Abstract
Orthogonal Frequency Division Multiplexing (OFDM) has grown to a popular communication technique for high speed communication in the last decade. OFDM is an important member of the multicarrier modulation (MC) techniques and it has been adopted as a standard for various high data rate wireless communication systems due to its spectral bandwidth efficiency, robustness to frequency selective fading channels, etc. Although it is having many advantages it has two major drawbacks namely high PAPR and inter carrier interference (ICI). This paper is aimed to reduce the effect of PAPR and we proposed two techniques for the reduction of high Peak to Average Power Ratio (PAPR) based on Clipping, Differential Scaling. keywords: Orthogonal frequency division multiplexing (OFDM), partial transmit sequences (PTS), peak-toaverage power ratio(PAPR), selected mapping (SLM), tone reservation (TR), inter carrier interference (ICI), Companding, Active constellation, Multi carrier(MC).
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