Timing errors analysis of OFDM systems based on joint Cyclic-prefix and postfix

OFDM systems are sensitive to timing synchronization errors that refers to incorrect detection of the start position of an OFDM symbol. In this paper, first by considering cyclic-prefix (CPre) as a guard interval, formulas for various types of signal-to-interference (SIR) ratio in terms of timing errors are presented. Further we utilize CPre and Cyclic-postfix (CPost) jointly as a guard interval, and draw new SIR formulas. The simulations are performed in three different channels for DAB systems. As a result without any loss in bandwidth efficiency, the performance of DAB systems (based on joint CPre and CPost) would be more increased.