The BER Performance of the LDPC-Coded MPPM over Turbulence UWOC Channels

Jiang, Hongyan; He, Ning; Liao, Xin; Popoola, Wasiu O.; Rajbhandari, Sujan

doi:10.3390/photonics9050349

Cited by 11 publications

(7 citation statements)

References 41 publications

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“…It is vital to prioritize modulation schemes with high transmission rates or high transmission efficiency while assuring dependability [ 21 , 22 , 23 ]. Most UWOC studies have been carried out utilizing PPM, or on-off keying (OOK), as the modulation format in the water channel.…”

Section: Resultsmentioning

confidence: 99%

108 m Underwater Wireless Optical Communication Using a 490 nm Blue VECSEL and an AOM

Tian,

Wang,

Shen

et al. 2024

Sensors

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Advanced light sources in the blue-green band are crucial for underwater wireless optical communication (UWOC) systems. Vertical-external-cavity surface-emitting lasers (VECSELs) can produce high output power and good beam quality, making them suitable for UWOC. This paper presents a 108 m distance UWOC based on a 100 mW 490 nm blue VECSEL and an acousto-optic modulator (AOM). The high-quality beam, which is near diffraction-limited, undergoes relatively small optical attenuation when using a conventional avalanche photodiode (APD) as the detector and employing 64-pulse position modulation (PPM). At the time-slot frequency of 50 MHz, the bit error rate (BER) of the UWOC was 2.7 × 10−5. This is the first reported AOM-based UWOC system with a transmission distance over 100 m. The estimated maximum transmission distance may be improved to about 180 m by fully utilizing the detection accuracy of the APD according to the measured attenuation coefficient of the blue VECSEL used. This type of UWOC system, composed of a high-beam-quality light source and a conventional detector, make it more closely suited to practical applications.

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Section: Resultsmentioning

confidence: 99%

108 m Underwater Wireless Optical Communication Using a 490 nm Blue VECSEL and an AOM

Tian,

Wang,

Shen

et al. 2024

Sensors

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show abstract

“…They hold promise for underwater inspection and exploration due to their sufficient bandwidth, reliability, and cost-effectiveness. In 2022 [15], authors proposed a quasi-cyclic low-density parity-checked (QC-LDPC) code with multiple-pulse-position modulation (MPPM) to address turbulenceinduced fading in UWOC systems. MPPM offers a balance between power and bandwidth efficiency.…”

Section: Related Workmentioning

confidence: 99%

A Salinity-Impact Analysis of Polarization Division Multiplexing-Based Underwater Optical Wireless Communication System with High-Speed Data Transmission

Chaudhary,

Sharma,

Khichar

et al. 2023

JSAN

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The majority of the Earth’s surface is covered by water, with oceans holding approximately 97% of this water and serving as the lifeblood of our planet. These oceans are essential for various purposes, including transportation, sustenance, and communication. However, establishing effective communication networks between the numerous sub-islands present in many parts of the world poses significant challenges. Underwater optical wireless communication, or UWOC, can indeed be an excellent solution to provide seamless connectivity underwater. UWOC holds immense significance due to its ability to transmit data at high rates, low latency, and enhanced security. In this work, we propose polarization division multiplexing-based UWOC system under the impact of salinity with an on–off keying (OOK) modulation format. The proposed system aims to establish high-speed network connectivity between underwater divers/submarines in oceans at different salinity levels. The numerical simulation results demonstrate the effectiveness of our proposed system with a 2 Gbps data rate up to 10.5 m range in freshwater and up to 1.8 m in oceanic waters with salinity up to 35 ppt. Successful transmission of high-speed data is reported in underwater optical wireless communication, especially where salinity impact is higher.

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“…After investigating and comparing BER performance of different modulation systems, including OOK, PPM and MPPM, it was found that the UWOC performs better when applying LDPC code and MPPM instead of other modulation schemes. LPDC was also verified to be efficient in improving communication system with much better BER performance compared with BER performance of uncoded systems [7].…”

Section: Introductionmentioning

confidence: 96%

Analysis on improving channel capacity of MPPM

Ke¹

2023

HSET

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Nowadays, optical wireless communication has been widely applied and various techniques are used to achieve signals with higher quality and higher efficiency. Pulse position modulation (PPM) is a commonly used modulation scheme. However, PPM suffers from its low bandwidth efficiency and Multiple pulse position modulation (MPPM) is generated to improve the performance of signals. Further research can be carried out to figure out ways to further improve channel capacity of communication systems by combining modulation techniques together. In this paper, three different schemes are introduced, including LDPC-coded MPPM UWOC system, MIMO-MPPM WOC system, and PSM-MPPM system. Fundamental principles of these three techniques are mentioned before going through the methods used to carrying out experiments. Both simulations derived from numerical analysis and experiment results are obtained to support the results. In LDPC-coded and MIMO research, turbulence effects are considered by adopting different statistical distributions. The aim of the paper is to compare properties of three recent research and discuss how they can be applied in different scenarios to improve the communication systems.

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The BER Performance of the LDPC-Coded MPPM over Turbulence UWOC Channels

Cited by 11 publications

References 41 publications

108 m Underwater Wireless Optical Communication Using a 490 nm Blue VECSEL and an AOM

108 m Underwater Wireless Optical Communication Using a 490 nm Blue VECSEL and an AOM

A Salinity-Impact Analysis of Polarization Division Multiplexing-Based Underwater Optical Wireless Communication System with High-Speed Data Transmission

Analysis on improving channel capacity of MPPM

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