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Performance Analysis of Detection Threshold on OFDM Time Synchronization Using PN Sequences
Yuan Tian,Xia Lei,Wanbin Tang,Shaoqian Li 보안공학연구지원센터 2008 International Journal of Software Engineering and Vol.2 No.3
Many synchronization algorithms for orthogonal frequency division multiplexing (OFDM) systems have been proposed. Among them, the time synchronization algorithm by correlating the training sequence with the local known sequence can obtain good performance with a sharp synchronization peak. Detection threshold is an important and necessary parameter in time synchronization. In this paper, based on this algorithm, we evaluate three different methods of setting threshold and point out one method which performs well when SNR is in large dynamic range. The simulation results are consonant with our theoretic analyses and show that this method is suitable for OFDM systems in multi-path fading channel.