Behavioural analysis of internal mechanism of nonlinear distortion in OFDM signal systems

Yiming Lei, Máirtín O'Droma

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

Abstract

The IMP distortion occurring with the amplification of OFDM signals through a nonlinear RF power amplifier (PA) is analysed with a view to establishing internal relations and impairment significance of different types and combinations - composition categories- of IMPS. Through this, a novel estimation method was deduced to calculate power spectral densities (PSD) of nonlinear distortion. This method also helps expose some PA independent and operating point (OP) independent characteristics of PSD of nonlinear distortion. The simulation and analysis is based on the use of an IEEE 802.11a OFDM signal and a nonlinear PA model is derived from envelope characteristic measurements of an X-band and S-band GaN power amplifier.

Original languageEnglish
Title of host publicationGLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference
DOIs
Publication statusPublished - 2009
Event2009 IEEE Global Telecommunications Conference, GLOBECOM 2009 - Honolulu, HI, United States
Duration: 30 Nov 20094 Dec 2009

Publication series

NameGLOBECOM - IEEE Global Telecommunications Conference

Conference

Conference2009 IEEE Global Telecommunications Conference, GLOBECOM 2009
Country/TerritoryUnited States
CityHonolulu, HI
Period30/11/094/12/09

Keywords

  • Composition type
  • Inter-modulation products
  • OFDM
  • Power spectral density

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