Joint weighted least-squares estimation of carrier-frequency offset and timing offset for OFDM systems over multipath fading channels

Pei Yun Tsai, Hsin Yu Kang, Tzi Dar Chiueh

Research output: Contribution to journalArticlepeer-review

83 Scopus citations

Abstract

This paper presents an algorithm for joint estimation of carrier-frequency offset and timing offset for orthogonal frequency-division multiplexing (OFDM) systems in the tracking mode. The proposed weighted least-squares algorithm derives its estimates based on phase differences in the received pilot subcarrier signals between two symbols. Moreover, the optimal weights in two different channel conditions are derived. Both analysis and simulation show that the weighted least-squares algorithm can effectively and accurately estimate the carrier-frequency offset as well as the timing offset of OFDM signals in multipath fading channels.

Original languageEnglish
Pages (from-to)211-223
Number of pages13
JournalIEEE Transactions on Vehicular Technology
Volume54
Issue number1
DOIs
StatePublished - Jan 2005

Keywords

  • Carrier-frequency offset
  • Estimation
  • Synchronization
  • Timing offset
  • Weighted least squares

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