Global ETD Search
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 83 for “"Coding schemes."”.
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On the construction of some capacity-approaching coding schemes
… based on novel memoryless joint source-channel coding schemes. We first show some examples of sources and channels where no coding is optimal for all values of the signal~to-noise ratio (SNR). When the source bandwidth is greater than the channel bandwidth, joint coding schemes based on …
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Near-optimal inversion of incoherent scatter radar measurements: coding schemes, processing techniques, and experiments
… This work focuses on developing a modern coding scheme and inversion methodology using Arecibo incoherent scatter radar (ISR) to achieve efficient, and near-optimal estimates of the key ionospheric parameters. In particular, this work considers two aspects of the ISR inversion problem: (i) …
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Evaluation of coding scheme for MIMO radar
… diversity. This thesis explores the potential of coding schemes for MIMO Radar. The ambiguity functions measures related to MIMO Radar are used to evaluate how much diversity gain can be coherently achieved with certain coding schemes. The results of this analysis show that the cross correlation …
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Turbo space-time coding for mimo systems : designs and analyses
… this dissertation studies turbo space-time coding schemes for MIMO systems. Before the designs of turbo space-time codes are presented, a fundamental tool to analyze and design turbo coding schemes, the extrinsic information transfer (EXIT) chart method, is extended from the binary/nonbinary …
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Low frequency cutoff effects in fiber optic communication systems
… problem. They are quantized feedback and line coding schemes. A detailed performance evaluation of quantized feedback scheme is performed. An overview of line coding schemes is given and some specific codes are evaluated in terms of S/N degradation at the receiver.
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Coding Strategies for Combating Interference on Point-to-Point and Multiple Access Channels
… noise power on the channel. We detail lattice coding strategies for this channel. We also consider discrete memoryless state-dependent channels where there exists a helper who is the sole party in the communication setup having knowledge of the channel state. We devise coding schemes for such …
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Joint design of multi-resolution codes and intra / inter- layer network coding
… study the joint design of multi-resolution (MR) coding and network coding. The three step coding process consists of MR source coding, layer coding and multi-stream coding. The source coding considers the allocation of codeword length to the two layers and use base layer percentage as the …
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Improving the energy efficiency and reliability of wireless sensor networks using coding techniques
… these two challenges, this thesis proposes new coding schemes and communication protocols, a novel paradigm for information acquisition, and the design and implementation of specific, circuits architectures. The reliability and energy efficiency trade-offs of splitting the inserted redundancy in …
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Coding for emerging archival storage media
… and development. Error Correcting Codes and coding schemes must be designed for these emerging media’s constraints and noise characteristics, similar to the large body of work on coding for communication applications. Unlike communication standards, digital data storage, primarily archival, …
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Variable block length coding for channels with feedback and cost constraints
Variable-decoding-time/generalized block-coding schemes are investigated for discrete memoryless channels (DMC) with perfect feedback (error free, delay free, infinite capacity) under cost constraints. For a given number of messages and average error probability, upper and lower bounds are found …
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Modelling the synaptic plasticity underlying habituation, sensitization and classical conditioning of the Aplysia Californica Gill Siphon withdrawal reflex
… included is a brief description of some neural coding schemes. The next chapter explains the basic functioning of synapses and introduces some common forms of synaptic plasticity. This is followed by a discussion of some properties of learning and memory. Note that these chapters are intended as …
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Objective assessment of audio quality using an auditory processing model
… audio have been processed different lossy coding schemes. 3, an alternative for evaluation high schemes proposed, estimates detection thresholds distortions psychoacoustically. simulation performed psychoacoustic experiments model yields correlation with measured data. Finally, 4 …
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Grandparents as Interaction and Social Support Agents in Infancy
… were scored using both time-sampling and global coding schemes. Information on grandparental support to the young parents and infant, relative to other social support sources, were also obtained from grandparents and parents.
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Performance evaluation of packet video transfer over local area networks
… Implementation methods are discussed for coding schemes, including data compression, the network interface unit, and the underlying local area network (LAN), Ethernet or the Fiber Distributed Data Interface (FDDI). Performance evaluation is presented using simulation results and analyses …
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Investigating collaboration in art and technology
… the analysis. During the analysis process, two coding schemes, which are the context analysis coding scheme and the protocol analysis coding scheme, were developed, evaluated and refined over a series of case studies. Using the coding schemes, the results of the analysis drawn from different …
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Iterative Algebraic Decoding of Codes Defined on Graphs
Furthermore, we propose novel error correction coding schemes, called Generalized Integrated Interleaving and Sparsely Integrated Interleaving codes. In the context of block interleaved codewords, Generalized Integrated Interleaving allows nonuniform redundancy to be shared among all the …
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CONCEPTUAL UNDERSTANDING AND THE USE OF HAND-SKETCHING IN MECHANICAL ENGINEERING DESIGN
… and final reports were analyzed with sketch coding schemes, including the New Content-Based Sketch Coding Scheme that was created for this research. The "Mechanical Engineering Visual Design Mediums Concept Inventory" was created to begin to understand the current role of sketching and …
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Applying network coding to TCP
… a new TCP-like protocol, CTCP, that uses network coding to provide better network use of the network bandwidth in a wireless environment. CTCP provides the same guarantees as TCP whilst providing significant enhancements to previous TCP implementations, such as permitting multipath packet …
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