PAPR Suppression in OFDM Systems Using a Combination of FWFT and Nonlinear Root-Based Exponential Companding with Minimum Complexity-Reference-Cited by-同舟云学术

PAPR Suppression in OFDM Systems Using a Combination of FWFT and Nonlinear Root-Based Exponential Companding with Minimum Complexity

Published:2023-03-22 Issue: Volume: Page:
ISSN:
Container-title:
language:
Short-container-title:

Author:

Yadav Ajay Kumar¹,Prajapati Yogendra²^ORCID

Affiliation:

1. C V Raman Global University

2. Motilal Nehru National Institute of Technology

Abstract

Abstract The high peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing (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 AWGN, AGWN 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.

Publisher

Research Square Platform LLC

Reference18 articles.

1. ‘Simplified approach to optimized iterative clipping and filtering for PAPR reduction of OFDM signals’;Zhu X;IEEE Transaction on Communication

2. Taşpınar, N., & Şakir Şimşir. (Sept. 2019). and. "Dual symbol optimization-based partial transmit sequence technique for PAPR reduction in WOLA‐OFDM waveform." International Journal of Communication Systems 32, no. 14, e4081,

3. Mohammady, S., Sidek, R. M., Varahram, P., Hamidon, M. N., & Sulaiman, N. (2013). "A low complexity selected mapping scheme for peak to average power ratio reduction with digital predistortion in OFDM systems." International Journal of Communication Systems 26, no. 4, pp. 481–494, Apr.

4. Wang, X., Tjhung, T. T., & Ng, C. S. (1999). ‘‘Reduction of peak-to-average power ratio of OFDM system using a companding technique,’’ IEEE Transaction on Broadcasting, vol. 45, no. 3, pp. 303–307, Sep.

5. Jiang, T., Yang, Y., & Song, Y. H. (2005). “Exponential companding technique for PAPR reduction in OFDM systems,” IEEE Transaction on Broadcasting, vol. 51, no. 2, pp. 244–248, Jun.