Impact of linear power amplifier efficiency on capacity of OFDM systems with clipping

Gill R. Tsouri, Dov Wulich

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

6 Scopus citations

Abstract

Capacity of clipped OFDM systems is analyzed. In contradistinction to previous work, we take into account intrinsic properties of the linear power amplifier efficiency - the dependence of power efficiency on clipping ratio. The following tradeoff emerges: a low clipping ratio causes signal distortion and decreases capacity. However, it also increases the efficiency of the power amplifier, which increases capacity. We resolve this tradeoff by evaluating the optimal clipping ratio for achieving maximal capacity. We show that increasing the clipping ratio doesn't necessarily result in higher capacity. Instead there exists an optimal clipping ratio for given channel SNR. Increasing the clipping ratio beyond optimal significantly reduces capacity.

Original languageEnglish
Title of host publication2008 IEEE 25th Convention of Electrical and Electronics Engineers in Israel, IEEEI 2008
Pages134-136
Number of pages3
DOIs
StatePublished - 1 Dec 2008
Event2008 IEEE 25th Convention of Electrical and Electronics Engineers in Israel, IEEEI 2008 - Eilat, Israel
Duration: 3 Dec 20085 Dec 2008

Publication series

NameIEEE Convention of Electrical and Electronics Engineers in Israel, Proceedings

Conference

Conference2008 IEEE 25th Convention of Electrical and Electronics Engineers in Israel, IEEEI 2008
Country/TerritoryIsrael
CityEilat
Period3/12/085/12/08

Keywords

  • Capacity
  • Clipping
  • OFDM
  • PAPR

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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