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ZCT Precoding Based SLM Technique for PAPR Reduction

. International Journal of Trend in Scientific Research and Development 2 (6): 596-602 (October 2018)

Abstract

High Peak to Average Power Ratio PAPR is the major drawback of Orthogonal Frequency Division Multiplexing OFDM system. In this paper, we propose Zadoff-Chu matrix Transform ZCT precoding Selected Mapping SLM based OFDM SLM-OFDM system for PAPR reduction. This technique is based on precoding the constellation symbols with ZCT precoder matrix row-wise after the multiplication of phase rotation factor and before the Inverse Fast Fourier Transform IFFT in the SLM based OFDM SLM-OFDM Systems. At the clipping rate of 10-3, simulation results show that our proposed system can reduce the PAPR up to 6.8 dB with N=64 or 256 System subcarriers and V=16 Dissimilar phase sequences for 4QAM modulation. ZCT based SLM-OFDM system can avoid signal degradation in performance when passes through a nonlinear High-Power-Amplifier HPA . A. A. A. Wahab | L. T. Zhan | H. Husin | W. A. F. W. Othman | Syed Sahal Nazli Alhady "ZCT Precoding Based SLM Technique for PAPR Reduction" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-6 , October 2018, URL: http://www.ijtsrd.com/papers/ijtsrd18572.pdf

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