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Comparison and analysis of PAPR reduction techniques in OFDMA and SC-FDMA systems

Abstract:

This paper presents an analysis of the Orthogonal Frequency Division Mutiple Access (OFDMA) and Single Carrier Frequency Division Multiple Access (SCFDMA) signals with high Peak to-Average Power Ratio (PAPR). The large envelope variations of the transmitted signals is the main drawback, which degrades the performance of the wireless systems and increases the power consumption of the transmitter.Two different PAPR reduction techniques, Clipping and Filtering (CAF) and Selective Mapping (SLM) are evaluated by using the complementary cumulative distribution function (CCDF) of the PAPR for both access schemes. Simulation results show that CAF is very effective for both OFDMA and SC-FDMA in reducing PAPR levels.