PAPR Reduction an effective approach for next frontier MIMO-OFDM systems

Abstract

The ‘Orthogonal frequency division multiplexing (OFDM)’ is one of the well-accepted and effective technologies employed today and futures wireless telecommunication systems. The OFDM and ‘multiple-input multiple-output (MIMO’) combinations offer high spectral efficiency and throughput in wireless communication systems. The multicarrier OFDM suffers from a high ‘peak-to-average power ratio (PAPR’). The high PAPR value is the major issue in the OFDM scheme and must be reduced to the desired level for trustworthy communication. Due to high PAPR signal amplification is nonlinear which results in loss of orthogonality and there will be severe ‘inter-carrier interference (ICI)’.  In this article, the minimization of the PAPR of the OFDM system is portrayed using ‘iterative clipping and filtering (ICF)’ and ‘selective mapping (SLM)’ schemes.  The simulated result shows that the proposed ICF technique is more suitable for minimizing the PAPR effectively without affecting BER much and the simplicity of the system. For simulation, MATLAB tool is used and clipping ration up to 6 with ‘Quadrature amplitude modulation (QPSK)’’ is considered.