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We present a plasmonic absorber of Fabry-Perot-like resonator and demonstrate the tuning capability of its spectral response. The conventional resonator comprises two spaced layers of gold to act as a confinement for the light and resonant structure. The cavity thickness can be used efficiently as a tuning parameter for the absorber frequency response. The unloaded absorber shows high absorption greater...
In this paper, we investigate the effect of applying asymmetry to the split ring nanosandwich on its refractive index sensitivity and optical response. Three different asymmetry configurations are studied which are: rotating the upper split ring, tapering the edges and stacking up additional layers to the nanosandwich structure. Each of these configurations shows a significant influence on the sensitivity...
Cognitive radio is the solution to the scarcity of the licensed spectrum. The achievability of the sum-capacity of the cognitive radio under different channel conditions and message structures were studied in literature, specifically for the linear deterministic approximation (LDA) interference channel with cumulative message sharing (IFC-CMS). It was postulated that the achievability of the sum-...
In this paper, the sensitivity of the split ring nanosandwich is studied after applying asymmetry to the structure. There are two asymmetry configurations that will be presented in this paper which include the tapered-down and the tapered-up configurations. The optical response in both configurations is studied and the sensitivity is measured at varying the asymmetry parameter. This design is characterized...
In this paper, we present a novel design of a nanosandwich antenna array used for refractive index sensing. The nanosandwich sensor consists of two gold rings with centered gaps separated with a silica disk spacer. The optical properties of the nanoantenna structure are investigated. The influence of the gaps in the upper and lower rings on the nanoantenna field enhancement and spectral response is...
The current WiMAX operators have to choose whether to utilize reuse-1 (R-1) or reuse-3 (R-3) frequency planning pattern. The R-1 pattern achieves high spectral efficiency but results in high inter-cell interference(ICI), especially at the cell-edge users. As for the R-3, it reduces the ICI and guarantees coverage to the cell-edge users. However, the R-3 pattern still achieves low cell-edge user throughput...
This paper proposes a new scheduling algorithm for IEEE 802.16-2005 Broadband Wireless Metropolitan Area Networks in TDD mode. The proposed algorithm focuses on an efficient mechanism to serve high priority traffic in congested networks, without violating the right of lower-priority-traffic to be served in adequate manner. In this work, a detailed simulation study is carried out for the proposed scheduling...
This paper proposes a new scheduling algorithm for IEEE 802.16-2005 Broadband Wireless Metropolitan Area Networks in TDD mode. The proposed algorithm focuses on solving the problem of handling high priority traffic in congested networks while minimizing starvation conditions for other served classes. In this work, a detailed simulation study is carried out for the proposed scheduling algorithm as...
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