A blind synchronizer for OFDM systems based on SINR maximization in multipath fading channels

Wen Long Chin*, Sau-Gee Chen

*Corresponding author for this work

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

This paper presents a blind synchronizer for orthogonal frequency-division multiplexing (OFDM) systems based on signal-to-interference-and-noise ratio (SINR) maximization. Due to the incurred losses from intersymbol interference (ISI) and intercarrier interference (ICI) introduced by synchronization errors, the SINR of the received data drastically drops. By taking advantage of this characteristic, both the symbol time and carrier frequency offsets are intuitively estimated by maximizing the SINR metric. For the SINR metric, two blind SINR estimations are investigated. The estimations do not need prior knowledge of the channel profiles and transmitted data. As such, the proposed maximum SINR (MSINR) synchronization algorithm is nondata aided so that the transmission efficiency can be improved. Moreover, to reduce the computational complexity, the early-late gate technique is proposed for the implementation of the synchronizer. Simulation results exhibit better performance for the MSINR algorithm than conventional techniques in multipath fading channels.

Original languageEnglish
Pages (from-to)625-635
Number of pages11
JournalIEEE Transactions on Vehicular Technology
Volume58
Issue number2
DOIs
StatePublished - 9 Mar 2009

Keywords

  • Blind synchronization
  • Blind Synchronization
  • Early-late Gate
  • Early-late gate (ELG)
  • OFDM
  • Orthogonal frequency-division multiplexing (OFDM)
  • Signal-to-interference-and-noise-ratio (SINR) maximization
  • SINR Maximization

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