Effects of frequency offset compensation error on channel estimation for OFDM system under mobile radio channels

Seung Young Park, Bo Seok Seo, Chung Gu Kang

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In this paper, we analyze the effects of frequency offset compensation on the pilot-assisted channel estimation for the orthogonal frequency division multiplexing system under a time-variant multipath fading channel. The analysis focuses on the pilot arrangement of a pilot-assisted channel estimation scheme, in which the minimum mean-square error channel estimation is employed to exploit both time- and frequency-domain correlation characteristics of the frequency response of time-variant multipath fading channels. We also investigate the effect of the length of the training signal used for frequency offset estimation on the channel estimation and subsequently, on the bit error rate performance, subject to varying signal-to-noise power ratio under mobile radio channel. Numerical results show that the maximum allowable pilot carrier spacing in time-domain is critically affected by the frequency offset error. In addition, a proper length of the training signal must be configured to suppress the noise influence while reducing a systematic error due to the time-variant behavior of the channel.

Original languageEnglish
Pages (from-to)2621-2630
Number of pages10
JournalSignal Processing
Volume83
Issue number12
DOIs
Publication statusPublished - 2003 Dec

Keywords

  • Channel estimation
  • Frequency offset
  • OFDM
  • Pilot carrier arrangement
  • Rayleigh fading

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Software
  • Signal Processing
  • Computer Vision and Pattern Recognition
  • Electrical and Electronic Engineering

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