Increasing demand of high-speed wireless communications, and shortage of available bandwidth necessitate the use of a new generation of communication system capable of utilizing less bandwidth. Deployment of OFDM has let us to reach this aim, however, it still needs to be improved and deal with many obstacles which is required to have a better experience in communicating devices. One of the main challenges in OFDM systems is to solve the issue of the self-interference. Self-Interference happens when the transceiver receives what it is sending, because the transmitter and receiver work in the same frequency. Thus, when it receives the transmitted signal, we should implement an algorithm to remove Self-Interference signal and get the Signal of Interest.