6 December 2022 Low complexity partition-recombined SLM scheme for reducing PAPR in coherent optical OFDM systems
Xiangyu Liu, Qi Zhang, Xiangjun Xin, Yongjun Wang, Ran Gao, Haipeng Yao, Feng Tian, Qinghua Tian, Leijing Yang
Author Affiliations +
Abstract

High peak-to-average power ratio (PAPR) remains the main challenge of coherent optical orthogonal frequency division multiplexing (CO-OFDM) systems. Selective mapping (SLM) is a well-known effective PAPR reduction technique, but it suffers from high computational complexity. To reduce the PAPR of OFDM signals, a low-complexity, partition-recombined SLM (PRSLM) scheme is proposed. The PRSLM scheme can generate more candidate signals than that of the conventional-original SLM (COSLM) scheme. The real and imaginary components of time-domain symbols are first partitioned, and then recombined to generate new candidate signals, which reduces computational complexity significantly. A 40-GBaud single-polarization CO-OFDM transmission system is set up to evaluate the performance of the PRSLM scheme. Simulation results show that the proposed scheme achieves 61.9% reduction in complex multiplication complexity, and 60.3% reduction in addition complexity compared with the COSLM scheme when the FFT size is 128. Furthermore, the proposed scheme achieves a similar PAPR reduction performance to the COSLM scheme without bit error rate degradation. In a nutshell, the PRSLM scheme improves noise tolerance and implementation efficiency of high-speed optical communication as well as alleviates nonlinear impairments.

© 2022 Society of Photo-Optical Instrumentation Engineers (SPIE)
Xiangyu Liu, Qi Zhang, Xiangjun Xin, Yongjun Wang, Ran Gao, Haipeng Yao, Feng Tian, Qinghua Tian, and Leijing Yang "Low complexity partition-recombined SLM scheme for reducing PAPR in coherent optical OFDM systems," Optical Engineering 61(12), 126101 (6 December 2022). https://doi.org/10.1117/1.OE.61.12.126101
Received: 21 May 2022; Accepted: 21 November 2022; Published: 6 December 2022
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Cited by 1 scholarly publication.
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KEYWORDS
Orthogonal frequency division multiplexing

Spatial light modulators

Curium

Optical coherence

Calcium

Optical engineering

Signal generators

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