Analysis of a virtual carrier based carrier frequency offset estimation algorithm in the presence of I/Q imbalance in OFDM systems

Jiang Chang, I. Tai Lu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, we analyzed the feasibility of using a virtual carrier based carrier frequency offset estimation algorithm in the presence of I/Q imbalance in OFDM systems. Based on the analysis of the signal model with both receiver CFO and I/Q imbalance impairment we conclude that it is feasible to extending the virtual carrier based CFO estimation algorithm to the I/Q imbalance scenario. The CFO estimation performance is evaluated through computer simulation. Impact of parameters on the estimation performance is investigated and it is consistent with our analysis. After CFO correction, a blind based I/Q imbalance estimation and compensation algorithm is applied. The final detection performance demonstrates that the virtual carrier based CFO estimation performance is good enough for subsequent I/Q imbalance estimation and compensation.

Original languageEnglish (US)
Title of host publicationProceedings of the 2008 IEEE Sarnoff Symposium, SARNOFF
DOIs
StatePublished - 2008
Event2008 IEEE Sarnoff Symposium, SARNOFF - Princeton, NJ, United States
Duration: Apr 28 2008Apr 30 2008

Publication series

NameProceedings of the 2008 IEEE Sarnoff Symposium, SARNOFF

Other

Other2008 IEEE Sarnoff Symposium, SARNOFF
CountryUnited States
CityPrinceton, NJ
Period4/28/084/30/08

Keywords

  • Carrier frequency offset (CFO)
  • In-phase and quadrature-phase (I/Q) imbalance
  • Orthogonal frequency division multiplexing (OFDM)
  • Virtual carrier

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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