Wave optics simulation investigation of multiple-input and aperture-averaging for optical wave propagation in turbulent ocean.

Multiple-input single-output (MISO) have extraordinary propagation properties, making it possible to further improve the performance of underwater wireless optical communication (UWOC). In this paper, a tilted MISO-UWOC system consists of a beam array and an aperture averaged detector, academically called multiple-input aperture-average (MIAA) systems, are proposed. Different from the original approach where beams are parallel to each other, the tilted approach has a series of multiple beam transmitters individually aimed at the receiver. The MIAA systems are extensively compared to single-input single-output (SISO) systems on scintillation index and SNR for various oceanic turbulence conditions and system configurations by wave optics simulation (WOS). Our results reveal that tilted MIAA systems show tremendous advantages over the parallel MIAA systems including the reduced scintillation and the improved signal to noise ratio (SNR) under the same configuration. The obtained results can be useful for the UWOC system design. [ABSTRACT FROM AUTHOR]