A Comparative Analysis of Techniques for PAPR Reduction of OFDM Signals

In this paper the problem of high Peak-to-Average Power Ratio (PAPR) in Orthogonal Frequency-Division Multiplexing (OFDM) signals is studied. Besides describing three techniques for PAPR reduction, SeLective Mapping (SLM), Partial Transmit Sequence (PTS) and Interleaving, a detailed analysis of the performances of these techniques for various values of relevant parameters (number of phase sequences, number of interleavers, number of phase factors, number of subblocks) depending on applied technique, is carried out. Simulation of these techniques is run in Matlab software. Results are presented in the form of Complementary Cumulative Distribution Function (CCDF) curves for PAPR of 30000 randomly generated OFDM symbols. Simulations are performed for OFDM signals with 32 and 256 subcarriers, oversampled by a factor of 4. A detailed comparison of these techniques is made based on Matlab simulation results