OFDM Encryption Transmission System Based on PLIS (pso-logistic-ipts-slm)

In the context of the booming development of wireless communication technology today, although orthogonal frequency division multiplexing (OFDM) technology is widely used, the high peak-to-average power ratio (PAPR) issue significantly constrains its performance enhancement. This paper is dedicated to studying the OFDM transmission system based on PLIS (Particle Swarm Optimization-Logistic mapping-Improved Partial Transmit Sequence-Selected Mapping) to overcome this problem. First, this study had sorted out the relevant theories and previous achievements, and accurately located the defects of existing research in solving the PAPR problem of OFDM system. Then, the system model was constructed in detail and the research method was introduced, covering precise parameter settings and rigorous data processing procedures. Experimental results demonstrate that the proposed PLIS-based method achieves remarkable improvements in reducing PAPR, improving bit error rate and improving spectrum efficiency, and its advantages are obvious compared with traditional methods. Finally, the research findings are deeply discussed, the limitations are analyzed, the important contributions to theory and practice are explained, and the future research directions such as performance optimization under frequency-selective fading channels and algorithm hardware implementation are prospected, providing valuable reference and reference for the sustainable development of OFDM technology.