Coarse time- and frequency synchronization applied in a mobile WiMAX system

  • Authors:

  • Tero Hurnanen;Jussi Poikonen;Jarkko Paavola

  • Affiliations:

  • The Graduate School in Electronics, Telecommunications and Automation and Department of Information Technology, University of Turku, Finland;Department of Information Technology, University of Turku, Finland;Department of Information Technology, University of Turku, Finland

  • Venue:
  • ISWCS'09 Proceedings of the 6th international conference on Symposium on Wireless Communication Systems
  • Year:
  • 2009

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Abstract

In this paper, we present coarse synchronization algoritms for OFDM systems, specifically applied with mobile WiMAX transmissions. We consider computationally efficient synchronization algorithms, which are applicable also without full knowledge of the properties of the transmitted signal at the receiver. Although the proposed algorithms are considered for a mobile WiMAX system, their application is not limited to the specific WiMAX signal structure. Indeed, they can be used on any OFDM system with certain type of training sequence. Approaches are considered both for time and for frequencydomain synchronization. In the time-domain case, the proposed algorithm improves the accuracy of a previously studied coarse synchronization approach without significant increase in computational complexity. Furthermore, the considered frequencydomain synchronization method provides computationally efficient and accurate results without explicit prior information on the transmitted signal contents, also in the presence of severe phase error caused by timing inaccuracy.