PAPR Reduction of OFDM Using Modified Selective Mapping and Clipping Technique

Abstract

orthogonal frequency division multiplexing (OFDM) is multicarrier technique for high data transmission rate commonly used in 4G communication these days also used in digital video broadcasting (DVB) and many more application when ever high data transmission rate is required. The main problem of OFDM is high Peak-to-average power ratio because OFDM is highly sensitive to non-linear region of high power amplifier. Many more technique has been proposed and implemented to reduce Peak to Average power ratio and bring PAPR to desired level. Most commonly used techniques are partial transmitted sequence, selective mapping, clipping, tone injection and many more. This paper will deal about reduction in Peak- to-average power ratio using modified selective mapping (SLM) and clipping technique to ensure that OFDM system performance is improved.