Comparative Study of Frequency Synchronization in SISO and MIMO-OFDM Systems

The need for high data rate is growing since the multimedia applications are gaining popularity which needs high data rate and quality of service. Multiple Input Multiple Output (MIMO) transmission system is one of the most promising approach of the Smart Antenna Technology which uses multiple antennas in the transmitter and the receiver side and is currently followed for high-rate wireless communication[1]. Synchronization is crucial in all wireless communication systems and especially in OFDM and MIMO-OFDM system [2]. The receivers cannot know the beginning and the end of the OFDM symbols, so the placement of the FFT window. In reception, they have their own frequency rate which is asynchronous with the frequency of the transmitter. Several estimation techniques for time and frequency offset have been proposed in the literature, but varied test conditions make comparison difficult. This paper presents the results of a comparative Study of Frequency Synchronization in SISO and MIMO-OFDM Systems.