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Journal articles on the topic 'OPTICAL CODING TECHNIQUES'

Author: Grafiati

Published: 11 September 2023

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1

Kaur, Simarpreet, and Simranjit Singh. "Review on developments in all-optical spectral amplitude coding techniques." Optical Engineering 57, no. 11 (2018): 1. http://dx.doi.org/10.1117/1.oe.57.11.116102.

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2

Mruthyunjaya, H. S. "BPPM optical WDM systems with error control coding techniques on BAC." International Journal of Electronics 95, no. 10 (2008): 1093–101. http://dx.doi.org/10.1080/00207210802354866.

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3

Yang, C. P., S. H. Lin, M. L. Hsieh, K. Y. Hsu, and T. C. Hsieh. "A Holographic Memory for Digital Data Storage." International Journal of High Speed Electronics and Systems 08, no. 04 (1997): 749–65. http://dx.doi.org/10.1142/s0129156497000317.

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A read-only holographic memory for digital data storage is experimentally demonstrated. Techniques for coding and decoding of optical signals, and the interface techniques between the optical memory and a personal computer are described. The performance of the optical memory and the techniques for improving the bit error rate (BER) are presented.

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4

Llados-Bernaus, Ramon, and Robert L. Stevenson. "Edge-assisted upper band coding techniques." International Journal of Imaging Systems and Technology 10, no. 1 (1999): 67–75. http://dx.doi.org/10.1002/(sici)1098-1098(1999)10:1<67::aid-ima8>3.0.co;2-1.

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5

Abdelaziz, Mohamed, and Essam Abdellatef. "Coded DCO-OFDM Techniques in Intensity Modulation/Direct Detection (IM/DD) Systems." Journal of Cybersecurity and Information Management 10, no. 2 (2022): 19–25. http://dx.doi.org/10.54216/jcim.100202.

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Optical wireless communications (OWC) are among the best alternative techniques for transmitting information-laden optical radiation across a free-space channel from one place to another. DC-biased optical OFDM (DCO-OFDM) is a technique that sacrifices the power efficiency to transmit unipolar OFDM signals. The primary drawback with DCO-OFDM is its clipping noise, which causes distortion and lowers the bit error rate (BER). Thus, in this paper, we show the performance of DCO with different coded techniques to improve the BER in additive white Gaussian noise (AWGN) for IMDD systems. The experim

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Soto, Marcelo A., Gabriele Bolognini, Fabrizio Di Pasquale, and Luc Thévenaz. "Long-range Brillouin optical time-domain analysis sensor employing pulse coding techniques." Measurement Science and Technology 21, no. 9 (2010): 094024. http://dx.doi.org/10.1088/0957-0233/21/9/094024.

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7

A. Memon, Kehkashan, A. W. Umrani, M. A. Unar, Wajiha Shah, and B. S. Chowdhry. "Spectral Amplitude Coding Optical CDMA: Performance Analysis on Free Space Optical Channel." International Journal of Engineering & Technology 7, no. 4.38 (2018): 31. http://dx.doi.org/10.14419/ijet.v7i4.38.24314.

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In this paper, we investigate the performance of Spectral Amplitude Coding Optical Code Division Multiple Access technique based on Free Space Optical channel. SAC OCDMA is one of the most popular multiplexing techniques since many years and FSO is gaining popularity and is very useful especially in point to point communication. The system presented in this paper utilizes Walsh Hadamard code as signature code. The coder and decoder structures are based on optical filters of fiber Bragg gratings (FBGs). This system focuses on the performance analysis of FSO based systems for subtropical regions

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8

Gao, Xiao Rong, Pei Wang, Jian Qiang Guo, Jin Long Li, Kai Yang, and Ti Kui Wang. "Error Correction Based on LDPC Codes in Wireless Optical Communication." Applied Mechanics and Materials 380-384 (August 2013): 3811–14. http://dx.doi.org/10.4028/www.scientific.net/amm.380-384.3811.

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Complex atmospheric environment seriously affect the quality of wireless of information transmission. In order to improve the wireless optical communication quality, and reduce the influence of attenuation, flicker, angle misalignment caused by atmospheric scattering, absorption, turbulence, beam expander, mismatch, atmospheric channel model is established while coding techniques for error control in wireless optical communication was researched into.The improvement result of error rate by error correction coding in different SNR situations was obtained. The results showed that the LDPC coding

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Ntogari, Georgia, Thomas Kamalakis, and Thomas Sphicopoulos. "Performance Analysis of Space Time Block Coding Techniques for Indoor Optical Wireless Systems." IEEE Journal on Selected Areas in Communications 27, no. 9 (2009): 1545–52. http://dx.doi.org/10.1109/jsac.2009.091204.

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Settles, G. S. "Colour-coding schlieren techniques for the optical study of heat and fluid flow." International Journal of Heat and Fluid Flow 6, no. 1 (1985): 3–15. http://dx.doi.org/10.1016/0142-727x(85)90024-4.

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11

Wijanto, Eddy, and Chun-Ming Huang. "Design of Bipolar Optical Code-Division Multiple-Access Techniques Using Phase Modulator for Polarization Coding in Wireless Optical Communication." Applied Sciences 11, no. 13 (2021): 5955. http://dx.doi.org/10.3390/app11135955.

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In this study, a bipolar optical code-division multiple-access (Bi-OCDMA) technique based on spectral amplitude coding (SAC) was proposed by using a phase modulator to realize polarization coding through a free-space optical (FSO) channel. Various types of noise, such as amplified spontaneous emission (ASE) noise, thermal noise, and shot noise, were included in the simulation to approach the real application. The first simulation, utilizing a modified M-sequence as signature code, demonstrated that the proposed Bi-OCDMA system could be implemented in FSO communication. The proposed Bi-OCDMA sc

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12

Fathallah, Habib, and Maged Esmail. "Performance evaluation of special optical coding techniques appropriate for physical layer monitoring of access and metro optical networks." Photonic Network Communications 30, no. 2 (2015): 223–33. http://dx.doi.org/10.1007/s11107-015-0513-3.

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13

Ladrido, John Martin, Emmanuel Trinidad, James Agustin Molina, and Lawrence Materum. "A Comparative Survey of Coding, Multiplexing, and Equalization Techniques Used in Coherent Optical Fiber Communications." International Journal on Advanced Science, Engineering and Information Technology 11, no. 3 (2021): 1049. http://dx.doi.org/10.18517/ijaseit.11.3.14093.

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14

Djordjevic, I. B., and B. Vasic. "Constrained coding techniques for the suppression of intrachannel nonlinear effects in high-speed optical transmission." Journal of Lightwave Technology 24, no. 1 (2006): 411–19. http://dx.doi.org/10.1109/jlt.2005.860139.

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15

Tseng, Shin-Pin, Eddy Wijanto, Po-Han Lai, and Hsu-Chih Cheng. "Bipolar Optical Code Division Multiple Access Techniques Using a Dual Electro-Optical Modulator Implemented in Free-Space Optics Communications." Sensors 20, no. 12 (2020): 3583. http://dx.doi.org/10.3390/s20123583.

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This study developed a bipolar optical code division multiple access (Bi-OCDMA) technique based on spectral amplitude coding for the formation and transmission of optical-polarized and coded signals over wireless optical channels. Compared with conventional Bi-OCDMA schemes, the proposed free-space optics communication system that uses a dual electro-optical modulator design improves the transmission rate. In theory, multiple access interference can be removed by using correlation subtraction schemes. The experiment results revealed that the proposed system can be employed to accurately extrac

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16

M. Alatwi, Aadel, and Ahmed Nabih Zaki Rashed. "Hybrid CPFSK/OQPSK modulation transmission techniques’ performance efficiency with RZ line coding–based fiber systems in passive optical networks." Indonesian Journal of Electrical Engineering and Computer Science 21, no. 1 (2021): 263. http://dx.doi.org/10.11591/ijeecs.v21.i1.pp263-270.

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<p><span>This study shows hybrid continuous-phase frequency shift keying (CPFSK)/optical quadrature-phase shift keying (OQPSK) modulation transmission techniques’ performance efficiency with return-to-zero (RZ) line coding scheme–based fiber systems in passive optical networks. Max. Q factor/min. bit error rate variations versus modulation frequency and fiber length are studied in detail for various bits/symbol, based on hybrid proposed modulation transmission techniques. Also, optical power and received electrical power variations are simulated with fiber-length variations at a sp

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17

Aldhaibani, A. O., S. A. Aljunid, Hilal A. Fadhil, and M. S. Anuar. "Improving OCDMA System via Combination of OFDM/OCDMA Techniques." Applied Mechanics and Materials 699 (November 2014): 937–41. http://dx.doi.org/10.4028/www.scientific.net/amm.699.937.

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This paper proposes a single sideband orthogonal frequency division multiplexing (SSB-OFDM) incorporated with spectral amplitude coding (SAC) optical code division multiple accesses (SAC-OCDMA). This scheme is a new technique designed to enhance overall OCDMA system performance. The system indicates good result in terms of higher transmission data rates and long distance according to conventional OCDMA system. Moreover, the results show that the presented system gives good performance based on constellation diagram distance and BER. The transceiver bit error rate (BER) for SSB improved by 10-1

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18

Ferran, Carme, Salvador Bosch, and Artur Carnicer. "Design of Optical Systems With Extended Depth of Field: An Educational Approach to Wavefront Coding Techniques." IEEE Transactions on Education 55, no. 2 (2012): 271–78. http://dx.doi.org/10.1109/te.2011.2169414.

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19

Abdallah, Mohammad A. "BER improvement in 5G MU MIMO-OFDM systems using channel coding techniques." Optica Pura y Aplicada 56, no. 1 (2023): 51121. http://dx.doi.org/10.7149/opa.56.1.51121.

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20

Yaseen, Zeyad. "Performance Analysis of DPSK Technique for Optical Transmission Systems." Innovation in Technology and Sciences 2021, no. 2 (2021): 6–10. http://dx.doi.org/10.52688/iss2/asp17354.

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The long-distance high data rate transmission is accompanied by many transmission defects, which reduce the performance of optical communication systems. Therefore, due to the need to increase data capacity for the end user, signal regeneration techniques were used to mitigate these non-linear defects in the electric or optical field. Several techniques used to modify the optical signal, which is the possible solution to reduce the limit of non-linear transmission defects, especially before converting the signal from the optical field to the electric field. Since most of the techniques used to

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21

Nakamichi, Yu, Valery A. Kalatsky, Hideyuki Watanabe, Takayuki Sato, Uma Maheswari Rajagopalan, and Manabu Tanifuji. "3D topology of orientation columns in visual cortex revealed by functional optical coherence tomography." Journal of Neurophysiology 119, no. 4 (2018): 1562–75. http://dx.doi.org/10.1152/jn.00921.2017.

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Orientation tuning is a canonical neuronal response property of six-layer visual cortex that is encoded in pinwheel structures with center orientation singularities. Optical imaging of intrinsic signals enables us to map these surface two-dimensional (2D) structures, whereas lack of appropriate techniques has not allowed us to visualize depth structures of orientation coding. In the present study, we performed functional optical coherence tomography (fOCT), a technique capable of acquiring a 3D map of the intrinsic signals, to study the topology of orientation coding inside the cat visual cort

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22

Ding, Jupeng, Chih-Lin I, Jintao Wang, Hui Yang, and Lili Wang. "Performance Comparison of Repetition Coding MIMO Optical Wireless Communications with Distinct Light Beams." Sensors 22, no. 3 (2022): 1256. http://dx.doi.org/10.3390/s22031256.

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In current optical wireless communications (OWC) oriented research works, the various multiple input multiple output (MIMO) techniques are introduced and utilized to enhance the coverage performance. Objectively, this Lambertian light beam based MIMO research paradigm neglects the light beam diversity and the potential performance gains. In this work, the distinct non-Lambertian light beams of commercially available light emitting diodes (LEDs) were adopted to configure MIMO OWC links. Specifically, the homogenous and heterogeneous non-Lambertian MIMO configurations were constituted in typical

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23

Yang, Zhi Guo, Dong Fei Liu, and Yu Gao. "Design and Implementation of Topology Management Based on EPON Network Management System." Advanced Materials Research 989-994 (July 2014): 4723–26. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.4723.

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The network bandwidth has been expanded after EPON(Ethernet Passive Optical Network ) came.So a topology management for EPON System is needed.In this paper, methods of topological data collection is analyzed, the form of topological data structure object is designed , and topological structure is displayed in the terminal by coding. With introducing in improved memory object and caching techniques, system performance was significantly improved through experiments.

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24

Mulualem, Yelkal. "Methodology of Implementing the Pulse code techniques for Distributed Optical Fiber Sensors by using FPGA: Cyclic Simplex Coding." International Journal of Computer Applications Technology and Research 5, no. 3 (2016): 151–55. http://dx.doi.org/10.7753/ijcatr0503.1007.

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25

Alatwi, Aadel M., and Ahmed Nabih Zaki Rashed. "Raised cosine/NRZ line coding techniques for upgrading free space optical communication systems through various levels of fog." TELKOMNIKA (Telecommunication Computing Electronics and Control) 18, no. 6 (2020): 2861. http://dx.doi.org/10.12928/telkomnika.v18i6.16236.

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26

Taiwo, Ambali, Majid Moghaddasi, Danjuma Kuje, Yahaya Idriss, and Makhfudza Mokhtar. "Practical investigation of suitable decoding techniques for spectral amplitude coding optical code division multiple access-based vibration sensing." IET Optoelectronics 10, no. 6 (2016): 227–32. http://dx.doi.org/10.1049/iet-opt.2015.0125.

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27

Lindovsky, Jiri, Marcela Palkova, Viktoriia Symkina, Miles Joseph Raishbrook, Jan Prochazka, and Radislav Sedlacek. "OCT and ERG Techniques in High-Throughput Phenotyping of Mouse Vision." Genes 14, no. 2 (2023): 294. http://dx.doi.org/10.3390/genes14020294.

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The purpose of the study is to demonstrate coherent optical tomography and electroretinography techniques adopted from the human clinical practice to assess the morphology and function of the mouse retina in a high-throughput phenotyping environment. We present the normal range of wild-type C57Bl/6NCrl retinal parameters in six age groups between 10 and 100 weeks as well as examples of mild and severe pathologies resulting from knocking out a single protein-coding gene. We also show example data obtained by more detailed analysis or additional methods useful in eye research, for example, the a

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28

Huang, H. K., Shih-Chung B. Lo, Bruce K. Ho, and Shyh-Liang Lou. "Radiological image compression using error-free irreversible two-dimensional direct-cosine-transform coding techniques." Journal of the Optical Society of America A 4, no. 5 (1987): 984. http://dx.doi.org/10.1364/josaa.4.000984.

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29

Hsu, Ching-Ting, Mei-Juan Chen, Wen-Wei Liao, and Shen-Yi Lo. "High Performance Spatial and Temporal Error-Concealment Algorithms for Block-Based Video Coding Techniques." ETRI Journal 27, no. 1 (2005): 53–63. http://dx.doi.org/10.4218/etrij.05.0104.0041.

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30

Cogswell, Carol J., Matthew R. Arnison, Edward R. Dowski, Sara C. Tuckert, and W. Thomas Catheyt. "A New Generation, Fast 3D Fluorescence Microscope using Wavefront Coding Optics." Microscopy and Microanalysis 5, S2 (1999): 466–67. http://dx.doi.org/10.1017/s1431927600015658.

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We are developing a “new-generation” fluorescence microscope that will allow very fast (milliseconds) acquisition of fully three-dimensional (3D) images for a wide spectrum of biological applications. This new system will overcome the slow image acquisition constraint of existing confocal and widefield deconvolution microscopes (the two most commonly used instruments for 3D fluorescence imaging) that has prevented them from being used for investigations of live-cell dynamics in three dimensions. Our new microscope incorporates the innovative techniques of optical wavefront coding, pioneered by

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Herrojo, Paredes, Mata-Contreras, and Martín. "Chipless-RFID: A Review and Recent Developments." Sensors 19, no. 15 (2019): 3385. http://dx.doi.org/10.3390/s19153385.

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In this paper, a review of the state-of-the-art chipless radiofrequency identification (RFID) technology is carried out. This recent technology may provide low cost tags as long as these tags are not equipped with application specific integrated circuits (ASICs). Nevertheless, chipless-RFID presents a series of technological challenges that have been addressed by different research groups in the last decade. One of these challenges is to increase the data storage capacity of tags, in order to be competitive with optical barcodes, or even with chip-based RFID tags. Thus, the main aim of this pa

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Moffat, Alistair, Timothy C. Bell, and Ian H. Witten. "Lossless Compression for Text and Images." International Journal of High Speed Electronics and Systems 08, no. 01 (1997): 179–231. http://dx.doi.org/10.1142/s0129156497000068.

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Most data that is inherently discrete needs to be compressed in such a way that it can be recovered exactly, without any loss. Examples include text of all kinds, experimental results, and statistical databases. Other forms of data may need to be stored exactly, such as images—particularly bilevel ones, or ones arising in medical and remote-sensing applications, or ones that may be required to be certified true for legal reasons. Moreover, during the process of lossy compression, many occasions for lossless compression of coefficients or other information arise. This paper surveys techniques f

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Weng, Yi, Junyi Wang, and Zhongqi Pan. "Recent Advances in DSP Techniques for Mode Division Multiplexing Optical Networks with MIMO Equalization: A Review." Applied Sciences 9, no. 6 (2019): 1178. http://dx.doi.org/10.3390/app9061178.

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This paper provides a technical review regarding the latest progress on multi-input multi-output (MIMO) digital signal processing (DSP) equalization techniques for high-capacity fiber-optic communication networks. Space division multiplexing (SDM) technology was initially developed to improve the demanding capacity of optic-interconnect links through mode-division multiplexing (MDM) using few-mode fibers (FMF), or core-multiplexing exploiting multicore fibers (MCF). Primarily, adaptive MIMO filtering techniques were proposed to de-multiplex the signals upon different modes or cores, and to dyn

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34

Hu, Chenyu, and Shensheng Han. "On Ghost Imaging Studies for Information Optical Imaging." Applied Sciences 12, no. 21 (2022): 10981. http://dx.doi.org/10.3390/app122110981.

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Since the birth of information theory, to understand, study, and optimize optical imaging systems from the information–theoretic viewpoint has been an important research subfield of optical imaging, accompanied by a series of corresponding advances. However, since the “direct point-to-point” image information acquisition mode of traditional optical imaging systems, which directly performs one-to-one signal mapping from the object to the detection plane, lacks a “coding–decoding” operation on the image information, related studies based on information theory are more meaningful in the theoretic

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35

Bharti, Manisha, Manoj Kumar, and Ajay K. Sharma. "A Novel Technique to Detect Code for SAC-OCDMA System." Journal of Optical Communications 39, no. 2 (2018): 215–21. http://dx.doi.org/10.1515/joc-2016-0132.

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AbstractThe main task of optical code division multiple access (OCDMA) system is the detection of code used by a user in presence of multiple access interference (MAI). In this paper, new method of detection known as XOR subtraction detection for spectral amplitude coding OCDMA (SAC-OCDMA) based on double weight codes has been proposed and presented. As MAI is the main source of performance deterioration in OCDMA system, therefore, SAC technique is used in this paper to eliminate the effect of MAI up to a large extent. A comparative analysis is then made between the proposed scheme and other c

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36

Ramavath, Prasad Naik, Shripathi Acharya Udupi, and Prabu Krishnan. "High-speed and reliable Underwater Wireless Optical Communication system using Multiple-Input Multiple-Output and channel coding techniques for IoUT applications." Optics Communications 461 (April 2020): 125229. http://dx.doi.org/10.1016/j.optcom.2019.125229.

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37

Shi, Jianyang, Wenqing Niu, Yinaer Ha, et al. "AI-Enabled Intelligent Visible Light Communications: Challenges, Progress, and Future." Photonics 9, no. 8 (2022): 529. http://dx.doi.org/10.3390/photonics9080529.

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Visible light communication (VLC) is a highly promising complement to conventional wireless communication for local-area networking in future 6G. However, the extra electro-optical and photoelectric conversions in VLC systems usually introduce exceeding complexity to communication channels, in particular severe nonlinearities. Artificial intelligence (AI) techniques are investigated to overcome the unique challenges in VLC, whereas considerable obstacles are found in practical VLC systems applied with intelligent learning approaches. In this paper, we present a comprehensive study of the intel

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38

Barr, Mohammad. "A Fast Encoding Scheme for High Efficiency Video Coding." Recent Advances in Electrical & Electronic Engineering (Formerly Recent Patents on Electrical & Electronic Engineering) 13, no. 6 (2020): 933–41. http://dx.doi.org/10.2174/2352096513666191227102559.

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Background: High-Efficiency Video Coding (HEVC) is a recent video compression standard. It provides better compression performance compared to its predecessor, H.264/AVC. However, the computational complexity of the HEVC encoder is much higher than that of H.264/AVC encoder. This makes HEVC less attractive to be used in real-time applications and in devices with limited resources (e.g., low memory, low processing power, etc.). The increased computational complexity of HEVC is partly due to its use of a variable size Transform Unit (TU) selection algorithm which successively performs transform

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A, Bharathi, Siva C, Suguna Angamuthu, and Thangamani M. "Multi Objective Concerned Network Coding Technique for Optimal Data Transmission." Webology 18, no. 05 (2021): 1191–203. http://dx.doi.org/10.14704/web/v18si05/web18300.

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The Internet of Things (IoT) seems to developed in the real-world scenario due to increased utilization of sensor driven technologies. There are various research works has been proposed earlier for the network coding to ensure the reliable data transmission. However, existing research techniques doesn’t focus on the reliable route path selection which might affect the rate of data transmission. These issues are focused in the proposed research method by introducing the method namely Multi-Objective concerned Network Coding Technique (MO-NCT). In this work initially multicast tree construction

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Chang, Yao Tang, and Chung Wei Tsailin. "Enhanced Design for AWG-Based Dynamic Reconfigurable Free-Spectral-Range Group Hopping Coder/Decoders to Protect against Eavesdropping." Applied Mechanics and Materials 764-765 (May 2015): 1240–44. http://dx.doi.org/10.4028/www.scientific.net/amm.764-765.1240.

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To further robust confidentiality protecting against eavesdropping over optical code-division multiple-access (OCDMA) networks, this study improves the robustness of the network toward eavesdropping for encryption/decryption mechanism by using a specified storage register controller controlling optical switches approach in which Free-spectral-range group hopping code is used to generate a specific signature address. This paper presents an enhanced security mechanism to protect spectral-amplitude-coding optical code-division multiple-access (SAC-OCDMA) networks against eavesdropping. This study

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Sarangal, Himali, Amarpal Singh, and Jyoteesh Malhotra. "Construction and Analysis of a Novel SAC-OCDMA System with EDW Coding using Direct Detection Technique." Journal of Optical Communications 40, no. 3 (2019): 265–71. http://dx.doi.org/10.1515/joc-2017-0061.

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Abstract Spectral amplitude coding optical code division multiple access (SAC-OCDMA) is a promising innovation for burst and asynchronous environment. This paper endeavors to analyze the efficacy of the proposed optimum SAC-OCDMA system by utilizing enhanced double-weight (EDW) code for six users operating at a bit rate of 60 Gb/s (10×6 Gb/s). Also, an algorithm is designed for EDW code with mapping technique for any weight that can be greater than two. The EDW code is analyzed for bit error rate (BER) and Q-factor using direct detection technique. Further, the system is compared with three di

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42

Das, Bhagwan, Nawaz Ali Zardari, Farah Deeba, and Dileep Kumar Ramnani. "Design and Development of GUI for the Mitigation of Chromatic Dispersion: A New Approach." Sukkur IBA Journal of Emerging Technologies 5, no. 1 (2022): 19–31. http://dx.doi.org/10.30537/sjet.v5i1.937.

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Chromatic Dispersion (CD) is the important effect that is considering for optical communication system design as it broadens the pulse during the propagation along channel resulting in pulse overlapping and ultimately bit errors raises. The increment in bit error, in result reduce the performance of optical system. Therefore, mitigation CD is necessary in order to improve the performance of optical communication system. There are several techniques of mitigating CD have been proposed and all based on coding based and this will create issues for the communication design engineer that every time

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43

Garcia-González, Wendy, Wendy Flores-Fuentes, Oleg Sergiyenko, Julio C. Rodríguez-Quiñonez, Jesús E. Miranda-Vega, and Daniel Hernández-Balbuena. "Shannon Entropy Used for Feature Extractions of Optical Patterns in the Context of Structural Health Monitoring." Entropy 25, no. 8 (2023): 1207. http://dx.doi.org/10.3390/e25081207.

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A novelty signal processing method is proposed for a technical vision system (TVS). During data acquisition of an optoelectrical signal, part of this is random electrical fluctuation of voltages. Information theory (IT) is a well-known field that deals with random processes. A method based on using of the Shannon Entropy for feature extractions of optical patterns is presented. IT is implemented in structural health monitoring (SHM) to augment the accuracy of optoelectronic signal classifiers for a metrology subsystem of the TVS. To enhance the TVS spatial coordinate measurement performance at

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44

Zadok, Avi, Eyal Preter, and Yosef London. "Phase-Coded and Noise-Based Brillouin Optical Correlation-Domain Analysis." Applied Sciences 8, no. 9 (2018): 1482. http://dx.doi.org/10.3390/app8091482.

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Correlation-domain analysis has enabled distributed measurements of Brillouin gain spectra along optical fibers with high spatial resolution, up to millimeter-scale. The method relies on the joint modulation of counter-propagating Brillouin pump and signal waves so that their complex envelopes are correlated in select positions only. Brillouin optical correlation-domain analysis was first proposed nearly 20 years ago based on frequency modulation of the two waves. This paper reviews two more recent variants of the concept. In the first, the Brillouin pump and signal waves are co-modulated by h

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HEIDERGOTT, W. F. "SYSTEM LEVEL SINGLE EVENT UPSET MITIGATION STRATEGIES." International Journal of High Speed Electronics and Systems 14, no. 02 (2004): 341–52. http://dx.doi.org/10.1142/s0129156404002399.

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Use of a systems engineering process and the application of techniques and methods of fault tolerant systems are applicable to the development of a mitigation strategy for Single Event Upsets (SEU). Specific methods of fault avoidance, fault masking, detection, containment, and recovery techniques are important elements in the mitigation of single event upsets. Fault avoidance through the use of SEU hardened technology, fault masking using coding and redundancy provisions, and solutions applied at the subsystem and system level are available to the system developer. Validation and verification

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Kosman, John, Kevin Moore, Harald Haas, and Robert K. Henderson. "Distortion losses of high-speed single-photon avalanche diode optical receivers approaching quantum sensitivity." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 378, no. 2169 (2020): 20190194. http://dx.doi.org/10.1098/rsta.2019.0194.

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The high internal gain of single-photon avalanche diodes (SPADs) operating in Geiger mode allows the quantum limit of detection to be approached. This offers a significantly improved sensitivity for optical communication over existing photodiodes. A fully integrated CMOS SPAD array receiver (RX) is presented which achieves 500 Mb s −1 four-level pulse amplitude modulation in a visible light communication link within 15.2 dB of the quantum limit. However, SPAD dead time induces around 5.7 dB of transient distortion which restricts error performance and data rate. We propose a model describing a

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Mrabet, Hichem. "A Performance Analysis of a Hybrid OCDMA-PON Configuration Based on IM/DD Fast-OFDM Technique for Access Network." Applied Sciences 10, no. 21 (2020): 7690. http://dx.doi.org/10.3390/app10217690.

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The purpose of this article is to propose a new configuration based on OCDMA and Fast-OFDM techniques for access network applications. A hybrid intensity modulation with direct detection, fast orthogonal frequency-division multiplexing–code division multiplexing access (IM/DD Fast-OFDM-CDMA) system is analytically and numerically evaluated for an amplifier-free access network. Therefore, system performance is analytically investigated in terms of bit error rate/Q-factor as a function of simultaneous users, fiber length and launched optical power. Firstly, the proposed analytical model includes

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Hayal, Mohammed R., Bedir B. Yousif, and Mohamed A. Azim. "Performance Enhancement of DWDM-FSO Optical Fiber Communication Systems Based on Hybrid Modulation Techniques under Atmospheric Turbulence Channel." Photonics 8, no. 11 (2021): 464. http://dx.doi.org/10.3390/photonics8110464.

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In this paper, we enhance the performance efficiency of the free-space optical (FSO) communication link using the hybrid on-off keying (OOK) modulation, M-ary digital pulse position modulation (M-ary DPPM), and M-pulse amplitude and position modulation (M-PAPM). This work analyzes and enhances the bit error rate (BER) performance of the moment generating function, modified Chernoff bound, and Gaussian approximation techniques. In the existence of both an amplified spontaneous emission (ASE) noise, atmospheric turbulence (AT) channels, and interchannel crosstalk (ICC), we propose a system model

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Jose, John Anthony C., Ciprian D. Billones Jr., Allysa Kate M. Brillantes, et al. "Artificial Intelligence Software Application for Contactless Traffic Violation Apprehension in the Philippines." Journal of Advanced Computational Intelligence and Intelligent Informatics 25, no. 4 (2021): 410–15. http://dx.doi.org/10.20965/jaciii.2021.p0410.

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This paper presents a prototype of a centralized contactless traffic violation apprehension system composed of an artificial intelligence (AI) engine and a web application. The AI engine collects traffic data, primarily traffic violation data, through a contactless approach by using different video and image processing techniques and AI algorithms in its three modules: license plate detection, optical character recognition (OCR), and number coding violation detection. The web application consolidates all the data produced by the AI engine and provides a graphical user interface (GUI) for data

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Naim, Nani Fadzlina, Muhammad Firdaus Hazian, Suzi Seroja Sarnin, Norsuzila Ya’acob, and Latifah Sarah Supian. "Design and Performance Analysis of DWDM-PON." Journal of Physics: Conference Series 2411, no. 1 (2022): 012007. http://dx.doi.org/10.1088/1742-6596/2411/1/012007.

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Abstract This paper presents on the design and analysis of Dense Wavelength Division Multiplexing Passive Optical Network (DWDM-PON) which is the upcoming trend technology nowadays to transmit up to 40 Gbps data. Various modulation techniques such as Non-Return Zero (NRZ), Return-Zero (RZ) and duo binary coding are simulated in this DWDM-PON. Using OptiSystem software, DWDM-PON is designed and simulated for 32 channels with spacing of 100 GHz and bit rate of 10 Gbps. An Erbium Doped Fiber Amplifier (EDFA) and Dispersion - Compensating Fiber (DCF) is deployed in the DWDM design. It is found tha

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