REDUCTION OF PEAK-TO-AVERAGE POWER RATIO IN OFDM SYSTEMS (2023)
G. Adi Lakshmi, Kasanagottu Sneha, Nallamanti Suchitha, Penta Anushika, Madipeddi Sreeja JCR. 2023: 285-292
Orthogonal Frequency Division Multiplexing (OFDM) is a widely used modulation technique in modern wireless communication systems due to its high spectral efficiency and robustness against multipath fading. However, one of the major drawbacks of OFDM systems is the high Peak-to-Average Power Ratio (PAPR) of the transmitted signal, which can lead to performance degradation and nonlinear distortion. This work presents a novel PAPR reduction scheme for OFDM systems by utilizing a companding transform. The proposed technique offers several advantages, including efficiency, signal independence, distortion-less operation, and the elimination of the need for optimization algorithms. By applying the companding transform to the OFDM signal, the dynamic range of the signal is effectively compressed, reducing the high PAPR. Simulation results demonstrate the effectiveness of the proposed companding transform-based algorithm in mitigating the PAPR issue in OFDM systems. A comparative analysis with a non-companded OFDM system reveals that the proposed scheme achieves superior performance in terms of PAPR reduction. The results indicate that the proposed algorithm can significantly enhance the performance of OFDM systems by reducing the high PAPR without introducing distortion or requiring additional optimization algorithms. Overall, this study highlights the potential of the companding transform as a promising technique for PAPR reduction in OFDM systems. The proposed algorithm offers a practical and efficient solution to address the high PAPR issue, improving the performance and reliability of OFDM-based wireless communication systems.
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