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This paper presents a blind synchronizer for Orthogonal Frequency-Division Multiplexing (OFDM) systems based on Signal-to-Interference-and-Noise-Ratio (SINR) maximization. Due to the incurred losses from Inter-Symbol Interference (ISI) and Inter-Carrier Interference (ICI) introduced by synchronization errors, the SINR of the received data drops drastically. By taking advantage of this characteristic, both the symbol time and carrier frequency offsets are intuitively estimated by maximizing the SINR metric. For the SINR metric, the authors propose a blind SINR estimation, which does not need prior knowledge of the channel profiles and transmitted data.
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