The era of wireless technologies, mobile communication is rapidly approaching. It has gradually become more & more involved into everyday life. In which users are demanding versatile & convenient modes of communication along with multiple variety of communication services such as high speed data, video & multimedia traffic also with voice signals. With guaranteeing certain quality of services without losing the performance and efficiency. All these challenges are present in 4G. So OFDM has been recognized has one of the most promising techniques to meet these challenges. OFDM, which is in tern enabled by the high level of performance.