Carrier frequency offset estimation for OFDM-based WLANs

We present an efficient carrier frequency offset (CFO) estimation algorithm for the orthogonal frequency-division multiplexing (OFDM)-based wireless local area networks (WLANs). The packet preamble information we use is based on the high rate WLAN standards adopted by the IEEE 802.11 standardization group. Numerical results are presented to demonstrate the effectiveness of the proposed algorithm. Index Terms---Carrier frequency, maximum likelihood (ML), orthogonal frequency-division multiplexing (OFDM), wireless local area network (WLAN). I