Robust Time and Frequency Synchronization in OFDM based 802.11a WLAN systems

In this paper, robust and efficient time and frequency synchronization technique suitable for IEEE 802.11a wireless LAN system is proposed. The proposed method performs OFDM symbol boundary detection and frequency offset estimation using correlation techniques. The conjugate property of long preamble is used to reduce the computational complexity. In this proposed method, coarse time and fine frequency offset are estimated jointly and the frequency offset is estimated accurately before fine time estimation