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.
Results
Showing 1 to 20 of 69 for “"free space optical"”.
-
Silicon Photomultipliers as Free Space Optical Communication Sensors
Free-space optical communications (FSOC) is a growing field that presents an attractive alternative to the the current technology standard of radio frequency (RF) communications. Typical optical carriers have smaller SWaP in comparison to RF systems due to the difference in required aperture sizes. …
-
Wireless personal area networks and free-space optical links
… systems: infrared data association (IrDA) and free space optics (FSO). A model for the IrDA (indoor infrared) link layer is developed by considering the presence of bit errors. Based on this model, the effect of propagation delay on the link through put is investigated. An optimization study is …
-
Sensorless Wavefront Correction Algorithms for Free-Space Optical Communications
Free-space optical communications (FSOC) technology facilitates high-throughput wireless links across large distances with low size, weight, and power (SWaP) terminals. However, it is difficult to design reliable, low-cost FSOC terminals for long-range links through the atmosphere. Even in clear …
-
System Analysis for Satellite Networks with Free-Space Optical Links
… several system parameters and performances for free-space optical satellite networks (FSOSNs), including phasing parameter, optical satellite link budget, tradeoff between network latency and satellite transmission power, and network latency minimization based on satellite transmission power …
-
Multi-Transceiver Free-Space-Optical Structures for Mobile Ad-Hoc Networks
… per-node throughput, we propose a novel &ldquo optical antenna &rdquo model that is tessellated with multiple free-space-optical (FSO) transmitter and receiver (transceiver) pairs that exploit spatial reuse of the shared medium and are capable of handling extremely high data rates using optical …
-
Tracking algorithms under boundary layer effects for free-space optical communications
Free-space optical communication requires accurate tracking to maintain links. The tracking problem between an aircraft and satellite becomes more difficult with the introduction of a turret on the aircraft for increased field-of-regard. In the case of a hemispherical turret, the disrupted airflow …
-
Strategies for limiting interference and interception of free space optical communications
Free space optical systems provide an attractive solution to communication needs that require inexpensive, easily deployable links capable of high data rate transmissions. A major challenge of free space optical communication is ensuring the integrity and confidentiality of the transmitted …
-
Low-Cost Spatial Light Modulator for Applications in Free-Space Optical Communication
… distortions. AO is an enabling technology for Free-Space Optical Communication, whose performance is severely degraded by the atmosphere. This thesis proposes two low-cost AO strategies: (1) repurposing Liquid Crystal (LC) SLM from an old display projector and (2) sensorless correction enabled …
-
Free-space optical networks : fade and interference mitigation and network congestion control
Optical communication through the atmospheric channel is commonly known as free-space optical (FSO) communication. When communicating through a clear FSO channel, not only is there atmospheric turbulence which results in fading of the received signal, but there may also be interference that …
-
Importance sampling simulation of free-space optical APD pulse position modulation receivers
Free-space optical communication technology has many advantages over RF/microwave in satellite and other spacecraft applications where reductions in size, weight and prime power requirements are combined with increased data transfer capability over long distances. Ultimately, the design and …
-
Transmitter and receiver circuits for digital free-space optical interconnect: design and simulation
… connections at short distance, including dense optical interconnections directly to silicon integrated circuit chips. Optical interconnects to chips have been studied for a long time. This study started with the seminal paper by Goodman [1]. Since then, many authors have addressed the benefits …
-
Modeling and performance evaluation of free space optical link for ground-to-train communications
… internet connection on-board fast-moving trains. Free Space Optical (FSO) Communications technology promises a bright future for various applications, due to its cost-effectiveness, ease of deployment, and huge unregulated bandwidth, which gives it an edge over contemporary technologies. However, …
-
Theoretical and practical limits on the design and fabrication of free-space optical interconnects
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1991.
-
Design and fabrication of a hi-fidelity free space optical Grover multiport for sensing applications
Recent advances in optical interferometry have involved the development of unbiased multiport devices using linear optical components that have the potential to yield significant advancements in sensing capabilities for relatively small increases in size and complexity. The unbiased four port case, …
-
Laser beacon tracking for free-space optical communication on small-satellite platforms in low-earth orbit
Free-space optical (FSO) communication, or laser communication, is capable of providing high-rate communication links, meeting the growing downlink demand of space missions, including those on small-satellite platforms. FSO communication takes advantage of the high-gain nature of narrow laser beams …
-
Reciprocity-enhanced time-division multiplexed optical switching with spatial diversity for free-space optical communication links
… analysis and experimental measurements of a free-space optical communications system that exploits optical reciprocity to switch between multiple (N) spatially-diverse apertures to increase data transmission through a scintillating channel. Electromagnetic signals, specifically optical, …
Page 1 of 4