the significant memory effect of the power amplifier, the performance of undersampling digital predistortion is not satisfactory. In order to improve the undesirable predistortion performamce, this paper presents two kinds of undersampling digital predistortion compensation methods. For different sampling frequencies, the predistortion performances of these two kinds of compensation methods are different.

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Periodical:

Applied Mechanics and Materials (Volumes 543-547)

Pages:

2381-2384

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.543-547.2381

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Online since:

March 2014

Authors:

Rui Zhang*, Zhi Bin Zeng

Keywords:

Broadband Signal, Digital Predistortion, Nonlinearity, PA, Spectrum Spreading, Undersampling

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