Abstract—Orthogonal Frequency Division Multiplexing (OFDM) is an attractive modulation technique for transmitting large amounts of digital data over radio waves. One major dis-advantage of OFDM is the high peak to average power ratio (PAPR) considered as the main implementation drawback of OFDM system. In this paper, we are discussing about PAPR, which affects the performance and efficiency of Power Ampli-fier and its influence of utilizing the selective mapping (SLM) technique and Active Constellation Extension (ACE) for PAPR reduction in OFDM systems. The Proposed SLM and ACE techniques for reducing the PAPR are the most promising re-duction technique in its non-uniform phase factor for PAPR reduction in OFDM system. In addition, an approximate ex-pression using the complementary cumulative distribution func-tion (CCDF) of PAPR is discussed. The simulated results of comparative analysis demonstrate that OFDMA signals, which have used ACE technique, indeed provide a significant reduc-tion of PAPR in OFDM system.

Index Terms—Orthogonal frequency division multiplexing (OFDM), active constellation extension (ACE), peak to average power ratio (PAPR), selective mapping (SLM), quadrature phase shift keying (QPSK)

Cite: M. R. Anjum and Shi Pengfei, "Comparative Performance Analysis for Peak-to-Average Power Ratio Reduction in OFDM System Based on the Fractional Fourier Transform Using Selective Ma," Journal of Communications, vol. 9, no. 5, pp. 419-424, 2014. Doi: 10.12720/jcm.9.5.419-424