Yang Ye, Chen Chen, Zhihong Zeng, Dengke Wang, Harald Haas
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Diversity-enhanced multicarrier transmission for secure, band-limited, and turbulent UOWC systems.
Low-pass band limitation and turbulence are two critical issues faced by practical underwater optical wireless communication (UOWC) systems. In this Letter, we propose an orthogonal frequency division multiplexing (OFDM)-based diversity-enhanced multicarrier (D-MC) scheme for joint mitigation of low-pass band limitation and turbulence issues in UOWC systems. The OFDM-based D-MC scheme is realized by performing diversity transmission in both the frequency and time domains during OFDM modulation. Moreover, to enhance the security of OFDM-based D-MC transmission, a two-stage chaotic encryption scheme is further proposed which includes chaotic phase rotation and chaotic scrambling. Experimental results show that OFDM-based D-MC with 2D diversity can achieve a substantial 69.9% usable bandwidth extension compared with the conventional scheme without diversity.
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The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community.
Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.
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