Published Paper Details:

The MIMO OFDM system has become the superior wireless transmission technique in high speech wireless communication systems. MIMO OFDM has been chosen as the air interface technique for LTE (Long Term Evolution) standard. OFDM system is sensitive to synchronization errors generated by multipath delay, Doppler shift and oscillator instability. In this paper, we address the synchronization problem in non-continuous scenario and propose a block type pilot based synchronization algorithm to suppress the STO (Sampling Timing Offset) and CFO (Carrier Frequency Offset). The pilot pattern used here is CAZAC (Constant Amplitude Zero Autocorrelation) sequence, which is also exploited in LTE Advanced standard. Since the proposed method is a parallel processing, different bands could experience different synchronization errors. Simulation results show the proposed method can significantly improve system performance and has smooth performance when synchronization errors vary. The capacity maximization for the different wireless channels like AWGN, reileigh and Rician channels are estimated using modified Water filling algorithm.