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Improvements for time and frequency synchronization in OFDM systems

: Schellmann, M.

Rohling, H. ; TU Hamburg-Harburg, Institut für Nachrichtentechnik:
11th International OFDM-Workshop, InOWo '06. Proceedings : August 30th/31st, Hamburg, Germany
Hamburg, 2006
5 pp.
International OFDM-Workshop (InOWo) <11, 2006, Hamburg>
Conference Paper
Fraunhofer HHI ()
computational complexity; ofdm modulation; signal detection; synchronisation

The most common synchronization algorithm used for preamble detection in an OFDM system is the Schmidl-Cox algorithm. As it has a high demand on computational complexity, we propose to use a simplified version based on a threshold value depending on the received energy. We show analytically that this algorithm achieves a similar detection performance. We further show attainable improvements of the preamble- based frequency synchronization if a preamble with multiple signal periods is applied.