Open AccessA novel 3D constellation-masked method for physical security in hierarchical OFDMA system
Author(s) -
Lijia Zhang,
Bo Liu,
Xiangjun Xin,
Deming Liu
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.015627
Subject(s) - computer science , orthogonal frequency division multiplexing , masking (illustration) , constellation , encryption , modulation (music) , electronic engineering , computer network , telecommunications , physics , engineering , channel (broadcasting) , acoustics , art , astronomy , visual arts
This paper proposes a novel 3D constellation-masked method to ensure the physical security in hierarchical optical orthogonal frequency division multiplexing access (OFDMA) system. The 3D constellation masking is executed on the two levels of hierarchical modulation and among different OFDM subcarriers, which is realized by the masking vectors. The Lorenz chaotic model is adopted for the generation of masking vectors in the proposed scheme. A 9.85 Gb/s encrypted hierarchical QAM OFDM signal is successfully demonstrated in the experiment. The performance of illegal optical network unit (ONU) with different masking vectors is also investigated. The proposed method is demonstrated to be secure and efficient against the commonly known attacks in the experiment.