Scholarlink

<p>In recent years, the demand for upgraded spectral efficiency and reduced power consumption has grown significantly. Therefore, Orthogonal frequency division multiplexing (OFDM) helps as a core transmission technology in 5G/6G communication systems. The high peak-to-average power ratio (PAPR) of OFDM system is a major drawback. To tackle this, we recommend a neoteric scheme which is associated with a combination of fast Walsh-Hadamard and Fourier transform (FWFT) of low computing complexity and nonlinear root-based exponential companding (REC). The FWF-transform is being obtained by cascading Walsh-Hadamard transform (WHT) and Fourier transform. The WHT is a linear precoder that distorts phase to somewhat mitigate PAPR. In addition to that, the REC scheme is introduced to further minimize PAPR by adjusting companding parameters. By knowing that conventional exponential companding (EC) increases the low amplitude signals and does not influence high peaks of OFDM signals appropriately. Though, REC scheme does not only compress high amplitudes but also enlarges low amplitudes of the OFDM system simultaneously. Correspondingly, PAPR of the OFDM system reduces. In comparison to any of the other existing schemes, our proposed scheme (FWFT-REC) preserves bit error rate (BER) performance over additive white Gaussian noise (AWGN), AWGN with solid-state power amplifier (SSPA), and multipath Rayleigh fading channels at the same BER while suppressing PAPR up to 2.10 dB for QPSK at the same complementary cumulative distribution function (CCDF) = 10<sup>− 3</sup>.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

PAPR Suppression in OFDM Systems using Combination of FWFT and Nonlinear Root-based Exponential Companding with Minimum Complexity for 5G/6G Applications

  • 期刊论文

  • 发表日期：

    2026年7月19日

查看全文
  • Ajay Kumar Yadav,
  • Yogendra Kumar Prajapati

摘要

In recent years, the demand for upgraded spectral efficiency and reduced power consumption has grown significantly. Therefore, Orthogonal frequency division multiplexing (OFDM) helps as a core transmission technology in 5G/6G communication systems. The high peak-to-average power ratio (PAPR) of OFDM system is a major drawback. To tackle this, we recommend a neoteric scheme which is associated with a combination of fast Walsh-Hadamard and Fourier transform (FWFT) of low computing complexity and nonlinear root-based exponential companding (REC). The FWF-transform is being obtained by cascading Walsh-Hadamard transform (WHT) and Fourier transform. The WHT is a linear precoder that distorts phase to somewhat mitigate PAPR. In addition to that, the REC scheme is introduced to further minimize PAPR by adjusting companding parameters. By knowing that conventional exponential companding (EC) increases the low amplitude signals and does not influence high peaks of OFDM signals appropriately. Though, REC scheme does not only compress high amplitudes but also enlarges low amplitudes of the OFDM system simultaneously. Correspondingly, PAPR of the OFDM system reduces. In comparison to any of the other existing schemes, our proposed scheme (FWFT-REC) preserves bit error rate (BER) performance over additive white Gaussian noise (AWGN), AWGN with solid-state power amplifier (SSPA), and multipath Rayleigh fading channels at the same BER while suppressing PAPR up to 2.10 dB for QPSK at the same complementary cumulative distribution function (CCDF) = 10− 3.