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Low-complexity PAPR reduction scheme selective mapping cascading improved μ Law companding in CO-OFDM system

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Abstract

In this paper, a hybrid technique using a low complexity selective mapping (LCSLM) cascading an improved μ law companding scheme (LCSLM-μ) is proposed to reduce the peak-to-average power ratio (PAPR) and complexity in coherent optical orthogonal frequency division multiplexing system. The simulation results show that at the complementary cumulative distribution function of \({10}^{{ - 4}}\), the PAPRs of the scheme LCSLM-μ(D = 4,m = 3,\(\mu { = 1}\)) are optimized by 1.488 dB and 1.166 dB compared those of LCSLM (D = 4) and companding(\(\mu { = 1}\)) schemes, respectively. Meanwhile, when the bit error rate (BER) is 10–3, the optical signal to noise ratios (OSNRs) of the LCSLM-μ(D = 4,m = 3,\(\mu { = 1}\)) scheme are optimized by 6.61 dB and 7.31 dB compared with those of companding (\(\mu { = 1}\)) and improved \(\mu\) law companding (m = 3, μ = 1) schemes, respectively. The computational complexity and PAPR reduction performance of various schemes, such as traditional SLM, LCSLM, improved law companding and LCSLM-μ schemes are analyzed respectively. The simulation results show that the LCSLM-\(\mu\) (D = 4, m = 3, μ = 1)provides better PAPR reduction performance. When the alternative signal is 16, compared with the traditional SLM algorithm, the LCSLM-\(\mu\)(D = 4, m = 3, \(\mu { = 1}\)) scheme reduces the computational complexity of complex addition and complex multiplication by 53.1% and 45%, respectively. This paper provides a choice for a trade-off among PAPR reduction, BER and reduced complexity.

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Funding

This work is supported by the National Youth Foundation of China [Grant Number 11704283]; Natural Science Foundation of Tianjin City [Grant Number 18JCYBJC86300].

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Correspondence to Zhengrong Tong.

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Li, T., Tong, Z., Zhang, W. et al. Low-complexity PAPR reduction scheme selective mapping cascading improved μ Law companding in CO-OFDM system. Wireless Pers Commun 122, 861–876 (2022). https://doi.org/10.1007/s11277-021-08929-8

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