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Parallel Digital Predistortion Design on Mobile GPU and Embedded Multicore CPU for Mobile Transmitters

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Abstract

Digital predistortion (DPD) is a widely adopted baseband processing technique in current radio transmitters. While DPD can effectively suppress unwanted spurious spectrum emissions stemming from imperfections of analog RF and baseband electronics, it also introduces extra processing complexity and poses challenges on efficient and flexible implementations, especially for mobile cellular transmitters, considering their limited computing power compared to basestations. In this paper, we present high data rate implementations of broadband DPD on modern embedded processors, such as mobile GPU and multicore CPU, by taking advantage of emerging parallel computing techniques for exploiting their computing resources. We further verify the suppression effect of DPD experimentally on real radio hardware platforms. Performance evaluation results of our DPD design demonstrate the high efficacy of modern general purpose mobile processors on accelerating DPD processing for a mobile transmitter.

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Acknowledgments

This work was supported by the US NSF under grants EECS-1408370, CNS-1265332, ECCS-1232274, and the Finnish Agency of Innovation, Tekes.

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Authors and Affiliations

  1. Department of Electrical and Computer Engineering, Rice University, Houston, TX, 77005, USA

    Kaipeng Li, Chance Tarver & Joseph R. Cavallaro

  2. Department of Computer Science and Engineering, University of Oulu, Oulu, Finland

    Amanullah Ghazi & Markku Juntti

  3. Department of Electronics and Communication Engineering, Tampere University of Technology, Tampere, Finland

    Jani Boutellier, Mahmoud Abdelaziz, Lauri Anttila & Mikko Valkama

Authors
  1. Kaipeng Li
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  2. Amanullah Ghazi
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  3. Chance Tarver
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  4. Jani Boutellier
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  5. Mahmoud Abdelaziz
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  6. Lauri Anttila
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  7. Markku Juntti
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  8. Mikko Valkama
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  9. Joseph R. Cavallaro
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Correspondence to Kaipeng Li.

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Li, K., Ghazi, A., Tarver, C. et al. Parallel Digital Predistortion Design on Mobile GPU and Embedded Multicore CPU for Mobile Transmitters. J Sign Process Syst 89, 417–430 (2017). https://doi.org/10.1007/s11265-017-1233-y

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  • DOI: https://doi.org/10.1007/s11265-017-1233-y

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