Abstract
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 language | English |
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Title of host publication | 26th International Teletraffic Congress (ITC 2014) |
Publisher | IEEE Institute of Electrical and Electronic Engineers |
Number of pages | 5 |
ISBN (Print) | 978-0-9883045-0-5 |
DOIs | |
Publication status | Published - 2014 |
MoE publication type | A4 Article in a conference publication |
Event | 26th International Teletraffic Congress, ITC 26 - Karlskrona, Sweden Duration: 9 Sept 2014 → 11 Sept 2014 Conference number: 26th |
Conference
Conference | 26th International Teletraffic Congress, ITC 26 |
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Abbreviated title | ITC 26 |
Country/Territory | Sweden |
City | Karlskrona |
Period | 9/09/14 → 11/09/14 |
Keywords
- distortation
- power amplifirs
- temtocellular radio
- digital predistortion
- peak-to-average-power ratio
- power efficiency