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 9 of 9 for “"secrecy capacity"”.
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New Method for Directional Modulation Using Beamforming: Applications to Simultaneous Wireless Information and Power Transfer and Increased Secrecy Capacity
… these systems must have sufficient information capacity and secrecy capacity while typically maintaining small size, light weight, and minimized power consumption. With increasing crowding of the electromagnetic spectrum, interference must be leveraged as an available resource. This work …
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Generating secret in a network
… of mutual dependence is established for the secrecy capacity, as a natural generalization of Shannon's mutual information to the multivariate case. Under linear-type source models, this capacity can be achieved practically by linear network codes. In addition to being an unusual application …
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Algorithms and architecture for multiusers, multi-terminal, multi-layer information theoretic security
… they all want separate messages are studied and capacity results are established in several special cases. When each receiver wants a separate independent message, an opportunistic scheme that transmits to the strongest user at each time, and uses Gaussian codebooks is shown to achieve the sum …
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Capacities of erasure networks
… investigated, in various multiple senses, the “capacity” of several models of erasure networks. The defining characteristic of a memoryless erasure network is that each channel between any two nodes is an independent erasure channel. The models that we explore differ in the absence or presence …
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Nonparametric Anomaly Detection and Secure Communication
… In the first model, layered decoding and layered secrecy are required, i.e., each receiver decodes one more message than the receiver with one level worse channel quality, and this message should be kept secure from all receivers with worse channel qualities. In the second model, secrecy only …
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Physical layer encryption using fixed and reconfigurable antennas
… shows that jointly designing for reliability and secrecy at the physical layer may be a better solution. Physical layer encryption involves techniques that ensure a signal is information-theoretically secure, meaning that an eavesdropper with infinite time and computational resources will not be …
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Wireless Throughput and Energy Efficiency under QoS Constraints
… the throughput is determined. In particular, secrecy capacity is used to describe the service rate of buffers containing confidential messages. Moreover, energy efficiency is studied in the low signal-to-noise (SNR) regime.</p> <p>In the final part of the thesis, throughput and energy …
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Wireless Physical Layer Security: Towards Practical Assumptions and Requirements
… layer security on impractical assumptions. The secrecy enhancements and analysis based on impractical assumptions cannot lead to any true guarantee of secrecy in practical networks. The current study of physical layer security was often based on the idealized assumption of perfect channel …
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Wireless Physical Layer Security: Towards Practical Assumptions and Requirements
… layer security on impractical assumptions. The secrecy enhancements and analysis based on impractical assumptions cannot lead to any true guarantee of secrecy in practical networks. The current study of physical layer security was often based on the idealized assumption of perfect channel …