Enhancing PAPR in OFDM System Using Polar Codes and μ-Law Companding with Adaptive Modulation and Coding Rates

Abstract

Orthogonal Frequency Division Multiplexing (OFDM) is a widely used modulation technique, but it has a high Peak-to-Average Power Ratio (PAPR), which can cause problems for power amplifiers. To address this challenge, a new algorithm is proposed that incorporates Polar codes and μ-law companding. The algorithm is shown to significantly reduce PAPR and Bit Error Rate (BER) with Quadrature Amplitude Modulation (QAM) and two coding rates, 1/2 and 5/6. The proposed method is also flexible and adaptive, allowing for changes in modulation schemes, coding rates, and μ-law values. Further research will explore the use of an Auto Encoder (AE) network system to optimize these parameters.