Two algorithms are described for performing frame (and OFDM symbol) timing acquisition and frequency-offset estimation in Fixed Broadband Wireless Access OFDM systems. They are evaluated in two different radio frequency bands, namely in 5.8 GHz where a severe multi-path environment is expected under Non-Line-Of-Sight (NLOS) conditions, and in the licensed 10.5 GHz band, under Line-Of-Sight (LOS) conditions. In addition, a new preamble structure with duration of two OFDM symbols is proposed here, that actually gives rise to the techniques proposed herein.
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