2018 52nd Asilomar Conference on Signals, Systems, and Computers 2018
DOI: 10.1109/acssc.2018.8645137
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Digital Predistortion in Large-Array Digital Beamforming Transmitters

Abstract: In this article, we propose a novel digital predistortion (DPD) solution that allows to considerably reduce the complexity resulting from linearizing a set of power amplifiers (PAs) in single-user large-scale digital beamforming transmitters. In contrast to current state-of-the art solutions that assume a dedicated DPD per power amplifier, which is unfeasible in the context of large antenna arrays, the proposed solution only requires a single DPD in order to linearize an arbitrary number of power amplifiers. T… Show more

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Cited by 21 publications
(19 citation statements)
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References 15 publications
(26 reference statements)
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“…These confirm the analytical results of Section II. In general, understanding the spatial behaviour of OOB distortions is key when developing efficient digital predistortion (DPD) solutions for multiple antenna transmitters [5], [6].…”
Section: Numerical Examples and Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…These confirm the analytical results of Section II. In general, understanding the spatial behaviour of OOB distortions is key when developing efficient digital predistortion (DPD) solutions for multiple antenna transmitters [5], [6].…”
Section: Numerical Examples and Resultsmentioning
confidence: 99%
“…Referring to the definitions in Fig. 1, it is easy to see that (5) and (6) add up coherently in the respective directions defined bỹ…”
Section: A Basic Two-tone Modelmentioning
confidence: 99%
“…However, the associated computational is still unsatisfying and limits its practical application in massive MU-MIMO. In [8], authors proposed a DPD based solution that requires only one DPD component per user to linearize an arbitrary number of PAs enabling then the reduction of the complexity associated to the linearization of the different used PAs.…”
Section: Introductionmentioning
confidence: 99%
“…The feedback structure enables the continuous update of the DPD coefficients for any change in the amplitude and phase weights causing a change in the input power per PA. However, this requires a rapid update of the DPD coefficients with in the coherence time of the channel [9]. This would cost high power consumption in the baseband signal processing for broadband signals and high speed ADC cost in the feedback path.…”
Section: Introductionmentioning
confidence: 99%