Hiding stealth optical CDMA signals in public BPSK channels for opticalwireless communication

Chih Ta Yen, Jen-Fa Huan, Wen Zong Zhang

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A new optical steganography scheme is proposed that transmits a stealth optical code-division multiple-access (OCDMA) signal through a public binary phase-shift keying (BPSK) channel. Polarization beam splitters and arrayed waveguide gratings are used to implement a spectral-polarization coding (SPC) system with an incoherent optical source. We employ a Walsh-Hadamard code as the signature code of the user who wants to transmit stealth information using the system. A free space optical link applied to this system maintains the polarization states of light during propagation. The secret data are extracted using correlation detection and balanced subtraction in the OCDMA decoder of the intended receiver, and the other signal from the public channel is reduced by the OCDMA decoder. At the demodulator of the public channel, BPSK demodulation eliminates the stealth signal so that the public channel is not affected by the stealth signal. The two signals cannot interfere with each other. The results of this study show that our proposed optical steganography system is highly secure. The stealth signal can be favorably hidden in the public channel when the average source power of the stealth signal, public noise, and public signal are -5, -3, and 0 dBm, respectively.

Original languageEnglish
Article number1731
JournalApplied Sciences (Switzerland)
Volume8
Issue number10
DOIs
Publication statusPublished - 2018 Sep 25

Fingerprint

binary phase shift keying
Binary phase shift keying
code division multiple access
Code division multiple access
Steganography
communication
Polarization
Communication
Arrayed waveguide gratings
Light propagation
Demodulators
Optical links
Demodulation
Light sources
decoders
polarization
correlation detection
steganography
demodulators
demodulation

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Instrumentation
  • Engineering(all)
  • Process Chemistry and Technology
  • Computer Science Applications
  • Fluid Flow and Transfer Processes

Cite this

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abstract = "A new optical steganography scheme is proposed that transmits a stealth optical code-division multiple-access (OCDMA) signal through a public binary phase-shift keying (BPSK) channel. Polarization beam splitters and arrayed waveguide gratings are used to implement a spectral-polarization coding (SPC) system with an incoherent optical source. We employ a Walsh-Hadamard code as the signature code of the user who wants to transmit stealth information using the system. A free space optical link applied to this system maintains the polarization states of light during propagation. The secret data are extracted using correlation detection and balanced subtraction in the OCDMA decoder of the intended receiver, and the other signal from the public channel is reduced by the OCDMA decoder. At the demodulator of the public channel, BPSK demodulation eliminates the stealth signal so that the public channel is not affected by the stealth signal. The two signals cannot interfere with each other. The results of this study show that our proposed optical steganography system is highly secure. The stealth signal can be favorably hidden in the public channel when the average source power of the stealth signal, public noise, and public signal are -5, -3, and 0 dBm, respectively.",
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Hiding stealth optical CDMA signals in public BPSK channels for opticalwireless communication. / Yen, Chih Ta; Huan, Jen-Fa; Zhang, Wen Zong.

In: Applied Sciences (Switzerland), Vol. 8, No. 10, 1731, 25.09.2018.

Research output: Contribution to journalArticle

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