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The environmental radioactivity (40K, 238U, 232Th and 137Cs) in soils around Kosova-A and Kosova-B power plants is determined by high-resolution gamma-ray spectrometry method. The annual effective dose rate calculated from the activity concentration of radionuclides in soil was found to be in good agreement with that measured in situ. The geographical distribution showed that the activity concentrations...
Energy and spectral efficiency are the main challenges in 5th generation of mobile cellular networks. In this paper, we propose an optimization algorithm to optimize the energy efficiency by maximizing the spectral efficiency. Our simulation results show a significant increase in terms of spectral efficiency as well as energy efficiency whenever the mobile user is connected to a low power indoor base...
We apply constrained optimization techniques to optimally allocate the bandwidth and power to the users in a cellular network. We investigate partial frequency reuse with multiple users in the full and partial frequency regions for inter-cell interference mitigation. We show that the non-convex sum-rate maximization problem becomes convex under certain simplifying assumptions. Moreover, an efficient...
In this paper we apply constrained optimization techniques to optimally allocate bandwidth and transmit power to the users in a cellular network. We utilize partial frequency reuse with one user in the full and one user in the partial frequency reuse regions as inter-cell interference mitigation technique. We show that the non-convex sum-rate maximization problem becomes convex under some simplifying...
Inter-cell Interference (ICI) is a key issue in orthogonal frequency-division multiple access (OFDMA) systems. Since OFDMA was proposed to be used in next generation networks several schemes have been investigated for mitigating the ICI. One of the techniques that promises improvement in reducing ICI is partial frequency reuse (PFR). In this paper we investigate a flexible bandwidth allocation (FBA)...
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