Ijraet Recovery of Oqam Signals Using Carrier Frequency Offset and Blind Symbol Timing Estimation in Ofdm Systems

Orthogonal frequency-division multiplexing (OFDM) systems are highly sensitive to synchronization errors. We introduce an algorithm for the blind estimation of symbol timing and carrier frequency offset in wireless OFDM systems. We consider the problem of blind symbol timing (ST) estimation for pulse-shaping orthogonal frequency division multiplexing (OFDM) systems based on offset quadrature amplitude modulation (OQAM).This paper deals with the matter of blind synchronization for OFDM/OQAM systems. Specifically, by exploiting the approximate conjugate-symmetry property of the start of a burst of OFDM/OQAM symbols, attributable to the presence of the time offset, a replacement procedure for blind symbol timing and CFO estimation is proposed. By using computer simulations, the performances of Blind symbol estimators are analyzed. This result gives better Signal-to-Noise Ratio for proposed method.