Techniques

Abstract: Orthogonal Frequency Multiplexing (OFDM) has been increasingly used in modern wired and wireless communication systems due to its high data rate, immunity to noise and high frequency spectral efficiency. The major drawback in using OFDM technique is its high Peak to Average Power Ratio (PAPR). Within the existing PAPR reduction techniques, Selective Mapping is most popularly used Technique. In this paper, we discuss various PAPR reduction techniques. And find out that the signal scrambling techniques are having most advantages in terms of no out of band radiations and BER. But these techniques are more complex than others