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 187 for “"relaying"”.
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Protective Relaying Student Laboratory
<p>Facing a rapidly-changing power industry, the electrical engineering department at Cal Poly San Luis Obispo proposed Advanced Power Systems Initiatives to better prepare its students for entering the power industry. These initiatives call for the creation of a new laboratory curriculum that uses …
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CubeSat Constellation Analysis for Data Relaying
<p>Current CubeSat communication technology limits the amount of time, and number of accesses with ground stations. It has been proposed to use a constellation of CubeSats to improve relay performance and increase the number of accesses between a CubeSat and ground stations. By using the spatial …
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Multiple Swing Out-of-Step Relaying
… of this research work, to the Out-of-Step relaying theory, is the identification of multiple unstable swings after a given disturbance. In other words, an Out-of-Step protection scheme that handles a network that behaves as a multi-machine system is presented.
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Cooperative relaying using USRP and GNU radio
… obstructions, transmit and receive gains, and relaying approaches with the goal of determining which approaches are best in which scenarios.
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Multiuser Communications With Relaying and User Cooperation
… the remainder of the dissertation, the impact of relaying and user cooperation on downlink of wireless networks is investigated. Three two-user relay broadcast channels are studied from an information-theoretic viewpoint. These channels represent fundamental units of downlink systems that exploit …
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Computer relaying for EHV/UHV transmission lines
As the power systems grow, system connections become more complex. Due to cost and environmental concern, more and more parallel lines and series compensated lines may be installed in the system. In order to efficiently use the transmission network, more nonlinear flexible devices such as the phase …
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Adaptive out-of-step relaying with phasor measurement
… measurements were used for the first time for relaying application, proving their ability to detect and analyze system disturbances through the measurement of angle differences between any two points in a system. It is shown that for a system that behaves primarily as a two-machine power …
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Joint uplink-downlink beamforming in multi-antenna relaying schemes
The thesis examines the problem of joint receive and transmit beamforming for a wireless network which consists of one relay node equipped with multiple antennas. The transmitter and the receiver are single antenna systems. The communication system consists of two phases. In the first phase the …
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A hybrid relaying protocol for the parallel-relay network
… are combined to create a hybrid relaying protocol which is analyzed in conjunction with both regenerative coding and distributed space-time coding at the relays. Finally, the allocation of power resources to minimize the end-to-end probability of outage is considered.
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The Advancement of Adaptive Relaying in Power Systems Protection
… to operate properly. With microprocessor based relaying schemes, a hybrid reliability focus is attainable through adaptive relaying. Adaptive relaying describes protection schemes that adjust settings and/or logic of operations based on the prevailing conditions of the system. These adjustments …
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Spectrally Efficient Bidirectional Decode-and-Forward Relaying for Wireless Networks
Relaiskonzepte werden in Zunkuft in drahtlosen Netzwerken eine zentrale Rolle spielen. In dieser Dissertation wird ein Netzwerk mit drei Stationen betrachtet, in welchem zwei Stationen mittels einer Relaisstation miteinander kommunizieren. Wir untersuchen ein Zweiphasenprotokoll ohne Rückkopplung, …
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Optomal three-time slot distributed beamforming for two-way relaying
… these two transceivers, we propose a two-way relaying scheme which takes three phases (time slots) to accomplish the exchange of two information symbols between the two transceivers. In the first and second phases, the transceivers, transmit their signals, toward the relays, one after other. …
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Two–Way Relaying Communications with OFDM and BICM/BICM-ID
… in relay-aided communication system, two-way relaying communication (TWRC) achieves the highest spectral efficiency due to its bi-directional transmission capability. Nevertheless, different from the conventional point-to-point communication system, TWRC suffers from detection quality …
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Application of Kalman filtering in computer relaying of power systems
… post-fault currents and voltages for computer relaying purposes of power systems are presented. As a prerequisite for the Kalman-filtering implementation, the random description of the fault-induced noise signals was quantitatively studied. Empirical formulas that describe the random nature of …
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Quantitative Interference and Capacity Analysis of Broadband Multi-Hop Relaying Networks
… Multiplexing (OFDM) systems in mobile multi-hop relaying channels. We consider the uplink scenario and quantify the effects of mobile channel impairments such as Doppler Shift due to user mobility per hop, high-power amplifier distortions when amplifying the transmitted/relayed OFDM symbol per …
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APPLICATION OF MODAL TRANSFORMATION FOR FAULT ANALYSIS AND DIGITAL DISTANCE RELAYING
… modal transformation is described. A distance relaying criterion for shunt faults is derived and a relay scheme based on this criterion is developed. The design and software simulation of the relay scheme is described. The performance of the relay was tested using fault data obtained from the …
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Distributed Space-Time Message Relaying for Uncoded/Coded Wireless Cooperative Communications
… space-time block codes (DSTBC) in different relaying protocols and theoretically derive the BER performance for each scenario. The amplify-and-forward (AF) protocol is one of the most commonly used protocols at the relays. It has a low implementation complexity but with a drawback of …
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Joint channel pairing and power allocation optimization in two-way multichannel relaying.
We consider two-way amplify-and-forward relaying in a multichannel system with two end nodes and a single relay, using a two-slot multi-access broadcast (MABC) as well as time-division broadcast (TDBC) relaying strategies. We investigate the problem of joint subchannel pairing and power allocation …
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Cooperative relaying in cellular networks for improving receiver diversity and cell radius
… requirement. With the inception of cooperative relaying technology, a novel wireless relaying method of sharing the terminal node capabilities to forward the signal created a new paradigm to greatly improve the quality of the services and soon became the significant research area in 3G/4G …
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Measurement and modelling of errors for relaying current transformers and voltage transformers
… tool has been developed to estimate errors in relaying current transformers and voltage transformers. The tool has been developed to collect data in a substation and send it to a remote location over a telephone line. Different schemes were evaluated and tested in the laboratory. The final …
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