Review of Existing Methods for Side Lobe Suppression in OFDM System to Mitigate ICI

Considering growing demand of higher capacity and high speed wireless applications, there is need of a promising data transmission technique which can provide us these benefits along with good quality of service. Orthogonal Frequency Division Multiplexing (OFDM) is the technique which achieves these benefits. But due to multipath fading, it is sensitive to frequency offset caused by Doppler Effect. This frequency offset causes Inter carrier Interference (ICI) and degrades the performance of the system. The side lobes of OFDM signal are main sources of ICI caused by frequency offset. Researchers have invented many techniques to mitigate this ICI by suppressing side lobes. In this paper, we have reviewed these existing methods of side lobe suppression and by comparing their results commented on good techniques that can be helpful for achieving better side lobe suppression.