Готові списки джерел за темами / Optical orthogonal codes (OOC)

Добірка наукової літератури з теми "Optical orthogonal codes (OOC)"

Автор: Grafiati

Опубліковано: 23 лютого 2024

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Статті в журналах з теми "Optical orthogonal codes (OOC)"

Kumar, Ankit, Manisha Bharti, and Tanya Kumar. "Performance Investigation of 2-D Optical Orthogonal Codes for OCDMA." Journal of Optical Communications 40, no. 4 (October 25, 2019): 455–62. http://dx.doi.org/10.1515/joc-2017-0112.

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Abstract In this paper, comparative analysis of code performance of dissimilar optical 2-D codes from Optical Orthogonal code family has been studied. Optical 2-D codes considered from OOC family are (n,w,1,2) OOC, SPS/OOC, OCFHC/OOC, EPC/OCS and VWOOC. By utilizing hard limiting error probability (HEP) equations and combinatorial method, code performance of each considered code is evaluated in detail. On the basis of detailed comparative performance analysis, EPC/OCS is concluded as best performing codes among all other optical codes under consideration. EPC/OCS possesses much better correlation properties, along with lower hit probability values which are responsible for its supremacy in performance characteristics to the other OOCs considered.

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Li, X. B., H. B. Huang, and L. C. Wang. "Discussion on Construction of OCDMA PON Address Code-(F,K,2) Optical Orthogonal Codes." Advanced Materials Research 216 (March 2011): 804–8. http://dx.doi.org/10.4028/www.scientific.net/amr.216.804.

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Optical code division multiple access (OCDMA) passive optical network (PON) can find wide applications in the next optical access network. One of its key techniques of is construction of address code. Aiming at the facts that(F,K,1) optical orthogonal code (OOC) possesses good performance but capacity is small, and number of users in OCDMA PON is not very big thereafter OOC auto-correlation or cross-correlation may not be very strict,(F,K,2) OOC can be used as address codes for OCDMA PON. In this paper, the method of constructingOOC based on block design is discussed. The algorithm of construction (F,K,2) of OOC from block design is presented and simulated; several groups of(F,K,2) OOC are gained. The results show that the algorithm has good astringency and simplicity. It can construct(F,K,2) OOC effectively. It is feasible.

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Asif, Muhammad, Wuyang Zhou, Qingping Yu, Xingwang Li, and Nauman Ali Khan. "A Deterministic Construction for Jointly Designed Quasicyclic LDPC Coded-Relay Cooperation." Wireless Communications and Mobile Computing 2019 (September 26, 2019): 1–12. http://dx.doi.org/10.1155/2019/5249373.

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This correspondence presents a jointly designed quasicyclic (QC) low-density parity-check (LDPC) coded-relay cooperation with joint-iterative decoding in the destination node. Firstly, a design-theoretic construction of QC-LDPC codes based on a combinatoric design approach known as optical orthogonal codes (OOC) is presented. Proposed OOC-based construction gives three classes of binary QC-LDPC codes with no length-4 cycles by utilizing some known ingredients including binary matrix dispersion of elements of finite field, incidence matrices, and circulant decomposition. Secondly, the proposed OOC-based construction gives an effective method to jointly design length-4 cycles free QC-LDPC codes for coded-relay cooperation, where sum-product algorithm- (SPA-) based joint-iterative decoding is used to decode the corrupted sequences coming from the source or relay nodes in different time frames over constituent Rayleigh fading channels. Based on the theoretical analysis and simulation results, proposed QC-LDPC coded-relay cooperations outperform their competitors under same conditions over the Rayleigh fading channel with additive white Gaussian noise.

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Baicheva, Tsonka, and Svetlana Topalova. "Maximal (v, k, 2, 1) Optical Orthogonal Codes with k = 6 and 7 and Small Lengths." Mathematics 11, no. 11 (May 26, 2023): 2457. http://dx.doi.org/10.3390/math11112457.

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Optical orthogonal codes (OOCs) are used in optical code division multiple access systems to allow a large number of users to communicate simultaneously with a low error probability. The number of simultaneous users is at most as big as the number of codewords of such a code. We consider (v,k,2,1)-OOCs, namely OOCs with length v, weight k, auto-correlation 2, and cross-correlation 1. An upper bound B0(v,k,2,1) on the maximal number of codewords of such an OOC was derived in 1995. The number of codes that meet this bound, however, is very small. For k≤5, the (v,k,2,1)-OOCs have already been thoroughly studied by many authors, and new upper bounds were derived for (v,4,2,1) in 2011, and for (v,5,2,1) in 2012. In the present paper, we determine constructively the maximal size of (v,6,2,1)- and (v,7,2,1)-OOCs for v≤165 and v≤153, respectively. Using the types of the possible codewords, we calculate an upper bound B1(v,k,2,1)≤B0(v,k,2,1) on the code size of (v,6,2,1)- and (v,7,2,1)-OOCs for each length v≤720 and v≤340, respectively.

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Bouregaa, Mouweffeq, Mohammed El Kebir Chikh-Bled, Mohammed Debbal, Mohammed Chamse Eddine Ouadah, and Hicham Chikh-Bled. "Optical Code Division Multiple Access for FTTH system." Photonics Letters of Poland 10, no. 4 (December 31, 2018): 121. http://dx.doi.org/10.4302/plp.v10i4.861.

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Many multiple access techniques have been proposed and demonstrated to provide flexible solutions for FTTH network configurations. The performance of this system suffers because of the correlation properties that contribute to a high level of Multiple Access Interference (MAI), low system capacity (users), and lower transmission rate. In this paper, we have proposed Optical CDMA (OCDMA) as a configuration solution for FTTH networks to improve the performance of this type of network. Full Text: PDF References. Z. Mateusz, M. Mariusz, On cost of the uniformity in FTTH network design, Conference on Transparent Optical Networks (2017), 87-90 CrossRef CEDRIC F. LAM, Passive Optical Networks- Principles and Practice, first ed., British Library, USA, 2007. DirectLink M.K. Abdullah, W.T. P'ng, P.W. Lau, E.R. Tee, FTTH access network protection using a switch, Asia Pacific Conference on Communications (APCC), 3(2003) 1219–1222. CrossRef J. Ronnakorn, S. Napat, L. Somkiat, Design and implement of GPON-FTTH network for residential condominium, Conference on Computer Science and Software Engineering, (2017), 333-339. CrossRef M. BOUREGAA, M. CHIKH-BLED, Comparative Study of Optical Unipolar Codes for Incoherent DS-OCDMA system, International Journal of Hybrid Information Technology, 6 (2013) 225-236. CrossRef M. BOUREGAA, M. CHIKH-BLED, The performance of a DS-OCDMA system using Orthogonal Optical Codes (OOC), European Scientific Journal, 9 (2013), 322-335 CrossRef M. Iwase, Y. Ishikawa, T. Komatsu, J. Kasahara, N. Hattori, M. Miura, N. Nakamura, K. Odaka, Optical transceiver modules for gigabit Ethernet PON FTTH systems, Furukawa Review, 28 (2005) 8-10. DirectLink

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Chee, Yeow Meng, Han Mao Kiah, San Ling, and Hengjia Wei. "Geometric Orthogonal Codes of Size Larger Than Optical Orthogonal Codes." IEEE Transactions on Information Theory 64, no. 4 (April 2018): 2883–95. http://dx.doi.org/10.1109/tit.2017.2788140.

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Murad, Mohsin, Imran A. Tasadduq, and Pablo Otero. "Coded-GFDM for Reliable Communication in Underwater Acoustic Channels." Sensors 22, no. 7 (March 30, 2022): 2639. http://dx.doi.org/10.3390/s22072639.

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The performance of the coded generalized frequency division multiplexing (GFDM) transceiver has been evaluated in a shallow underwater acoustic channel (UAC). Acoustic transmission is the scheme of choice for communication in UAC since radio waves suffer from absorption and light waves scatter. Although orthogonal frequency division multiplexing (OFDM) has found its ground for multicarrier acoustic underwater communication, it suffers from high peak to average power ratio (PAPR) and out of band (OOB) emissions. We propose a coded-GFDM based multicarrier system since GFDM has a higher spectral efficiency compared to a traditional OFDM system. In doing so, we assess two block codes, namely Bose, Chaudari, and Hocquenghem (BCH) codes, Reed-Solomon (RS) codes, and several convolutional codes. We present the error performances of these codes when used with GFDM. Furthermore, we evaluate the performance of the proposed system using two equalizers: Matched Filter (MF) and Zero-Forcing (ZF). Simulation results show that among the various block coding schemes that we tested, BCH (31,6) and RS (15,3) give the best error performance. Among the convolutional codes that we tested, rate 1/4 convolutional codes give the best performance. However, the performance of BCH and RS codes is much better than the convolutional codes. Moreover, the performance of the ZF equalizer is marginally better than the MF equalizer. In conclusion, using the channel coding schemes with GFDM improves error performance manifolds thereby increasing the reliability of the GFDM system despite slightly higher complexity.

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Sheng Peng Wan and Yu Hu. "Two-dimensional optical CDMA differential system with prime/OOC codes." IEEE Photonics Technology Letters 13, no. 12 (December 2001): 1373–75. http://dx.doi.org/10.1109/68.969912.

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Argon, Cenk. "Semi-randomly constructed optical orthogonal codes." Optics Communications 282, no. 4 (February 2009): 500–503. http://dx.doi.org/10.1016/j.optcom.2008.10.043.

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Chang, Yanxun, and Ying Miao. "Constructions for optimal optical orthogonal codes." Discrete Mathematics 261, no. 1-3 (January 2003): 127–39. http://dx.doi.org/10.1016/s0012-365x(02)00464-8.

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Дисертації з теми "Optical orthogonal codes (OOC)"

Isaksson, Erica. "Cardinality for optical orthogonal codes with variable length and weight." Thesis, Linköping University, Department of Electrical Engineering, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-7672.

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To let many users beneﬁt from the high speed communication in an optical ﬁber, a way to share the channel is needed. One way to share the channel between the users is the multiple access technique of Code Division Multiple Access, CDMA. This technique is based on coding. By assigning the users diﬀerent codewords, the receiver is able to distinguish the information sent from each user. One family of codes suitable to use in a ﬁber optic network is the constant weight Optical Orthogonal Codes, OOC.

To inﬂuence the users interference tolerability it is possible to assign the users codewords of the same length but with diﬀerent weights. By letting the users have codewords of diﬀerent length it is possible to have diﬀerent data rates in the system. These two versions of optical orthogonal codes, with variable length and weight, are investigated in this thesis for their cardinality. The variable weight and variable length codes were created by combining optical orthogonal codes with diﬀerent parameters.

I have found that for variable length OOC:s of weight 2 it seems to be possible to increase the cardinality of a code, but for codes with higer weights than that, it is better that all users are assigned codewords of the same length. But since an upper bound for the cardinality of these types of codes has not been found, it is not possible to verify if this conclusion is correct. For variable weight OOC:s it is found that it is only possible to increase the cardinality of small, not optimal, codes. For codes including many codewords it is rarely possible to include more codewords without breaking the conditions on cross correlation between the codewords.

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Karlsson, Andreas. "Simulation of a CDMA system based on optical orthogonal codes." Thesis, Linköping University, Department of Electrical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2300.

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To take advantage of the high speed in an optic fiber, one of the basic concept in fiber optic communication is to allow several users to simultaneously transmit data over the channel. One technique that provides multiple access is it fiber optic-code division multiple access (FO-CDMA). In FO-CDMA each user is assigned one or more signature sequences called codewords, which are subsets of a type of optical orthogonal code (OOC). The channel input/output consists of the superposition of several users codewords and at the receiver end an optical correlator extracts the information.

In the parallel code constructions, presented in this report, each user j is assigned a subset Cj from a code C. The subsets are disjoint and their union is the whole set C. A new way to map the information bits is to insert up to L zeros before each codeword from Cj and let this represent information aswell. This gives high rates for active users but an investigation is needed to ensure that this does not compromise the systems wanted property of sending information with a small probability of errors for all users. Therefore a simulation environment has been implemented in Matlab.

The result from these simulations shows that BER for the L parallel codes is acceptable and not much higher than for the traditional constructions. Because of the higher rate these construction should be preferred but an analysis if a hardware implementation is possible.

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Boussebt, Amina. "Etude et mise en oeuvre de la technologie Li-Fi pour un lit de bébé connecté sans fil et sans radio." Electronic Thesis or Diss., Limoges, 2023. http://www.theses.fr/2023LIMO0091.

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Le domaine de la télésurveillance a connu un grand essor ces dernières décennies et concerne divers contextes par exemple en milieu hospitalier, en maison de retraite, chez les particuliers. La majorité des systèmes de télésurveillance existants aujourd’hui reposent sur la technologie des radiofréquences (RF). Nous proposons dans cette thèse, des travaux portant sur la télésurveillance dans un contexte nouveau qui concerne une crèche. Les RF présentant certains inconvénients, comme l’impact des interférences électromagnétiques, mais aussi des failles de sécurité, une solution alternative est la technologie de communication par optique sans fil. Ainsi, nous avons étudié l'utilisation de la technologie infrarouge pour la transmission simultanée de données issues de capteurs placés sur les pieds des lits de bébé mais aussi sur les bébés couchés dans leur lit au sein de la crèche. Le système de réception est constitué de photodiodes situées aux coins d'un panneau d'éclairage central au plafond de l'environnement. La simulation du canal réalisée grâce à la technique de lancer de rayons associés à la méthode de Monte-Carlo a permis de déterminer le gain du canal pour chaque dispositif. Plusieurs scénarios de déploiement ont été définis en considérant le caractère amovible ou fixe des dispositifs et l’interchangeabilité des lits dans la pièce. Le partage du canal utilise la technique d’accès multiple par répartition de codes (OCDMA) associée aux codes optiques orthogonaux (OOC) dont la principale limitation est l’interférence d’accès multiple (IAM). Les performances de la modulation binaire par position d’impulsion (2-PPM) avec OCDMA et un décodage souple en réception ont été établies théoriquement et par simulation pour les différents scénarios définis considérant un réseau de 11 utilisateurs constitué de 8 lits et 3 dispositifs portés par des bébés. Les résultats ont été obtenus avec des récepteurs conventionnels par corrélation sans et avec limiteur puis un récepteur à annulation parallèle d’interférence plus efficace pour réduire l’impact de l’IAM. De plus, la faisabilité de l’utilisation de la technique OCDMA pour la transmission simultanée en optique sans fil a été mise en évidence par des expérimentations menées grâce à un banc de test développé en radio logicielle. Le banc a été mis en place, en utilisant des USRP (Universal Software Radio Peripheral) et des front-ends optique sans fil développés spécifiquement
The field of the remote monitoring has experienced significant advancements in recent decades, and now covers different contexts, such as hospitals, retirement homes, and private homes also. The majority of existing systems are based on radio frequency technology (RF).We propose in this thesis, research focused on remote monitoring in a new context involving a nursery. Given the limitations of RF technology, including the impact of electromagnetic interference, and security vulnerabilities, an alternative solution is optical wireless communication technology. Therefore, we investigated the use of infrared technology for simultaneous transmission of data collected from sensors placed on the foot of baby beds, and also on the babies themselves lying in their beds within the nursery. The reception system consists of photodiodes positioned at the corners of a central lighting panel on the celling. The channel simulation carried out using ray-tracing and Monte-Carlo methods was used to determine the channel gain for each device. Several deployment scenarios were defined, considering the nature of the devices (removable or fixed) and the interchangeability of beds in the room. The channel sharing employs the code division multiple access (OCDMA) associated with the optical orthogonal codes (OOC) with the primary constraint being the137 multiple access interference (MAI). The performance of binary pulse position modulation (2- PPM) with OCDMA and soft decoding in reception was studied theoretically and by simulation involving the different scenarios. These scenarios consider a network of 11 users, consisting of 8 beds and 3 devices carried by babies. Results were obtained using the conventional correlation receiver without and with hard limiters, as well as a parallel interference cancellation receiver to reduce the impact of MAI. Additionally, the feasibility of implementing OCDMA technology for simultaneous optical wireless communication transmission was demonstrated through experimental work using a test bench developed in software-defined radio. The test bench was established using universal software radio peripheral (USRP), and specially designed wireless optical front-ends

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Mustapha, Mazlyn Mona. "Non-coherent optical fibre-based CDMS using optical orthogonal codes." Thesis, Cranfield University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.435041.

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Sawa, Masanori. "Optical Orthogonal Signature Pattern Codes with Maximum Collision Parameter 2 and Weight 4." IEEE, 2010. http://hdl.handle.net/2237/14501.

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Abaza, Mohamed. "Cooperative MIMO techniques for outdoor optical wireless communication systems." Thesis, Brest, 2015. http://www.theses.fr/2015BRES0073/document.

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Au cours de la dernière décennie, les communications optiques en espace libre (FSO) ont pris de l’ampleur dans les deux domaines académiques et industriels. L’importance de FSO s’appuie sur la possibilité de faire un système de transmission économique et écologique avec un débit élevé et sans licence à l’opposition des systèmes de transmission radiofréquences (RF). Dans la plupart des travaux antécédents sur les systèmes multi-émetteurs, seulement les canaux décorrélés ont été considérés. Un canal décorrélé nécessite un espace suffisant entre les émetteurs. Cette condition devient difficile et non-réalisable dans certaines applications. Pour cette raison, nos études se focalisent sur les performances des codes à répétition RC (Repitition Codes) et les codes OSTBC (Orthogonal Space-Time Block Codes) dans des canaux log-normaux corrélés en utilisant une modulation d’intensité et une détection directe (IM/DD). En addition, les effets des différentes conditions météorologiques sur le taux d’erreur moyen (ABER) sont étudiés. Les systèmes FSO à multi-entrées/ multi-sorties MIMO (Multiple-Input Multiple-Output) avec une modulation SSK (Space Shift Keying) ont été abordés. Les résultats obtenus montrent que la SSK est supérieure aux RC avec une modulation d’impulsion (Multiple Pulse Amplitude Modulation) pour toute efficacité spectrale égale ou supérieure à 4 bit/s/Hz. Nous avons aussi analysé les performances d’un système à sauts multiples (Multi-Hop) et des relais à transmission directe (forward relays). Nos simulations montrent que le système ainsi considéré est efficace pour atténuer les effets météorologiques et les pertes géométriques dans les systèmes de communication FSO. Nous avons montré qu’un tel système avec plusieurs entrées et une sortie (MISO, i.e. multiple-input single-output) à sauts multiples est supérieur à un système MISO avec un lien direct (direct link) avec une forte atténuation. Pour satisfaire la demande croissante des réseaux de communication à débits élevés, la communauté scientifique s'intéresse de plus en plus aux systèmes FSO avec des relais full-duplex (FD). Pour ces derniers systèmes, nous avons étudié la probabilité d'erreur moyenne (ABER) et nous avons analysé leurs performances. En considérant des différentes conditions de transmission, les performances de relais FD ont été comparées à celles d'un système avec un lien direct ou des relais half-duplex. Les résultats obtenus montrent que les relais FD ont le minimum ABER. En conséquence, les résultats obtenus dans cette thèse sont très prometteurs pour la prochaine génération de FSO
Free-space optical (FSO) communication has been the subject of ongoing research activities and commercial attention in the past few years. Such attention is driven by the promise of high data rate, license-free operation, and cheap and ecological friendly means of communications alternative to congested radio frequency communications. In most previous work considering multiple transmitters, uncorrelated channel conditions have been considered. An uncorrelated channel requires sufficient spacing between transmitters. However, this can be difficult and may not be always feasible in some applications. Thereby, this thesis studies repetition codes (RCs) and orthogonal space-time block codes performance in correlated log-normal FSO channels using intensity modulation and direct detection (IM/DD). Furthermore, the effect of different weather conditions on the average bit error rate (ABER) performance of the FSO links is studied. Multiple-input multiple-output (MIMO) FSO communication systems using space shift keying (SSK) modulation have been also analyzed. Obtained results show that SSK is a potential technique for spectral efficiencies equal or greater than 4 bits/s/Hz as compared to RCs with multiple pulse amplitude modulations. The performance analysis of a multi-hop decode and forward relays for FSO communication system using IM/DD is also considered in this thesis. It is shown that multi-hop is an efficient technique to mitigate atmospheric turbulence and different weather attenuation effects and geometric losses in FSO communication systems. Our simulation results show that multiple-input single-output (MISO) multi-hop FSO systems are superior to direct link and MISO systems over links exhibiting high attenuation. Meeting the growing demand for higher data rates communication networks, a system with full-duplex (FD) relays is considered. For such a system, the outage probability and the ABER performance are analyzed under different turbulence conditions, misalignment error and path loss effects. FD relays are compared with the direct link and half-duplex relays. Obtained results show that FD relays have the lowest ABER and the outage probability as compared to the two other systems. Finally, the obtained results in this thesis are very promising towards the next generation of FSO systems

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Zou, Ding, and Ding Zou. "FPGA-Based LDPC Coded Modulations for Optical Transport Networks." Diss., The University of Arizona, 2017. http://hdl.handle.net/10150/622985.

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Current coherent optical transmission systems focus on single carrier solutions for 400Gb/s serial transmission to support traffic growth in fiber-optics communications, together with a few subcarriers multiplexed solutions for the 1 Tb/s serial data rates and beyond. With the advancement of analog-to-digital converter technologies, high order modulation formats up to 64-QAM with symbol rate up to 72Gbaud have been demonstrated experimentally with Raman amplification. To enable such high serial data rates, it is highly desirable to implement in hardware low complexity digital signal processing schemes and advanced forward error correction coding with powerful error correction capability. In this dissertation, to enable high-speed optical communications, we first proposed an efficient FPGA architecture of high-performance binary and non-binary LDPC engines that can support throughputs of multiple Gb/s, which have low power consumption, providing high net coding gains at a target bit-error rate of 10-15. Further, we implement a generalized LDPC coding based rate adaptive binary LDPC coding scheme and puncturing based rate adaptive non-binary LDPC coding scheme, where large number of parameters can be reconfigured in order to cope with the time-varying optical channel conditions and service requirements. Based on comprehensive analysis on complexity, latency, and power consumption we demonstrate that the proposed efficient implementation represents a feasible solution for the next generation optical communication networks. Additionally, we investigate the FPGA implementation of rate adaptive regular LDPC coding combined with up to six high-order modulation formats and demonstrate high net coding gain performance and demonstrated a bit loading algorithm for irregular LDPC coding. Lastly, we present the real-time implementation of a direct detection OFDM transceiver with multi Giga symbols/s symbol rates in a back-to-back configuration.

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Shivaleela, E. S. "Design Of Two Dimensional Codes For Fiber-Optic CDMA Networks." Thesis, 1996. https://etd.iisc.ac.in/handle/2005/1892.

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Shivaleela, E. S. "Design Of Two Dimensional Codes For Fiber-Optic CDMA Networks." Thesis, 1996. http://etd.iisc.ernet.in/handle/2005/1892.

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Chiang, Kun-Ling, and 江昆霖. "Spatial/Spectral Optical CDMA Systems Using Two-Dimensional OOC/M-Sequence Codes." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/jrd25g.

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碩士
國立中興大學
電機工程學系所
99
In this thesis, a family of new two-dimensional optical codes, so called OOC/M-sequence codes, is proposed for spectral-amplitude-coding optical code-division multiple access. A new 2-D spatial/spectral transceiver structure, which employs the multiple-access-interfering canceling property of the new codes, is also presented. Comparing with a former system using M-matrices codes, our analysis and numerical results show that the proposed system is better in suppressing phase-induced intensity noise and more flexible in choosing code length, and also supports more active user for a given error probability.

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Книги з теми "Optical orthogonal codes (OOC)"

Petroutsos, Alexander. Optical orthogonal codes for use in a CDMA fibre optic LAN. Manchester: UMIST, 1995.

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Частини книг з теми "Optical orthogonal codes (OOC)"

Omrani, Reza, Oscar Moreno, and P. Vijay Kumar. "Topics on Optical Orthogonal Codes." In Sequences and Their Applications - SETA 2004, 396–405. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11423461_30.

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Wu, Dianhua, Jiayun Cao, and Pingzhi Fan. "New Optimal Variable-Weight Optical Orthogonal Codes." In Sequences and Their Applications – SETA 2010, 102–12. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-15874-2_8.

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Bitan, Sara, and Tuvi Etzion. "On constructions for optimal optical orthogonal codes." In Algebraic Coding, 111–25. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/3-540-57843-9_13.

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Omrani, Reza, Petros Elia, and P. Vijay Kumar. "New Constructions and Bounds for 2-D Optical Orthogonal Codes." In Sequences and Their Applications - SETA 2004, 389–95. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11423461_29.

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Alderson, T. L., and Keith E. Mellinger. "Optical orthogonal codes from Singer groups." In Series on Coding Theory and Cryptology, 51–69. WORLD SCIENTIFIC, 2007. http://dx.doi.org/10.1142/9789812772022_0004.

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Тези доповідей конференцій з теми "Optical orthogonal codes (OOC)"

Ji, Jianhua, Zhao Luo, Hongxia Zheng, Wenjun Li, Ke Wang, Ming Xu, and Shuwen Yang. "A new family of two-dimensional optical orthogonal codes with zero cross-correlation zone." In 2015 Optoelectronics Global Conference (OGC). IEEE, 2015. http://dx.doi.org/10.1109/ogc.2015.7336824.

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Chee, Yeow Meng, Han Mao Kiah, San Ling, and Hengjia Wei. "Geometric orthogonal codes better than optical orthogonal codes." In 2017 IEEE International Symposium on Information Theory (ISIT). IEEE, 2017. http://dx.doi.org/10.1109/isit.2017.8006758.

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Khurana, Ritu, and Gurjit Kaur. "Performance comparison of OOC codes at various receivers for OCDMA system." In 2010 10th International Conference on Laser and Fiber-Optical Networks Modeling (LFNM). IEEE, 2010. http://dx.doi.org/10.1109/lfnm.2010.5624239.

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Moreno, O., P. V. Kumar, Hsiao-feng Lu, and R. Omrani. "New constructions for optical orthogonal codes, distinct difference sets and synchronous optical orthogonal codes." In IEEE International Symposium on Information Theory, 2003. Proceedings. IEEE, 2003. http://dx.doi.org/10.1109/isit.2003.1228342.

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Martirosyan, Samvel, A. J. Han Vinck, and Ashot N. Harutyunyan. "On Optical Orthogonal, Cyclically Permutable, and Super Optical Orthogonal Codes." In 2007 IEEE International Symposium on Information Theory. IEEE, 2007. http://dx.doi.org/10.1109/isit.2007.4557579.

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Zhao, Na, and Nam Yul Yu. "Design of new fingerprinting codes using optical orthogonal codes." In 2015 21st Asia-Pacific Conference on Communications (APCC). IEEE, 2015. http://dx.doi.org/10.1109/apcc.2015.7412529.

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Taketomi, Yoshinao, Joseph E. Ford, Hironori Sasaki, Jian Ma, Yeshayahu Fainman, Sing H. Lee, and Jack Feinberg. "Hologram multiplexing using orthogonal phase codes and incremental recording." In Optical Computing. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/optcomp.1991.wa2.

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Анотація:

Photorefractive volume holography may prove useful for optical interconnection and data storage applications. However, the process of recording a set of uniform, high quality superimposed holograms normally involves a complicated recording procedure using a schedule calculated from the detailed material characteristics1,2. A small error in material characterization (or change in the material characteristics) can result in highly nonuniform diffraction efficiencies. In this paper, we present a new incremental recording approach that relies only on an approximate knowledge of the materials characteristics. By avoiding long exposures, we avoid the high gain and fanning which tend to disrupt photorefractive performance. To achieve the highly repeatable recording necessary for this approach we use a set of orthogonal phase images for the reference beams. This choice minimizes readout of any unwanted images. The phase only reference images will be more reproducible when generated by a stationary phase spatial light modulator, compared to angular multiplexing. Compared to the simple sequential schedule of recording, the use of phase-coded reference beams and incremental recording of the holograms should produce brighter images with an improved signal-to-noise ratio.

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Omrani, R., H. Lu, O. Moreno, and P. V. Kumar. "Construction of low density parity check codes from optical orthogonal codes." In IEEE International Symposium on Information Theory, 2003. Proceedings. IEEE, 2003. http://dx.doi.org/10.1109/isit.2003.1228074.

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Chung, Jin-Ho, and Kyeongcheol Yang. "New construction of asymptotically optimal optical orthogonal codes." In 2015 IEEE Information Theory Workshop - Fall (ITW). IEEE, 2015. http://dx.doi.org/10.1109/itwf.2015.7360748.

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Maity, Goutam Kumar, and Santi P. Maity. "Realization of orthogonal codes in optical information processing." In 2012 Third International Conference on Emerging Applications of Information Technology (EAIT). IEEE, 2012. http://dx.doi.org/10.1109/eait.2012.6407930.

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