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Multi-station inverse synthetic aperture radar (MS-ISAR) imaging mode for on-orbit space target is presented. The MS-ISAR network produces bistatic ISAR images from different radar systems in different locations, and may retrieve more information of on-orbit space target, especially, for applications of target detection and recognition, as well as three dimensional (3-D) reconstruction. Numerical...
This paper focuses on comparing fault detection (FD) performance of two robust FD approaches, namely the set-theoretic unknown input observer-based approach and the interval observer-based approach. The former is implemented using the set theory and the unknown input observer (UIO), where the set theory and the UIO are used to decouple the effect of unknown inputs in passive and active ways, respectively...
Although multi-domain survivability is a major concern, few studies have considered post-fault restoration schemes. This paper proposes two such strategies (based upon hierarchical routing and signaling crankback) to handle single link failures in multi-domain IP/MPLS networks (also extendible to optical DWDM networks). The performance of the proposed solutions is then compared via simulation.
Based on the analysis of optic spectrum to the rare earth doped glass and fabrication technique, the Er3+/Yb3+ codoped tellurite glass and its single-mode glass fiber are detailedly described here. Under exciting of 975 nm LD laser, a broad ASE (amplified spontaneous emission emitting) in range of 1450 nm to 1650 nm is observed independence of the pumping laser power. Then, an approximate quasi-analytical...
The erbium-doped 75TeO2(25-x)ZnO-xBi2O3 glasses have been explored from the density, refractive index, absorption spectra, bandwidth analysis for emission spectra, and lifetime measurements of the 4I13/2 level of Er3+ based on Judd-Ofelt and McCumber theories. The effects of bismuth oxide on these three optical parameters Omegat(t=2, 4, 6) are discussed in terms of the local basic nature of the glass...
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