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Ultrahigh-order QAM secure transmission based on delta-sigma modulation using discrete memristive-enhanced chaos

Jianye Zhao, Jianxin Ren, Bo Liu, Yaya Mao, Xiangyu Wu, Shuaidong Chen, Yongfeng Wu, Xiuming Song, and Lilong Zhao

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Abstract

This Letter proposes a high-security and high-order signal transmission method that is based on delta-sigma modulation (DSM) and discrete memristive-enhanced chaos (DMEC). We employ the DMEC for the encryption of DSM signals to achieve a key space of 1098 in size. Moreover, we demonstrated a high-security transmission of 16384QAM signals using the DSM over a 25 km single-mode fiber in the intensity-modulated direct detection (IMDD) system. The experimental results show that the proposed ultrahigh-order transmission scheme based on DMEC and DSM guarantees high signal transmission performances with improved security and a key sensitivity level of 10−17.

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Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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