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 27 for “"Link Budget"”.
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Ultra Wideband Ranging and Link Budget Design for Naval Crane Applications
… modification to the traditional narrowband link budget based on the Friis transmission formula. The proposed modification replaces frequency-domain parameters with time-domain values to handle the wide bandwidth of UWB systems. The proposed approach is shown via measurements to be much more …
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System Analysis for Satellite Networks with Free-Space Optical Links
… including phasing parameter, optical satellite link budget, tradeoff between network latency and satellite transmission power, and network latency minimization based on satellite transmission power constraints. We investigate the phasing parameter for Starlink Phase 1 Version 3 and Kuiper Shell …
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Power Efficient Wireless Sensor Node through Edge Intelligence
… observe that edge intelligence increases the link budget without significantly affecting average power dissipation.
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Empirical Approch For Rate Selection In MIMO OFDM
… Improvements of 15 dB and above are shown the link budget while using a four transmit four receive MIMO system. Proposed 802.11n TGn Sync physical layer standard is used to evaluate the performance. The performance in case of one of the systems being a legacy 802.11a/g nodes is also looked …
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Comparison of Direct and Heterodyne Detection Optical Intersatellite Communication Links
… detection optical intersatellite communication links are evaluated and compared. It is shown that the performance of optical links is very sensitive to the pointing and tracking errors at the transmitter and receiver. In the presence of random pointing and tracking errors, optimal antenna gains …
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Link Adaptation for Mitigating Earth-to-Space Propagation Effects on the NASA SCaN Testbed
… in the strength of the communications link between a satellite and its ground station. Additionally, a less-often considered effect of shadowing due to the geometry of the satellite and its solar panels can also lead to link degradation. As a result of these anticipated channel …
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Optical Temperature Monitoring of Electrical Power Transformer Networks
… and the most suitable one is assessed for link budget and cost analysis of the optical sensor network. The temperature sensing range is from 300C to 900C. The minimum temperature accuracy that can be achieved is about 0.010C. Time Division Multiplexing (TDM) is employed to identify …
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ISM S-band CubeSat Radio Designed for the PolySat System Board
… Medical (ISM) radio band.</p> <p>Estimating a link budget for a realistic CubeSat leads to the conclusion that this system will require a large deployable CubeSat antenna, large earth station satellite dish, and a fine-pointing attitude control system. Noise floor measurements of a CubeSat …
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System Design of an Integrated Terrestrial-Satellite Communications Network for Disaster Recovery
… and satellite networks were determined by a link budget analysis and a consideration of network implementations. The reflector antenna used by the earth station was designed. In addition, other system design concerns and engineering tradeoffs, including adjacent satellite interference, rain …
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Analysis and modelling of the impact of anomalous propagation on terrestrial microwave links in a subtropical region, based on long-term measurements. Statistical analysis of long-term meteorological and signal strength measurements in a subtropical region and investigation of the impact of anomalous refractivity profiles on radio propagation in terrestrial microwave wireless systems
… anomalous phenomena on terrestrial microwave links. Twenty-three years of meteorological measurements, from 1990 to 2013, are utilized using spatially separated surface stations and a single radiosonde in the United Arab Emirates (UAE). Profiles of sea level, surface and upper refractivity …
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RadioSTAR (Radio Spacecraft for Telecommunications Assessment and Risk-reduction): A 3U CubeSat for validation of ground stations and link budgets
… recommissioned, or updated in order to provide uplink and downlink access. However, prior to deployment of a spacecraft, it is difficult to evaluate a ground station’s performance capabilities. Over-the-air testing with the spacecraft, prior to launch, may not be possible for remotely located …
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CMOS THz-ID: A 1.6mm² Package-Less Identification Tag Using 260-GHz Far-Field Backscatter Communication
… for RF tags, enables beam-steering for enhanced link budget. The presented tag has a peak power consumption of 21 𝜇W and can be powered by a chip-wide array of photodiodes. Using a low-cost 65-nm bulk CMOS technology, the THz-ID chip has an area of only 1.6 mm^2 and demonstrates measured downlink …
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Automated Electronic Mode Stirring in Reverberant Cavities to Optimize Backscatter Link Margins
… losses incurred by backscatter communication links, the system link budget is very sensitive to these nulls. Real-world applications require a strategy to mitigate this path loss actively in a wireless uplink, while conforming to the size, weight, and power constraints of the system. Past …
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Wireless Communication with Medical Implants: Antennas and Propagation
… Today the communication is done by an inductive link between the implant and an external coil at a low carrier frequency. Extended range and communication speed are possible to achieve by increasing the carrier frequency and the bandwidth. One frequency band that is available for this application …
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A Proposed Architecture for a High-Data Rate Mobile Lmds Network
… These criteria are examined through link budget analysis, layout designs, and throughput efficiency. System throughput specifications are calculated for services, such as web browsing, email, ftp, and voice services to 100 train commuters. The information rate was 134.4 Mbps. The …
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Reliable broadband satellite-integrated network design through propagation and networking solutions
… broadband services. To interface satellite links with existing terrestrial networks for providing communication access to a variety of users directly, several performance issues need to be addressed. Current thesis presents a technically viable satellite-integrated network model that is …
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Transmission capacity improvement for high speed multimode waveguide links using advanced optical launch and multilevel modulation schemes
… capacity improvement in multimode waveguide links. The first half of the dissertation focuses on the multimode waveguide made from glass, the multimode glass fibre. A new optical launch scheme is developed, namely low-loss Hermite-Gaussian launch, to achieve single mode group excitation in …
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Low-Power RF Front-End Design for Wireless Body Area Networks
… Based on the system performance study, the link budget was derived as a groundwork for our RF front-end design. Next, we examined candidate RF front-end architectures suitable for MICS applications. Based on our study, we proposed to adopt a direct conversion transmitter and a low-IF …
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Accurate Prediction of Scintillation Degradation Applicable to Satellite Communication Systems Design
… effects need to be considered in the design and link-budget calculations of these systems.<br/><br/>In this thesis, the results are shown of an extensive measurement analysis of tropospheric scintillation, using the ITALSAT satellite beacon signals at 18.7, 39.6 and 49.5 GHz, recorded at …
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Transceiver design and system optimization for ultra-wideband communications
… to possibly implement the proposed pulses. A link budget is quantified based on an accurate frequency-dependent path loss calculation to account for variations across the ultra-wide bandwidth of the signal. Achievable information rates are quantified as a function of transmission distance over …
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