Improvement of a time synchronization algorithm for IEEE 802.11a/g WLAN standard

Abstract

In this paper a time synchronization algorithm for IEEE 802.11a/g OFDM-WLAN standard is evaluated and some modifications are proposed to improve its performance. The original synchronization algorithm utilizes coarse and fine estimation. In this paper fine time estimation is done using a cross-correlation as the original algorithm does, but different solutions are evaluated to cope with the problems of the coarse estimation in the original algorithm. The performances of these alternatives are tested by simulation in multi-path channels, at low signal to noise ratio and with carrier frequency offset. Also, the computational cost is evaluated.