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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 3004 for “"codes"”.
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Euclidean space codes as space-time block codes
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001.
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Spinal codes
Spinal codes are a new class of rateless codes that enable wireless networks to cope with time-varying channel conditions in a natural way, without requiring any explicit bit rate selection. The key idea in the code is the sequential application of a pseudo-random hash function to the message bits, …
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Concatenated codes.
Massachusetts Institute of Technology. Dept. of Electrical Engineering. Thesis. 1965. Sc.D.
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Constructing CSS-T Codes from Extended Quasi-Cyclic Codes
We analyze a construction of quasi-cyclic codes in an extension field based on the polynomials which generate the corresponding codes in the base fields. We establish a set of code operations on which trace relationships between extended quasi-cyclic codes are the same as the operations taken on …
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Codes of Interaction
<p>The ideas within this thesis are meant to clarify my explorations, research and painting practice during my studies at Virginia Commonwealth University. I expand on my general statements about being fascinated by advancing technologies and concerned about the after effects of these advancements. …
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GMD Decoding of Euclidean -Space Codes and Iterative Decoding of Turbo Codes
Using the bifurcation theory, the qualitative transition of phase trajectories in the waterfall region is associated with the bifurcation of certain fixed points. This connection explains the dramatic improvement of performance in the waterfall region, and leads to a better understanding of the …
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New Codes Beyond the Zyablov Bound and the Goppa-Based Justesen Codes
Made available in DSpace on 2014-12-14T13:09:40Z (GMT). No. of bitstreams: 1 7913515.pdf: 1850100 bytes, checksum: f82da4504281f7376dd1c7f8791f209f (MD5) Previous issue date: 1978
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Quantum Algebraic Geometry Codes
… the construction of quantum error correction codes derived from classical algebraic geometry (AG) codes. We present two distinct construction techniques, highlighting the flexibility and self-orthogonality of AG codes, and demonstrate their ability to produce asymptotically good quantum codes. …
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Aufzählen von DNA-Codes
… Arbeit wird ein Modell zum Aufzählen von DNA-Codes entwickelt. Indem eine Ordnung auf der Menge aller DNA-Codewörter eingeführt und auf die Menge aller Codes erweitert wird, erlaubt das Modell das Auffinden von DNA-Codes mit bestimmten Eigenschaften, wie Überlappungsfreiheit, Konformität, …
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Error correcting binary codes
… 3, and 5, we are primarily concerned with linear codes in which the encoder is a linear transformation of then dimensional vector space containing the message vectors into the vector space of dimension n + k, such that certain errors can be located or at least detected. In Chapter 1, we give the …
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Graphs, codes, and colorings
Item withdrawn by Alexis Thompson (athmpsn1@illinois.edu) on 2010-11-24T20:52:49Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 1 Kantor_Ida.pdf: 588064 bytes, checksum: ed396002d8eb12e47e04cf8040eb7e99 (MD5)
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Symmetries of trellis codes
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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Codes as Constitution: The Development of the Biblical Law-Codes from Monarchy to Theocracy
… been categorised in recent study as ancient law-codes analogous to the cuneiform codes recovered from the ancient Near East. This has not led, however, to a more constructive and decisive stage in the study of biblical law, and conceptual and methodological problems have been imported from each …
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On Dihedral Codes and the Double Circulant Conjecture for Binary Extended Quadratic Residue Codes
… identify the binary extended quadratic residue codes of length 2k as principal left ideals in the group algebra F2Dk where Dk is the dihedral group of order 2 k. We prove that these codes have a double circulant presentation in the following three cases: (1) q = 1. (2) q is a prime and 2 is a …
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An Information Theoretic Study on Linear Dispersion Codes and Low -Density Parity -Check Codes
… theoretic study of linear dispersion (LD) codes and low-density parity-check (LDPC) codes. For bit-linear LD codes, we find necessary and sufficient conditions on the dispersion matrices for the a posteriori distribution of the information bit vector to be a product distribution. We also …
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Optimal Codes and Entropy Extractors
… and a study of the properties of Hadamard codes. We find of particular interest the Griesmer bound, which is a strong result known to be true only for linear codes. We try to extend it to all codes, and we can determine many parameters for which the Griesmer bound is true also for nonlinear …
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Robustness of Variable Length Codes
… the robustness of certain variable length codes in the presence of channel errors. The codes studied are: Huffman, Huffman equivalent, and T-codes. The algorithm used to construct each code is presented, together with appropriate methods of modifying the constructed code. The …
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Unequal Error Protection Raptor Codes
We design Unequal Error Protection (UEP) Raptor codes with the UEP property provided by the precode part of Raptor codes which is usually a Low Density Parity Check (LDPC) code. Existing UEP Raptor codes apply the UEP property on the Luby transform (LT) code part of Raptor codes. This approach …
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