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In this paper, propagation mechanisms in a confined complex environment are experimentally investigated and modeled at 10 GHz. A campus student's lockers room is chosen as a propagation environment. The proposed model is implemented in Matlab using a combination of the ray tracing algorithm and uniform geometrical theory of diffraction. Moreover, a commercial ray tracing tool is used to derive wideband...
This paper reports initial results of wireless data center (WDC) 60 GHz radio channel measurements in a real data center. A channel sounder based on a vector network analyzer is used to measure the channel transfer function. In addition, ray-tracing simulations are conducted to verify the measurements accuracy. Data post processing procedure is presented to derive the power delay profiles (PDP). PDPs...
In this paper, a theoretical study of propagation mechanism in complex indoor environment is carried out. A ray-tracing approach is applied to set the parameters allowing characterizing the indoor propagation. Two cases are considered. First when the tunnel reflecting walls are supposed to be flat. In this case, path Loss and impulse response of the channel at 60 GHz are derived taking into account...
We perform a systematic analysis of a system consisting of a two-stage Colpitts oscillator. This well-known chaotic oscillator is a modification of the standard Colpitts oscillator obtained by adding an extra transistor and a capacitor to the basic circuit. The two-stage Colpitts oscillator exhibits better spectral characteristics compared to a classical single-stage Colpitts oscillator. This interesting...
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