Abstract:
Orthogonal frequency division multiplexing (OFDM) is considered as a one of the best
modulation schemes in wireless communications however, OFDM suffers from the
Sensitivity to frequency offset his frequency offset introduces the problem of inter-carrier
interference (ICI) in OFDM system.
This Project presents a new self-cancellation technique (modified self-cancellation technique)
using the self-cancellation technique with zero – gab. In proposed technique a zero sub-carriers
carries are used in order to mitigate the interference occurred by the main – lobe of the two
adjacent sub-carriers, in addition to zeros sub-carrier, the proposed technique used selfcancellation
in order To mitigate the effect of the side-lobes of other sub-carriers.
In terms of carrier-to-interference ratio (CIR) and bit-error rate (BER) the modified selfcancellation
technique gives good results compared to that using only the Conventional selfcancellation
technique.
