Abstract
One of the major drawbacks of the orthogonal frequency
division multiplexing (OFDM) type of communication is the
high peak-to-average power ratio (PAPR) of the
transmitted signal. Unless carefully tackled, this may
cause either reduced energy efficiency or increased
nonlinear distortion when the signal is amplified for
transmission. For improving energy efficiency, this paper
considers PAPR reduction in OFDM based systems. In
particular, we study and compare some PAPR reduction
approaches including three exponential companding
and active constellation extension (ACE) methods. We
discuss the trade-offs of the methods. In addition, for
the ACE method defined in the ETSI standard, we propose
some modifications that give about 1 dB more PAPR
reduction without any additional power increase of the
transmitted signal. Moreover, if some spectral regrowth
due to the PAPR reduction is acceptable, exponential
companding approaches can also be used.
Original language | English |
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Title of host publication | 26th International Teletraffic Congress |
Publisher | IEEE Institute of Electrical and Electronic Engineers |
Number of pages | 5 |
ISBN (Electronic) | 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 Sep 2014 → 11 Sep 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
- ACE
- active constellation extension
- exponential companding
- OFDM
- peak-to-average power ratio