An Overview of PAPR Reduction Technique for OFDM Signals by using Selective Mapping Technique (SLM)

Orthogonal Frequency Division Multiplexing (OFDM) is a promising technique used in the wireless broadband communication systems these days. It is a form of multi-carrier modulation technique. High spectral efficiency, robustness to channel fading, immunity to impulse interference, uniform average spectral density, capacity to handle very strong echoes and very less nonlinear distortion are the properties of the OFDM. One major disadvantage of OFDM is that the time domain OFDM signal which is a sum of several sinusoids leads to high peak to average power ratio (PAPR). Number of techniques have been proposed in the literature for reducing the PAPR in OFDM systems. In this paper, we discuss about the selected mapping technique (SML) for reducing the PAPR and the simulation result shows the PAPR reduction of OFDM signals. Keywords— CCDF, IFFT, OFDM, MIMO, Peak-to-Average Power Ratio, PAPR, SLM, Selection Mapping Technique.