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 18 of 18 for “"Shannon Capacity"”.
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Conditional dependence via Shannon capacity: axioms, estimators and applications
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2017-02-28 without embargo terms
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Local network coding on packet erasure channels -- From Shannon capacity to stability region
… from the continuing theoretic development of NC capacity, e.g., the Shannon capacity results for the single-flow multi-cast network and the packet erasure broadcast channel with feedback. However, characterizing the capacity for the practical wireless multi-flow network setting remains a …
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Effective Resource Allocation for Non-cooperative Spectrum Sharing
… However, prior analysis has focussed on Shannon capacity as the utility function, even though it is known that real signals do not, in general, meet the Gaussian distribution assumptions of that metric. In a non-cooperative spectrum sharing environment, the Shannon capacity utility …
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Information Theoretic Limits for Secure Multimedia and Magnetic Recording
… this thesis addresses the problem of finding the capacity of two-dimensional (1, infinity) constrained channels for a binary alphabet. The Shannon capacity of a constrained channel is generalized to a notion of soft capacity which allows violations of the constraint. By drawing an analogy with an …
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Turbo space-time coded modulation : principle and performance analysis
… invention of turbo codes. Turbo codes approach Shannon capacity by displaying the properties of long random codes, yet allowing efficient decoding. Coding alone, however, cannot fully address the problem of multipath fading channel. Recent advances in information theory have revolutionized the …
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Information theoretic parameters for graphs and operator systems
… one of which is seen to be an upper bound on the Shannon capacity of an associated quantum channel. <br/><br/>Finally we return to examine graph entropy in the case of a non-i.i.d. classical source, and attempt to generalise the Kolmogorov-Sinai entropy of a dynamical system to this setting.<br/>
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In defense of wireless carrier sense
… case, based upon radio propagation theory and Shannon capacity. We argue from our model that common notions about carrier sense, such as the hidden and exposed terminal phenomena, are inherently misleading in the context of adaptive bitrate, casting in black and white terms effects that often …
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Spinal codes
… polynomial in the message size and achieves the Shannon capacity over both additive white Gaussian noise (AWGN) and binary symmetric channel (BSC) models. The decoder trades off throughput for computation (hardware area or decoding time), allowing the decoder to scale gracefully with available …
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Design of energy-efficient ultrasonic communication systems on steel pipes
… transmitted bit, can be far more important than Shannon capacity, for such battery-powered, relatively inaccessible links. This work focuses on the low-rate, total life-time energy-limited regime to maximize battery life, while maintaining reliable information transfer at a nominal average rate. …
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Medium Access Control and Adaptive Transmission Techniques in Wireless Networks
… where each user individually achieves the Shannon capacity. The derived bounds serve as benchmarks against which adaptive CDMA systems can be compared.
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Anytime information theory
… Markov random process through a finite capacity noisy channel so as to have finite average squared error from end-to-end. On the source side, we give a coding theorem for such unstable processes that shows that we can achieve the rate-distortion bound even in the infinite horizon case if …
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Interference Management in Heterogeneous Cellular Networks
… in HetNets becomes one of the major obstacles to capacity improvement and coverage enhancement. In this thesis, analytical approaches are developed to investigate interference statistics and the performance of 2-tier HetNets including coverage probability and spectral efficiency in mathematical …
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Decentralized Inference and its Application to Network Localization and Navigation
… settings, we derive a relationship between Shannon information and Fisher information for decentralized inference. Then, based on results for two-node systems, we characterize the behavior of decentralized inference error in multi-node networks with general channel models. We establish both …
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LP/SDP hierarchy lower bounds for decoding random LDPC codes
… d, variables) are well-known to achieve the Shannon capacity of the binary symmetric channel (for sufficiently large dv, and dc,) under exponential time decoding. However, polynomial time algorithms are only known to correct a much smaller fraction of errors. One of the most powerful …
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Interference Mitigation for Cellular Networks: Fundamental Limits and Applications
… power splitting strategy achieves the capacity region to within 2 bits in the weak interference regime. For the special 3-user case, this gap can be sharpened to 1 1 2 bits by the time-sharing technique. Second, it is shown that for a two-user Gaussian interference channel with an …
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Influence of the Number of Degrees of Freedom on the Capacity of Incoherent Optical Fiber Communication Systems
… of this dissertation is to find the channel capacity in optical fiber communication systems when incoherent detection is used with single (polarization filtering) and two-polarizations (no polarization filtering). Optical fiber systems employ photodetectors that convert optical intensity to …
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Information theory and mereology with applications to biology
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-02-04 without embargo terms
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Low-Complexity Algorithms for Channel Estimation in Optimised Pilot-Assisted Wireless OFDM Systems
… (MIMO) channels, can theoretically achieve near Shannon capacity of the communication link. However, the high-rate and spectrumefficient system implementation requires coherent detection at the receiving end that is possible only when accurate channel state information (CSI) is available. Since …