A Comparison of Frequency Offset Estimation Methods in Orthogonal Frequency Division Multiplexing (OFDM) Systems

Abstract

OFDM is a modulation technique that achieves high data rates, increased bandwidth efficiency and robustness in multipath environments. However, OFDM has some disadvantages, such as sensitivity to channel fading, large peak to average ratio and sensitivity to frequency offset. The latter causes intercarrier interference (ICI) and a reduction in the amplitude of the desired subcarrier which results in loss of orthogonality. In this thesis, the effects of frequency offset are studied in terms of loss of orthogonality. A number of techniques for frequency offset estimation are presented and tested in computer simulations.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 2004
Accession Number
ADA429888

Entities

People

  • Bulent Karaoglu

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Carrier Frequencies
  • Communication Systems
  • Computer Simulations
  • Computers
  • Data Rate
  • Demodulators
  • Doppler Effect
  • Engineering
  • Frequency
  • Frequency Division Multiplexing
  • High Definition Television
  • Modulation
  • Molecular Dynamics
  • Multiplexing
  • Orthogonal Frequency Division Multiplexing
  • Orthogonality
  • Simulations

Readers

  • Radio communications and signal processing.