Concurrent performance and security enhancement of ultrahigh-order DSM signals via null subcarriers

In this paper, we propose leveraging null subcarriers in discrete multi-tone modulation (DMT) to process the DMT signal in both time and frequency domains. Additionally, we employ discrete memory enhanced chaos (DMEC) to scramble the signal in the frequency domain, thereby achieving physical layer signal encryption while ensuring a more uniform power distribution in the time-domain waveform. In our experimental demonstration, we achieved high-security transmission of a DSM-based 65536-QAM signal at a data rate of 16.01 Gb/s over a 25 km single-mode fiber (SMF) in an intensity-modulation direct-detection (IMDD) system. Additionally, in the transmission experiments for 13684-QAM and 65536-QAM signals, the proposed method demonstrated a receiver sensitivity gain of over 0.5 dB compared to the traditional DSM-based ultrahigh-order transmission.

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Publication Details

Journal
Optics Letters
Published
2024-08-05
DOI
https://doi.org/10.1364/ol.535317
Primary Topic
Optical Network Technologies
Type
article
Field-Weighted Citation Impact
0.00

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article

Concurrent performance and security enhancement of ultrahigh-order DSM signals via null subcarriers

Jianxin Ren, Lilong Zhao, 清 田中, Xiumin Song et al.
Optics Letters
Optical Network Technologies
article

Concurrent performance and security enhancement of ultrahigh-order DSM signals via null subcarriers

Jianxin Ren, Lilong Zhao, 清 田中, Xiumin Song, Yaya Mao, Shuaidong Chen, Haojun Liu, Ying Li, Xiangyu Wu, Jianye Zhao, Bo Liu
article en

Abstract

In this paper, we propose leveraging null subcarriers in discrete multi-tone modulation (DMT) to process the DMT signal in both time and frequency domains. Additionally, we employ discrete memory enhanced chaos (DMEC) to scramble the signal in the frequency domain, thereby achieving physical layer signal encryption while ensuring a more uniform power distribution in the time-domain waveform. In our experimental demonstration, we achieved high-security transmission of a DSM-based 65536-QAM signal at a data rate of 16.01 Gb/s over a 25 km single-mode fiber (SMF) in an intensity-modulation direct-detection (IMDD) system. Additionally, in the transmission experiments for 13684-QAM and 65536-QAM signals, the proposed method demonstrated a receiver sensitivity gain of over 0.5 dB compared to the traditional DSM-based ultrahigh-order transmission.

Optics LettersVol. 49(16)
Beijing University of Posts and Telecommunications (CN), Sun Yat-sen University (CN), Nanjing University of Information Science and Technology (CN), Institute of Electronics (CN), Institute of Optics and Electronics, Chinese Academy of Sciences (CN)
National Natural Science Foundation of China, Jiangsu Provincial Key Research and Development Program, National Key Research and Development Program of China
Openalex Percentile: Top 90%
Optical Network Technologies
DOISourceOpenAlex
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Concurrent performance and security enhancement of ultrahigh-order DSM signals via null subcarriers — Jianxin Ren, Lilong Zhao, et al. · Optics Letters (2024) | TGRS Research Map | TGRS