Decoupled maximum likelihood blind carrier offset estimator for OFDM systems

MM Lu*, A Nallanathan, TT Tjhung

*Corresponding author for this work

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

Abstract

In orthogonal frequency division multiplexing (OFDM) communication systems, the loss of orthogonality between the sub-carriers due to carrier-frequency offset can degrade the performance of the system. It must be compensated before the discrete Fourier transform-based demodulation. The estimation procedure based on the traditional maximum likelihood (NIL) criterion usually relies on the excess cyclic prefix (CP) symbols of OFDM system, hence reduces the bandwidth efficiency of the system when multipath channel is involved. In this paper, we present a decoupled maximum likelihood blind estimation method, which doesn't rely on the structure of CP. This method is suboptimum. However, it is shown that the performance of the proposed method is better than the existing blind carrier offset estimation methods. This method works well ei en if the SNR is very low.

Original languageEnglish
Title of host publicationVTC2004-FALL: 2004 IEEE 60TH VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-7
Place of PublicationNEW YORK
PublisherIEEE
Pages507-510
Number of pages4
ISBN (Print)0-7803-8521-7
Publication statusPublished - 2004
Event60th IEEE Vehicular Technology Conference - Los Angeles, Canada
Duration: 26 Sept 200429 Sept 2004

Conference

Conference60th IEEE Vehicular Technology Conference
Country/TerritoryCanada
Period26/09/200429/09/2004

Keywords

  • FREQUENCY OFFSET
  • NOISE

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