Performance enhancement of 112 Gbps UWOC link by mitigating the air bubbles induced turbulence with coherent detection MIMO DP-16QAM and advanced digital signal processing

Singh, Mandeep; Singh, Maninder; Singh, Rajandeep

doi:10.1016/j.ijleo.2022.168986

Cited by 11 publications

(8 citation statements)

References 28 publications

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“…amplifies and digitizes (demodulation) the received signal for further processing (decoding) in Matlab. The figure shows that the BCH (31,16) and BCH (31,11) codes perform comparably well until the communication link range of about 2 m, illustrating their suitability for small underwater LANs. Although the two schemes have an almost similar computational complexity, as shown in figure 16, BCH (31,16) is preferred for SMP applications because it has more message bits (higher code-word rate) than BCH (31,11).…”

Section: Resultsmentioning

confidence: 93%

“…Robust real-time underwater audio and video streaming is implemented using wireless optical communication for underwater uses [14], [15]. Furthermore, UWOC is established for realtime marine observation, diver communication, and ocean monitoring [16]- [18].…”

Section: Literature Reviewmentioning

confidence: 99%

“…The coefficients of the code-word polynomials are modulated with the LED source, and the modulated optical beam is communicated through the underwater columns using a plano-convex collimating lens.The LFSR architecture for BCH (31,16) encoding, obtained using the generator polynomial g(x) = x 15 + x 11 + x 10 + x 9 + x 8 + x 7 + x 5 + x 3 + x 2 + x + 1, is illustrated in figure 7.…”

Section: A Bch (31 16) Encodermentioning

confidence: 99%

“…Considering the node design constraints, mobility requirement, and the limitation of the processing power of the MCU, a triple-error-correcting binary BCH (31,16)…”

Section: Software Implementationmentioning

confidence: 99%

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Experimental Demonstration and Evaluation of BCH-Coded UWOC Link for Power-Efficient Underwater Sensor Nodes

2022

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Mobile nodes can encounter many challenges in underwater environments during communication due to turbidity, suspended particles, small bubbles, and turbulence. These factors cause absorption and scattering, ultimately corrupting optical signals. Error-correcting codes can be used to correct certain corrupted bits and thus reduce the errors in a channel. In this work, a Bose-Chaudhuri-Hocquenghem (BCH) (31, 16)-coded underwater wireless optical communication (UWOC) system is proposed to enhance the communication performance between power-efficient sensor nodes. The proposed BCH-coded system needs a reasonable amount of computing capability and is powered by a battery, enabling the node to have an onsite data processing unit and untethered communication. The encoder and decoder algorithms of the BCH code are implemented on the Embedded C software and coded to run on an Atmel ATmega128A microcontroller. The system's performance is evaluated by emulating the effects of scattering and absorption, noise due to surrounding and ambient light, turbidity, air bubbles, and turbulence in a natural underwater environment. Moreover, a 0.5 Mbps BCH-coded link achieves a 93.5% PSR, which is 6% better than that of the uncoded system, at a moderate turbidity level of 64 NTU, in the presence of weak turbulence (induced by a pump at a 2.5 L/min displacement rate) and air bubbles (generated by an aerating jet at an airflow rate of about 1.2 L/min).

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Section: Resultsmentioning

confidence: 93%

Section: Literature Reviewmentioning

confidence: 99%

Section: A Bch (31 16) Encodermentioning

confidence: 99%

“…Considering the node design constraints, mobility requirement, and the limitation of the processing power of the MCU, a triple-error-correcting binary BCH (31,16)…”

Section: Software Implementationmentioning

confidence: 99%

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Experimental Demonstration and Evaluation of BCH-Coded UWOC Link for Power-Efficient Underwater Sensor Nodes

2022

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“…The output signal from the PD is directed to a low pass filter (LPF) to reject the unwanted signal frequencies. A BER analyzer is used to characterize the signal quality.The electrical current at the PD output in the case of PV code, I PD , is given by (Singh et al 2022a(Singh et al , 2022b):…”

Section: Proposed Uwoc-ocdma Modelmentioning

confidence: 99%

OCDMA transmission-based underwater wireless optical communication system: performance analysis

et al. 2023

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This paper introduces a novel underwater (UW) optical communication system that utilizes optical code division multiple access transmission technique using the permutation vector code. Three scenarios of water are considered, pure sea (PS), clear ocean (CL), and coastal ocean (CO). The performance is evaluated analytically in terms of bit error rate (BER), received power, signal to noise ratio for different UW links and data rates. The results show that the shortest UW range is achieved in the case of CO, achieving the highest extinction ratio compared to CL and PS. Considering a BER below the forward error correction (FEC) limit of 3 × $${10}^{-3}$$ 10 - 3 , the maximum UW ranges reached are 21 m for PS, 12 m for CL, and 8 m for CO at 3 Gbps with 20 dBm transmitted power. The propagation range could be increased when the transmitted power is increased to 25 dBm, achieving the ranges of 31 m, 18 m, and 9 m, for PS, CL, and CO, respectively.

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Investigations on spectrum sliced-wavelength-division multiplexed visible light communication transmission for underwater links under varying turbulent conditions

Janarthanan

Gauni

2022

Opt Quant Electron

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Performance enhancement of 112 Gbps UWOC link by mitigating the air bubbles induced turbulence with coherent detection MIMO DP-16QAM and advanced digital signal processing

Cited by 11 publications

References 28 publications

Experimental Demonstration and Evaluation of BCH-Coded UWOC Link for Power-Efficient Underwater Sensor Nodes

Experimental Demonstration and Evaluation of BCH-Coded UWOC Link for Power-Efficient Underwater Sensor Nodes

OCDMA transmission-based underwater wireless optical communication system: performance analysis

Investigations on spectrum sliced-wavelength-division multiplexed visible light communication transmission for underwater links under varying turbulent conditions

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