Littérature scientifique sur le sujet « Codes orthogonaux »
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Articles de revues sur le sujet "Codes orthogonaux"
Yen, Chih-Ta, Ing-Jr Ding et Cheng-Mu Tsai. « PERFORMANCE ANALYSIS OF SEVERAL QUASI-ORTHOGONAL CODES OPTICAL CDMA FOR RADIO-OVER-FIBER SYSTEM ». Transactions of the Canadian Society for Mechanical Engineering 37, no 3 (septembre 2013) : 415–26. http://dx.doi.org/10.1139/tcsme-2013-0031.
Texte intégralMienkina, Martin P., Claus-Stefan Friedrich, Nils C. Gerhardt, Martin F. Beckmann, Martin F. Schiffner, Martin R. Hofmann et Georg Schmitz. « Multispectral photoacoustic coded excitation imaging using unipolar orthogonal Golay codes ». Optics Express 18, no 9 (15 avril 2010) : 9076. http://dx.doi.org/10.1364/oe.18.009076.
Texte intégralTong, Ling, Qiong He, Alejandra Ortega, Alessandro Ramalli, Piero Tortoli, Jianwen Luo et Jan D’hooge. « Coded Excitation for Crosstalk Suppression in Multi-line Transmit Beamforming : Simulation Study and Experimental Validation ». Applied Sciences 9, no 3 (31 janvier 2019) : 486. http://dx.doi.org/10.3390/app9030486.
Texte intégralWirastuti, N. M. A. E. D., I. M. A. Suyadnya et D. C. Khrisne. « Performance Assessment of OFDM System using Reed-Solomon Codes over Fading Channels ». Journal of Electrical, Electronics and Informatics 2, no 2 (31 août 2018) : 48. http://dx.doi.org/10.24843/jeei.2018.v02.i02.p06.
Texte intégralGrolmusz, Vince. « Co-Orthogonal Codes ». Designs, Codes and Cryptography 38, no 3 (mars 2006) : 363–72. http://dx.doi.org/10.1007/s10623-005-1495-4.
Texte intégralChee, Yeow Meng, Han Mao Kiah, San Ling et Hengjia Wei. « Geometric Orthogonal Codes of Size Larger Than Optical Orthogonal Codes ». IEEE Transactions on Information Theory 64, no 4 (avril 2018) : 2883–95. http://dx.doi.org/10.1109/tit.2017.2788140.
Texte intégralAsif, Muhammad, Wuyang Zhou, Qingping Yu, Xingwang Li et Nauman Ali Khan. « A Deterministic Construction for Jointly Designed Quasicyclic LDPC Coded-Relay Cooperation ». Wireless Communications and Mobile Computing 2019 (26 septembre 2019) : 1–12. http://dx.doi.org/10.1155/2019/5249373.
Texte intégralKim, Dong-Hoon, Hyung-Jung Kim et Jae-Han Lim. « Design of Optimized Coded LFM Waveform for Spectrum Shared Radar System ». Sensors 21, no 17 (28 août 2021) : 5796. http://dx.doi.org/10.3390/s21175796.
Texte intégralBASSA, Alp, et Nesrin TUTAŞ. « Extending self-orthogonal codes ». TURKISH JOURNAL OF MATHEMATICS 43, no 5 (28 septembre 2019) : 2177–82. http://dx.doi.org/10.3906/mat-1905-103.
Texte intégralGustavsson, B., et T. Grydeland. « Orthogonal-polarization alternating codes ». Radio Science 44, no 6 (décembre 2009) : n/a. http://dx.doi.org/10.1029/2008rs004132.
Texte intégralThèses sur le sujet "Codes orthogonaux"
Baechler, Brice. « Analyse et détermination de codes doublement orthogonaux pour décodage itératif ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0019/MQ57390.pdf.
Texte intégralCardinal, Christian. « Décodage à seuil itératif sans entrelacement des codes convolutionnels doublement orthogonaux ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/NQ65537.pdf.
Texte intégralOuadid, Abdelkarim. « Prototype micro-électronique d'un décodeur itératif pour des codes doublement orthogonaux ». Mémoire, École de technologie supérieure, 2004. http://espace.etsmtl.ca/715/1/OUADID_Abdelkarim.pdf.
Texte intégralDru, Frédéric. « Décodage à seuil itératif des codes convolutionnels doublement orthogonaux perforés et application aux modulations multiniveaux ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ65572.pdf.
Texte intégralGrandpierre, Benoît. « Produits automorphes, classification des réseaux et théorie du codage ». Electronic Thesis or Diss., Lille 1, 2009. http://www.theses.fr/2009LIL10019.
Texte intégralBorcherds’ [Phi]12 function is a modular form in 26 variables for the orthogonal group O+(II2,26) and the character determinant, of singular weight 12, it was constructed by Borcherds in 1994 together with the automorphic products theory. It determines the Fake Monster Lie Algebra, which plays the fundamental role in the proof of the Moonshine Conjecture. [Phi]12 is also a reflective form (its zeros are hyperplans of orthogonal reflections in O+(II2,26)). Many examples were constructed by Borcherds, and Nikulin has proved there is, in principle, only a finite number of reflective modular forms. Gritsenko and Nikulin classified reflective modular forms in the case of maximal lattices of signature (1,2) (1998-2002). Other important examples of reflective forms of singular weight were constructed by N. Scheithauer (2000 - 2005). The classification of reflective modular forms is a very important question, such forms have many applications in different fields of mathematics and physics : in the theory of Kac-Moody algebras, in algebraic geometry, in string theory... In this thesis, we describe a new class of reflective forms related to the Borcherds’function [Phi]12. The signature of the orthogonal groups we consider goes between (2,3) and (2,25). All the forms we obtain are quasi pull-back of [Phi]12. This arithmetic method gives more than 60 reflective modular forms, the first of them being the Siegel modular form of weight 35 constructed by Igusa in 1964
Grandpierre, Benoît. « Produits automorphes, classification des réseaux et théorie du codage ». Thesis, Lille 1, 2009. http://www.theses.fr/2009LIL10019/document.
Texte intégralBorcherds’ [Phi]12 function is a modular form in 26 variables for the orthogonal group O+(II2,26) and the character determinant, of singular weight 12, it was constructed by Borcherds in 1994 together with the automorphic products theory. It determines the Fake Monster Lie Algebra, which plays the fundamental role in the proof of the Moonshine Conjecture. [Phi]12 is also a reflective form (its zeros are hyperplans of orthogonal reflections in O+(II2,26)). Many examples were constructed by Borcherds, and Nikulin has proved there is, in principle, only a finite number of reflective modular forms. Gritsenko and Nikulin classified reflective modular forms in the case of maximal lattices of signature (1,2) (1998-2002). Other important examples of reflective forms of singular weight were constructed by N. Scheithauer (2000 - 2005). The classification of reflective modular forms is a very important question, such forms have many applications in different fields of mathematics and physics : in the theory of Kac-Moody algebras, in algebraic geometry, in string theory... In this thesis, we describe a new class of reflective forms related to the Borcherds’function [Phi]12. The signature of the orthogonal groups we consider goes between (2,3) and (2,25). All the forms we obtain are quasi pull-back of [Phi]12. This arithmetic method gives more than 60 reflective modular forms, the first of them being the Siegel modular form of weight 35 constructed by Igusa in 1964
Odhiambo, Michael Derrick. « Spatial data focusing using direct sequence spread spectrum modulation ». Electronic Thesis or Diss., Sorbonne université, 2021. http://www.theses.fr/2021SORUS060.
Texte intégralThis work proposes the implementation of Spatial Data Focusing (SDF) using spread spectrum techniques. SDF was recently proposed as a candidate alternative to classical power focusing schemes in wireless geocasting applications. Unlike power focusing approaches where radiated power is directed to a defined direction, in SDF, it is the data to be transmitted that is processed in such a manner that it can only be decoded at a predefined location. This work exploits the dual orthogonality due to classical quadrature components and orthogonal Gold spreading sequences to design the IQ and spread spectrum based spatial data focusing (DSSS-SDF-IQ) scheme. It is demonstrated that SDF attains better spatial selectivity than classical power focusing for a given antenna array size. The robustness of the proposed scheme is subsequently demonstrated by implementing it over a classical Urban Canyon 6-ray multipath channel model, where it is shown that the scheme can exhibit beamwidth as narrow as 1 degree with only a 4-antenna array. In SDF, the beamwidth is defined as the area within which data can be decoded as opposed to classical half power beamwidth. Chapter 1 introduces the concept of geocasting. Chapter 2 reviews the different techniques that enable directional capabilities on base stations. Chapter 3 introduces the principles of direct sequence spread spectrum based SDF. Chapter 4 investigates the influence of multipath channel on DSSS-SDF scheme. For all the cases studied above, relevant simulations are implemeneted to validate the discussions. Chapter 5 summarizes the work with a conclusion and perspective on possible future research directions
Semerciler, Salih. « Coded orthogonal signaling ». Thesis, Monterey, California. Naval Postgraduate School, 1992. http://hdl.handle.net/10945/23567.
Texte intégralMerensky, Alexander Mark. « A multi-dimensional code-division-multiplexed OFDMA modem using cyclic rotated orthogonal complete complementary codes ». Diss., University of Pretoria, 2012. http://hdl.handle.net/2263/31146.
Texte intégralBoussebt, 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.
Texte intégralThe 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
Livres sur le sujet "Codes orthogonaux"
Semerciler, Salih. Coded orthogonal signaling. Monterey, Calif : Naval Postgraduate School, 1992.
Trouver le texte intégralLiang, Guan Yong, et Tjhung Tjeng Thiang, dir. Quasi-orthogonal space-time block code. London : Distributed by World Scientific, 2007.
Trouver le texte intégralStevens, Janet Emerson. Trellis coded modulation applied to orthogonal signals. Monterey, Calif : Naval Postgraduate School, 1993.
Trouver le texte intégralPetroutsos, Alexander. Optical orthogonal codes for use in a CDMA fibre optic LAN. Manchester : UMIST, 1995.
Trouver le texte intégralRoderick, David V. A coded orthogonal frequency division multiplexing simulation of a high data rate, line-of-sight, digital radio for mobile maritime communications. Monterey, Calif : Naval Postgraduate School, 1997.
Trouver le texte intégral1952-, Hanzo Lajos, dir. OFDM and MC-CDMA for broadband multi-user communications, WLANs, and broadcasting. [Piscataway, N.J.] : IEEE Press, 2003.
Trouver le texte intégralBattle of wits : The complete story of codebreaking in World War II. New York : Simon & Schuster, 2002.
Trouver le texte intégralBudiansky, Stephen. Battle of wits : The complete story of codebreaking in World War II. New York : Free Press, 2000.
Trouver le texte intégralBudiansky, Stephen. Battle of wits : The complete story of codebreaking in World War II. New York : Free Press, 2000.
Trouver le texte intégralBattle of wits : The complete story of codebreaking in World War II. New York : Free Press, 2000.
Trouver le texte intégralChapitres de livres sur le sujet "Codes orthogonaux"
Grolmusz, Vince. « Co-orthogonal Codes ». Dans Lecture Notes in Computer Science, 144–52. Berlin, Heidelberg : Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/3-540-45655-4_17.
Texte intégralMienkina, M. P., C. S. Friedrich, N. C. Gerhardt, M. R. Hofmann et Georg Schmitz. « Multispectral Photoacoustic Coded Excitation using Orthogonal Unipolar Golay Codes ». Dans IFMBE Proceedings, 217–20. Berlin, Heidelberg : Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-03879-2_61.
Texte intégralMonroe, Laura. « Self-Orthogonal Greedy Codes ». Dans Codes, Designs and Geometry, 75–79. Boston, MA : Springer US, 1996. http://dx.doi.org/10.1007/978-1-4613-1423-3_7.
Texte intégralTamm, Ulrich. « Communication complexity and orthogonal polynomials ». Dans Codes and Association Schemes, 277–85. Providence, Rhode Island : American Mathematical Society, 2001. http://dx.doi.org/10.1090/dimacs/056/21.
Texte intégralOmrani, Reza, Oscar Moreno et P. Vijay Kumar. « Topics on Optical Orthogonal Codes ». Dans Sequences and Their Applications - SETA 2004, 396–405. Berlin, Heidelberg : Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11423461_30.
Texte intégralFumy, W. « Orthogonal transform encoding of cyclic codes ». Dans Algebraic Algorithms and Error-Correcting Codes, 131–34. Berlin, Heidelberg : Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/3-540-16776-5_715.
Texte intégralHedayat, A. S., N. J. A. Sloane et John Stufken. « Orthogonal Arrays and Error-Correcting Codes ». Dans Springer Series in Statistics, 61–86. New York, NY : Springer New York, 1999. http://dx.doi.org/10.1007/978-1-4612-1478-6_4.
Texte intégralHedayat, A. S., N. J. A. Sloane et John Stufken. « Construction of Orthogonal Arrays from Codes ». Dans Springer Series in Statistics, 87–111. New York, NY : Springer New York, 1999. http://dx.doi.org/10.1007/978-1-4612-1478-6_5.
Texte intégralWu, Dianhua, Jiayun Cao et Pingzhi Fan. « New Optimal Variable-Weight Optical Orthogonal Codes ». Dans 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.
Texte intégralBitan, Sara, et Tuvi Etzion. « On constructions for optimal optical orthogonal codes ». Dans Algebraic Coding, 111–25. Berlin, Heidelberg : Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/3-540-57843-9_13.
Texte intégralActes de conférences sur le sujet "Codes orthogonaux"
Harman, S. A. « Orthogonal polyphase code sets with master codes ». Dans 2004 International Waveform Diversity & Design Conference. IEEE, 2004. http://dx.doi.org/10.1109/iwddc.2004.8317552.
Texte intégralWu, Weiqi, Ammar Hawbani et Wei Gong. « Ortho-CodeA : Orthogonal Codes Assisted Backscatter Multiple Access ». Dans 2023 IEEE International Conference on Pervasive Computing and Communications (PerCom). IEEE, 2023. http://dx.doi.org/10.1109/percom56429.2023.10099216.
Texte intégralChee, Yeow Meng, Han Mao Kiah, San Ling et Hengjia Wei. « Geometric orthogonal codes better than optical orthogonal codes ». Dans 2017 IEEE International Symposium on Information Theory (ISIT). IEEE, 2017. http://dx.doi.org/10.1109/isit.2017.8006758.
Texte intégralCardinal, Christian, et Bakitanga-Florian Mvutu. « Coded M-PSK Modulation using Convolutional Self-Doubly Orthogonal Codes ». Dans 2009 IEEE 69th Vehicular Technology Conference Spring. IEEE, 2009. http://dx.doi.org/10.1109/vetecs.2009.5073447.
Texte intégralWen, James Z., Yang Tao et Xiangyang Yang. « Crosstalk in phase-coded holographic memories using different orthogonal codes ». Dans Optical Science, Engineering and Instrumentation '97, sous la direction de Francis T. S. Yu et Shizhuo Yin. SPIE, 1997. http://dx.doi.org/10.1117/12.287776.
Texte intégralGevers, Martin, Patrik Gebhardt, Michael Vogt et Thomas Musch. « Code-division-multiplexing using orthogonal codes for fast electrical impedance tomography ». Dans 2014 IEEE International Instrumentation and Measurement Technology Conference (I2MTC). IEEE, 2014. http://dx.doi.org/10.1109/i2mtc.2014.6860919.
Texte intégralLiva, Gianluigi, Balazs Matuz, Enrico Paolini et Mark F. Flanagan. « Non-binary LDPC codes for orthogonal modulations : Analysis and code design ». Dans ICC 2017 - 2017 IEEE International Conference on Communications. IEEE, 2017. http://dx.doi.org/10.1109/icc.2017.7996749.
Texte intégralKim, Sang-Min, Jae-Hee Song et Tai-Kyong Song. « Harmonic Golay coded excitation using mutually orthogonal Golay codes and pulse inversion ». Dans SPIE Medical Imaging, sous la direction de Stephen A. McAleavey et Jan D'hooge. SPIE, 2009. http://dx.doi.org/10.1117/12.811550.
Texte intégralMienkina, Martin P., Annika Eder, Georg Schmitz, Claus-Stefan Friedrich, Nils C. Gerhardt et Martin R. Hofmann. « Feasibility study of multispectral photoacoustic coded excitation using orthogonal unipolar Golay codes ». Dans 2009 IEEE International Ultrasonics Symposium. IEEE, 2009. http://dx.doi.org/10.1109/ultsym.2009.5441941.
Texte intégralIhan Martoyo, Philip, Andi Susanto, Eddy Wijanto, Herman Kanalebe et Kuniwati Gandi. « Chaos codes vs. orthogonal codes for CDMA ». Dans Applications (ISSSTA). IEEE, 2010. http://dx.doi.org/10.1109/isssta.2010.5652316.
Texte intégralRapports d'organisations sur le sujet "Codes orthogonaux"
Kondrashov, Dmitri, Joseph Wang et Paulette C. Liewer. A Study of Stability and Energy Conservation of a 3-D Electromagnetic PIC Code for Non-Orthogonal Meshes. Fort Belvoir, VA : Defense Technical Information Center, janvier 1997. http://dx.doi.org/10.21236/ada357700.
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