Proposed Different Signal Processing Tools for Efficient Optical Wireless Communications

Ibrahim, Hend; Algarni, Abeer D.; Abdalla, Mahmoud I.; El‐Shafai, Walid; El‐Samie, Fathi E. Abd; Soliman, Naglaa F.

doi:10.32604/cmc.2022.022436

Cited by 3 publications

(1 citation statement)

References 23 publications

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“…A set of eight ISSR and four SCoT primers (Integrated DNA Technologies, Inc, USA) were used to estimate genetic diversity among the studied varieties (Table 4). The PCR reactions was carried out in 25 µl reaction volume containing 12.5 µl Master Mix (sigma), 2.5 µl ISSR/SCoT primers (10pcmol), 3 µl template DNA (10ng) and 7 µl dH 2 O, according to Ibrahim et al, 39 . PCR ampli cation was performed using a Perkin-Elmer/GeneAmp® PCR System 9700 (PE Applied Biosystems).…”

Section: Issr and Scot Primers And Pcr Ampli Cationmentioning

confidence: 99%

Genetic diversity Analysis using molecular markers of some rice varieties for Physiological, biochemical and yield Traits under water deficit condition

El-Aty

Abo-Youssef

Bahgt

2023

Preprint

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Rice is a major staple food crop all over the world. Recent climate change trends forecast an increase in drought severity, necessitating the creation of novel drought-tolerant rice cultivars in order to continue rice production in this ecosystem. This study was carried out at the experimental farm of the rice research and training center (RRTC) using the randomized complete block design (RCBD) to assess the impact of water scarcity on eight rice varieties by identifying differences in physiological and biochemical responses among drought-sensitive and resistant rice varieties, in addition applying two PCR-based molecular marker systems ISSR and SCoT to assess the genetic diversity among the studied rice varieties. The results revealed that, Water shortage stress significantly reduced relative water content, total chlorophyll content, grain yield, and yield characteristics. while, it significantly raised proline content and antioxidant enzyme activity (CAT, APX, and SOD). The combined analysis of variance demonstrated that the mean squares for environments, varieties, and their interaction were highly significant for all investigated traits, suggesting that the germplasm used in the study had significant genetic diversity from one environment (normal irrigation) to another (water deficit) and could rank differently in both of them. Mean performance data showed that, Puebla and Hispagran varieties were selected as the most favourable varieties for most physiological and biochemical parameters studied, as well as yield traits which recorded the highest desirable values under both irrigation treatments. They were recommended for use in rice hybrid breeding programmes for water scarcity tolerance. Genetic Similarity and Cluster Analysis revealed that, the both molecular markers exhibited comparable genetic diversity values but a higher level of polymorphism was represented by ISSR. This indicates the high efficiency of both markers in discriminating the tested varieties. The dendrogram generated by ISSR and SCoT markers combined data divided the varieties into two major clusters. Cluster I consisted of the genotype Sakha 106. Cluster II retained seven varieties, which were further divided into two sub-clusters; Sakha 101, Sakha 105, Sakha 106, Sakha 107 constituted the first subgroup, while Giza 177, Hispagran, and Puebla formed the second one.

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Section: Issr and Scot Primers And Pcr Ampli Cationmentioning

confidence: 99%

Genetic diversity Analysis using molecular markers of some rice varieties for Physiological, biochemical and yield Traits under water deficit condition

El-Aty

Abo-Youssef

Bahgt

2023

Preprint

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Simulation analysis of underwater wireless optical communication based on Monte Carlo method and experimental research in complex hydrological environment

et al. 2023

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This paper aims to address the challenges of short optical communication distances and high Bit Error Rates (BERs) caused by seawater absorption, scattering, and underwater turbulence. This paper establishes an optical communication channel model based on the Monte Carlo method and simulates and analyzes the process of received optical power attenuation when light is transmitted underwater due to absorption and scattering. The simulation model focuses on the influence of seawater type, transmission distance, receiver position, and angle on the received optical power attenuation. The results of this simulation will provide theoretical support for the development of prototype underwater optical communication systems and experiments in complex environments. To solve the long-range weak signal reception and processing issues in underwater optical wireless communication systems, this paper proposes the design and implementation of an underwater optical wireless communication system using optimized on-off keying high-power light-emitting diode/laser diode modulation technology and avalanche photodiode (APD)/photomultiplier (PMT) receiver modules. In addition, this paper describes the design of the underwater optical communication host computer software, which provides functions such as mode selection, BER monitoring, and file transfer. To test the performance of the proposed system, this paper conducts experiments in a 35 m long pool, fixed platform, and underwater mobile platform, as well as cross-air-water interface optical communication performance test experiments in a complex hydrological environment. The results show that the system achieved a 35 m underwater medium communication distance, transmission rate of 5–20 Mbps, and cross-domain wireless optical communication function under the condition of a BER of less than 10−6. The experiments also revealed that the communication distance decreases as the turbidity of the water body increases and the PMT receiver module selected at the receiver end has a longer communication distance than the APD receiver module. Overall, this paper demonstrates the feasibility of the proposed technology for underwater optical communication systems in complex waters, providing theoretical and data support for the next engineering practice.

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Improved Aggregated Rate for Optical Orthogonal Frequency Division Multiplexing (IARO-OFDM) for Intensity Modulated and Direct Detection of VLC Deployment over 6G Networks

Farid

Saleh

El-Badawy

et al. 2022

2022 39th National Radio Science Conference (NRSC)

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Proposed Different Signal Processing Tools for Efficient Optical Wireless Communications

Cited by 3 publications

References 23 publications

Genetic diversity Analysis using molecular markers of some rice varieties for Physiological, biochemical and yield Traits under water deficit condition

Genetic diversity Analysis using molecular markers of some rice varieties for Physiological, biochemical and yield Traits under water deficit condition

Simulation analysis of underwater wireless optical communication based on Monte Carlo method and experimental research in complex hydrological environment

Improved Aggregated Rate for Optical Orthogonal Frequency Division Multiplexing (IARO-OFDM) for Intensity Modulated and Direct Detection of VLC Deployment over 6G Networks

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