Frame Synchronization Symbols for an OFDM System

In this paper, the problem of frame synchronization in Orthogonal Frequency Division Multiplexing (OFDM) system is considered. For an OFDM system, frame synchronization is achieved by forcing the receiver to start its FFT at the right time. One way in which this may be achieved is to precede the OFDM data with a special synchronization symbol. Two synchronization symbols are proposed to achieve frame synchronization for an OFDM, the wobbulation symbol and the Barker code. These symbols are evaluated in AWGN and two-ray multipath channels, and performances are compared in terms of the probability of correct synchronization.