Performance Investigation of OAMSK Modulated Wireless Optical System Over Turbulent Ocean Using Convolutional Neural Networks

Wang, Wei; Wang, Ping; Guo, Lixin; Pang, Weina; Chen, Wenwen; Li, Ang; Han, Maojie

doi:10.1109/jlt.2019.2958413

Cited by 28 publications

(11 citation statements)

References 61 publications

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“…Our Paper 2013 [18] 2015 [15] 2016 [19] 2017 [20] 2019 [21] 2019 [16] 2020 [17] 2020 [12] Channel Model Gauss term, where w (0) is the beam waist, z R = πw (0) 2 /λ is the Rayleigh range, and…”

Section: Novelty and Related Workmentioning

confidence: 99%

“…This technique can be realized by the popular split-step Fourier propagation based on multiple phase-screen models [10], while relying on the average of these random samples generated by Monte-Carlo simulations. Recently, multiple phase screen models based on the power spectrum inversion method of [11] have been applied for underwater turbulence channels [12]. However, the rules of incorporating phase screens are not wellestablished and each screen is independent.…”

mentioning

confidence: 99%

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Channel Modeling for Orbital Angular Momentum Based Underwater Wireless Optical Systems

Zhu

Yao

Wang

et al. 2022

IEEE Trans. Veh. Technol.

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The underwater turbulence channel is modelled and a unified statistical distribution is applied for characterizing orbital angular momentum (OAM) propagation in underwater wireless optical communication (UWOC) systems. Based on Monte-Carlo simulations, the effects of turbulences are characterized by the multiple phase screens model considering both the coherence width and scintillation index. The phase screen samples are processed by the randomized spectral sampling discrete Fourier transform (DFT) technique. To validate the propagated field distribution, both the phase structure function and optical transfer function are derived and evaluated with the aid of ensemble-averaged results. The Generalized Gamma Distribution (GGD) enriched by an additional independent parameter is applied for modelling the probability density function (PDF) of both the reference-channels, fluctuating irradiance as well as the intermodal crosstalk irradiance between different OAM modes. Furthermore, based on the PDF, the performance metrics of both single input multiple output (SISO) and multiple input multiple output (MIMO) systems are analyzed, based on the average capacity, the bit-error rate and the outage probability.

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Section: Novelty and Related Workmentioning

confidence: 99%

mentioning

confidence: 99%

Channel Modeling for Orbital Angular Momentum Based Underwater Wireless Optical Systems

Zhu

Yao

Wang

et al. 2022

IEEE Trans. Veh. Technol.

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“…Many applications in spacedivision multiplexing, optical sensing, and tracking are possible with this method [31]. These cameras were used in OAM-SK underwater wireless optical communication (UWOC) systems in oceanic turbulence channels [32]. The wave front distortion of optical beams induced by atmospheric turbu-lence is measured using CCD cameras in low-frequency heterodyne interferometry [33].…”

Section: Multiple Vf Transmission Through the Proposed Systemmentioning

confidence: 99%

Performance Analysis of 3D Video Transmission Over Deep-Learning-Based Multi-Coded N-ary Orbital Angular Momentum FSO System

et al. 2021

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Orbital angular momentum-shift keying (OAM-SK), which is the rapid switching of OAM modes, is vital but seriously impeded by the deficiency of OAM demodulation techniques, particularly when videos are transferred over the system. Thus, in this paper, 3D chaotic interleaved multi-coded video frames (VFs) are conveyed via an N-OAM-SK free space optic (FSO) communication system to enhance the reliability and efficiency of the model. To tackle the defects of the OAM-SK-FSO mechanism, two efficient deep learning (DL) techniques, namely convolution recurrent neural network (CRNN) and 3D convolution neural network (3DCNN) are used to decode OAM modes with a lower BER. Moreover, a graphics processing unit (GPU) is used to accelerate the training process with slight power consumption. The utilized datasets for OAM states are generated by applying different scenarios using trial and error method. The simulation results imply that LDPC coded VFs achieve the greatest peak signal-to-noise ratios (PSNRs) and the lowest BERs using the 16-OAM-SK model. Both 3DCNN and CRNN techniques have nearly the same performance, but this performance deteriorates in the case of larger dataset classes. Moreover, the GPU accelerates the performance by almost 67.6% and 36.9% using CRNN and 3DCNN techniques, respectively. These two DL techniques are more effective in evaluating the classification accuracy than the other traditional techniques by almost 10 − 20%.

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“…In 2004, Gibson demonstrated the transfer of information encoded as OAM modes of a light beam using computer-generated fork phase grating 21 . Since then, lots of works employing vortex beams for data coding/decoding transmission have been demonstrated in free-space, optical fiber and underwater link 22 – 27 . In theory, the OAM states are theoretically infinite, making it feasible to realize high-dimensional coding/decoding for data transfer in both traditional and quantum communications.…”

Section: Introductionmentioning

confidence: 99%

Experimental demonstration of multiple dimensional coding decoding for image transfer with controllable vortex arrays

Zhu

Wang

Deng

et al. 2021

Sci Rep

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Vortex beams carrying orbital angular momentum (OAM), which featuring helical phase front, have been regarded as an alternative spatial degree of freedom for optical mode coding and multiplexing. For most reported OAM-based mode coding schemes, data information is only encoded by different OAM mode states. In this paper, we introduce a novel design technique to construct vortex array phase grating (VAPGs) for the flexible generation of vortex arrays, and employ the proposed VAPGs to realize multi-dimensional space/mode/amplitude coding/decoding. By designing VAPGs with different parameters and loading them on to a single spatial light modulator (SLM), we successfully generate vortex array with different mode states and relative power in the experiments. Moreover, a 10-bit multi-dimensional space/mode/amplitude data coding/decoding scheme for image transfer in free-space link with a zero bit-error-rate is experimentally demonstrated, which confirm the feasibility of our proposed VAPG-based coding/decoding scheme.

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Performance Investigation of OAMSK Modulated Wireless Optical System Over Turbulent Ocean Using Convolutional Neural Networks

Cited by 28 publications

References 61 publications

Channel Modeling for Orbital Angular Momentum Based Underwater Wireless Optical Systems

Channel Modeling for Orbital Angular Momentum Based Underwater Wireless Optical Systems

Performance Analysis of 3D Video Transmission Over Deep-Learning-Based Multi-Coded N-ary Orbital Angular Momentum FSO System

Experimental demonstration of multiple dimensional coding decoding for image transfer with controllable vortex arrays

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