Power consumption trade-off between power amplifier OBO, DPD, and clipping and filtering

Sandrine Boumard, Mika Lasanen, Olli Apilo, Atso Hekkala, C. Cassan, J.-P. Verdeil, J. David, L. Pichon

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

3 Citations (Scopus)


This paper investigates the trade-off between power amplifier (PA) nonlinearity, output power backoff (OBO), digital predistortion (DPD), and clipping and filtering (CF) in terms of energy consumption. The energy efficiency of a PA depends on the OBO of the signal and usually increases as the OBO decreases. Peak to average power ratio (PAPR) reduction methods like CF and PA linearization algorithms like DPD methods allow the use of a smaller OBO. Those algorithms show best results when used together. By studying the trade-off between the power consumed in the CF and DPD circuits versus having a larger OBO for a target bit-error rate (BER), we show that below a certain PA output power the power consumption is not reduced by decreasing the OBO. We also show that the increase in distortion noise when using DPD and CF might defeat the purpose of their use in terms of power consumption. Given the trend toward smaller cells like femtocells, requiring less output power, CF and DPD may not be required at all, leading to a simpler and power saving transmitter design.
Original languageEnglish
Title of host publicationProceedings
Subtitle of host publication26th International Teletraffic Congress, ITC 2014
PublisherIEEE Institute of Electrical and Electronic Engineers
Number of pages5
ISBN (Print)978-0-9883045-0-5
Publication statusPublished - 2014
MoE publication typeA4 Article in a conference publication
Event26th International Teletraffic Congress, ITC 26 - Karlskrona, Sweden
Duration: 9 Sep 201411 Sep 2014
Conference number: 26th


Conference26th International Teletraffic Congress, ITC 26
Abbreviated titleITC 26


  • distortation
  • power amplifirs
  • temtocellular radio
  • digital predistortion
  • peak-to-average-power ratio
  • power efficiency

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