MATLAB Implementation of SLM Algorithm for OFDM System

In OFDM systems, reducing the Peak-to-Average Power Ratio (PAPR) - the ratio between the peak power and average power of the signal - is crucial for system performance. We employ the Selective Mapping Algorithm (SLM), which effectively minimizes PAPR by generating multiple candidate signals with different phase sequences and selecting the one with the lowest PAPR for transmission. The provided MATLAB source code implements this algorithm through several key functions. The implementation includes OFDM signal generation with IFFT operations, phase sequence generation using random phase factors, PAPR calculation using complementary cumulative distribution function (CCDF) analysis, and candidate signal selection based on minimum PAPR criteria. The code demonstrates how to apply SLM in OFDM systems to achieve improved signal transmission quality by reducing signal distortion and improving power amplifier efficiency. The implementation features configurable parameters including number of subcarriers, modulation scheme selection, number of candidate signals, and phase rotation options, allowing researchers to optimize the algorithm for different OFDM system configurations.