Space Shuttle UHF communications performance evaluation

Fading correlation and analytical performance evaluation of the space-diversity free-space optical communications system

This paper investigates fading correlation in space-diversity free-space optical (FSO) communication systems and its effect on the link performance. We firstly evaluate the fading correlation in multiple-aperture FSO systems using wave-optics simulations. The influence of different system parameters including the link distance and aperture spacing is illustrated under realistic beam propagation...

Space Shuttle Technical Conference

Modeling the Space Shuttle

We summarize our methodology for modeling space shuttle processing using discrete event simulation. Why the project was initiated, what the overall goals were, how it was funded, and who were the members of the project team are identified. We describe the flow of the space shuttle flight hardware through the supporting infrastructure and how the model was created to accurately portray the space...

UHF RFID Tag Performance Evaluation based on Radar Cross Section

The passive ultra-high frequency (UHF) RFID is being increasingly employed in various applications. The low-cost, long range and high data rate features making it an outstanding choice in contactless identification. Although, passive tag performance is likely to be affected by water and metal, tag packages and special tag designs are developed to minimize the effect of the environment. Tag perf...

Inkjet-printed passive UHF RFID tags: review and performance evaluation

In this paper, the performance and the feasibility of inkjet-printed dipole RFID tag antennas are experimentally studied in the implementation of identifying objects with different electromagnetic properties. To estimate the performance quality, we compare our results to those obtained using traditional etched copper dipole tag antennas. We first examine the performance characteristics, i.e. th...