Threshold detection analysis for OFDM timing and frequency recovery

Authors:
S. Rosati;A. B. Awoseyila;A. Vanelli-Coralli;C. Kasparis;G. E. Corazza;B. G. Evans
Affiliations:
DEIS/ARCES, University of Bologna, Bologna, Italy;CCSR, University of Surrey, Guildford, Surrey, UK;DEIS/ARCES, University of Bologna, Bologna, Italy;CCSR, University of Surrey, Guildford, Surrey, UK;DEIS/ARCES, University of Bologna, Bologna, Italy;CCSR, University of Surrey, Guildford, Surrey, UK
Venue:
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Year:
2009

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Abstract

Some recently proposed robust methods for time-domain timing and frequency synchronization in OFDM systems incorporate the use of cross-correlation based threshold detection in their timing adjustment and joint time-frequency algorithms. In this paper, we analyze the threshold criterion used and derive its theoretical performance. This translates into a better characterization of these OFDM synchronization algorithms, leading to a closer match between design expectations and practical performance. Computer simulations show a strong agreement between theoretical predictions and numerical results.