Open AccessRobust chaotic-shift-keying scheme based on electro-optical hybrid feedback system
Author(s) -
Xiaojing Gao,
Mengfan Cheng,
Lei Deng,
Minming Zhang,
Songnian Fu,
Deming Liu
Publication year - 2020
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.389251
Subject(s) - chaotic , robustness (evolution) , computer science , keying , bit error rate , control theory (sociology) , noise (video) , electronic engineering , telecommunications , engineering , artificial intelligence , biochemistry , chemistry , channel (broadcasting) , control (management) , image (mathematics) , gene
A chaotic-shift-keying (CSK) scheme is designed based on a chaos system with electro-optical hybrid time delayed feedback structure. By switching the time delay parameter as a message feeding method, the generated chaotic signal is no longer suffered from return map attack, which is an innate vulnerability of traditional CSK. When the coupling of the seed electrical chaotic system and the nonlinear optical time delay feedback loop is carefully weighed, this CSK scheme shows a good robustness in terms of handling noise for transmitting digital signals. By demodulating the digital signals with the chaotic coherent detection method, a bit error rate of 6×10 -4 is achieved at the signal-to-noise ratio of 10dB in the simulation. The proposed method has a promising application prospect in some harsh environments.