Performance Evaluation Coarse Time Synchronization of OFDM System Under COST 207 Multipath Channel Model

Robust high data rate have several challenges in mobile communication, because data transmission experience higher delay spread and the link is less reliable. Orthogonal Frequency Division Multiplexing (OFDM) is suitable modulation technique for higher delay spread applications. However the performance of OFDM is very sensitive against time synchronization error. In this research, we evaluate the performance of coarse timing synchronization in OFDM communication system under COST 207 multipath channel model. We give performance evaluation of time synchronization by comparing the existing time synchronization algorithms that has impulse-like timing metric. Here will be presented four algorithms that use preamble based to calculate the arrival time of OFDM symbol. Simulation is done by considering effect of Channel Impulse Response (CIR), Signal to Noise Ratio (SNR), and Carrier Frequency Offset (CFO). Performance of the algorithm is measured by MSE (Mean Squared Error) of timing point. Simulation result show that using identical symmetric training symbol is good for rural area. A methode using statistical change of symmetric correlator is good for urban, bad urban, and hilly terrain area and can reduce ambiguity for calculating the arrival time of OFDM symbol at receiver side.