Performance of mobile OFDM systems over time-varying non-linearities with memory

Alexander Beremiz Hilario Tacuri, José Mauro Fortes

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

Abstract

The performance of modern communications transmitters utilizing multi-carrier modulation techniques is highly sensitive to non-linear distortions arising mainly from the highpower amplifier (HPA). The increase in symbol duration makes the system more sensitive to time-varying channels. In addition, the wideband characteristics of multi-carrier signals result in frequency-dependent distortions, typically know as memory effects. This paper presents analytical expressions that could be used to evaluate the impact of the distortions induced by time-varying non-linearities with memory on the BER performance of a multi-carrier signal such as the orthogonal frequency division multiplexing (OFDM). The time-varying non-linearity with memory is modeled by a time-varying Volterra Series. The resulting mathematical expressions are applied to an specific situation, allowing for a quantitative evaluation of the system performance degradation.

Original languageEnglish
Title of host publication2014 11th International Symposium on Wireless Communications Systems, ISWCS 2014 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages39-43
Number of pages5
ISBN (Electronic)9781479958634
DOIs
StatePublished - 21 Oct 2014
Externally publishedYes
Event2014 11th International Symposium on Wireless Communications Systems, ISWCS 2014 - Barcelona, Spain
Duration: 26 Aug 201429 Aug 2014

Publication series

Name2014 11th International Symposium on Wireless Communications Systems, ISWCS 2014 - Proceedings

Conference

Conference2014 11th International Symposium on Wireless Communications Systems, ISWCS 2014
Country/TerritorySpain
CityBarcelona
Period26/08/1429/08/14

Bibliographical note

Publisher Copyright:
© 2014 IEEE.

Keywords

  • multi-path channels
  • non-linearity
  • OFDM
  • performance analysis

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