The people have entered into an era, an era where fast, accurate and secured data transmission is of maximum value. The Orthogonal Frequency Division Multiplexing (OFDM) put its need in the communication market for the effective bandwidth utilization with large data transmission. In this paper, the author present a best mapping method for an efficient physical layer implementation of an OFDM technique. They are well known about, the difficulties encountered while transmitting the data in air. There are different possibilities of various noises and errors to get added with the data.